120 results on '"Markus Puschenreiter"'
Search Results
2. Rhizosphere processes and nickel mobilization by the nickel hyperaccumulator Odontarrhena chalcidica
- Author
-
Sören B.L. Risse, Markus Puschenreiter, and Alice Tognacchini
- Abstract
Background and aims Plant Ni uptake in aboveground biomass exceeding concentrations of 1000 µg g− 1 in dry weight is defined as Ni hyperaccumulation. Whether hyperaccumulators are capable of mobilizing larger Ni pools than non-accumulators is still debated and rhizosphere processes are still largely unknown. Aim of this study was to investigate rhizosphere processes and possible Ni mobilization by the Ni hyperaccumulator Odontarrhena chalcidica and to test Ni uptake in relation to a soil Ni gradient.Methods The Ni hyperaccumulator O. chalcidica was grown in a pot experiment on six soils showing a pseudo-total Ni and labile (DTPA-extractable) Ni gradient and on an additional soil showing high pseudo-total but low labile Ni. Soil pore water was sampled to monitor changes in soil solution ionome, pH, and dissolved organic carbon (DOC) along the experiment.Results Results showed that Ni and Fe concentrations, pH as well as DOC concentrations in pore water were significantly increased by O. chalcidica compared to unplanted soils. A positive correlation between Ni in shoots and pseudo-total concentrations and pH in soil was observed, although plant Ni concentrations did not clearly show the same linear pattern with soil available Ni.Conclusions This study shows a clear root-induced Ni and Fe mobilization in the rhizosphere of O. chalcidica and suggests a rhizosphere mechanism based on soil alkalinization and exudation of organic ligands. Furthermore, it was demonstrated that soil pH and pseudo-total Ni are better predictors of Ni plant uptake in O. chalcidica than labile soil Ni.
- Published
- 2023
3. Selective Diffusive Gradients in Thin Films (DGT) for the Simultaneous Assessment of Labile Sr and Pb Concentrations and Isotope Ratios in Soils
- Author
-
Stefan Wagner, Jakob Santner, Johanna Irrgeher, Markus Puschenreiter, Steffen Happel, and Thomas Prohaska
- Subjects
Soil ,Isotopes ,Lead ,Strontium ,Soil Pollutants ,Environmental Monitoring ,Analytical Chemistry - Abstract
A method using diffusive gradients in thin films (DGT) for the accurate quantification of trace-level (μg L
- Published
- 2022
4. Soil formation, nutrient supply and ecosystem productivity on basaltic lava vs rhyolitic pumice on Alcedo Volcano, Galápagos
- Author
-
Armin Bajraktarevic, Markus Puschenreiter, I Nyoman Candra, Franz Zehetner, Heinke Jäger, Martin H. Gerzabek, Tamara C. Dinter, Katharina M. Keiblinger, and Claudio Bini
- Subjects
geography ,geography.geographical_feature_category ,biology ,Lava ,Geochemistry ,Soil Science ,Environmental Science (miscellaneous) ,Alcedo ,biology.organism_classification ,Andosol ,Pedogenesis ,Volcano ,Pumice ,Soil water ,Environmental science ,Earth-Surface Processes ,Leptosol - Abstract
Context Rock type may exert strong control on pedogenesis and resulting soil characteristics. Little is known on how different volcanic lithologies influence soil formation and nutrient supply and thereby affect ecosystem productivity in volcanic landscapes. Aims The aim of this study was to investigate lithologic control on the mentioned properties and processes. Methods We conducted a side-by-side comparison of two contrasting sites in close proximity on Alcedo Volcano, Galápagos, one on basaltic lava and the other on rhyolitic pumice. Key results The lava site was covered by lush, stratified woodland, whereas the pumice site was covered by grassland with only few plant species. The soil on lava was a Leptosol, whereas on pumice, an Andosol had formed. Both soils had similar pH (6.0–6.5 in H2O), but the soil organic carbon stocks at the lava site were almost twice as high as at the pumice site (13.1 ± 1.6 vs 7.6 ± 1.3 kg m−2 to 25 cm depth). The soil at the pumice site had considerably lower levels of Mehlich-3-extractable P, Ca, Mg, Cu, Zn and B. Soil microbes at the pumice site had lower biomass P (and a higher C:P ratio) and excreted more phosphatase. The grass biomass here also showed lower (and deficient) levels of P and other nutrients compared to the lava site. Conclusions and implications The contrasting lithologies and their bearings on soil formation and nutrient availability diversify the aboveground and belowground ecosystems and favour the development of distinct ecological niches in close proximity.
- Published
- 2021
5. Diffusive gradients in thin films predicts crop response better than calcium-acetate-lactate extraction
- Author
-
Markus Puschenreiter, Walter W. Wenzel, Benjamin Hill, Heide Spiegel, and Jakob Santner
- Subjects
Crop yield ,Phosphorus ,Extraction (chemistry) ,Soil Science ,chemistry.chemical_element ,engineering.material ,Diffusive gradients in thin films ,Crop ,Agronomy ,chemistry ,Soil water ,engineering ,Hordeum vulgare ,Fertilizer ,Agronomy and Crop Science - Abstract
Soil P testing has been widely used to predict crop yields, P uptake, and fertilizer demands in agriculture. Diffusive gradients in thin films (DGT) provides a zero-sink soil P test which mimics diffusion-controlled plant uptake and has previously been found to predict P availability to crops better than conventional quantity-based P tests in highly weathered Australian, though not in European soils. Here we tested the performance of DGT and the Austrian and German standard P quantity test calcium acetate lactate (CAL) to explain the variation of crop yield and P uptake response of winter wheat (Triticum aestivum L.) and spring barley (Hordeum vulgare L.) in long-term P fertilization experiments at four different sites in eastern Austria. Phosphorus extracted with DGT (P-DGT) and CAL (P-CAL) correlated well in similar soils but not across sites with large variation in soil and site properties such as carbonate equivalent and water availability. The predictive power of DGT for barley (R2 = 0.42) and wheat grain yield (R2 = 0.32), and P uptake in wheat grains (R2 = 0.36) was clearly superior to that of the CAL, and less dependent on soil properties. The better performance of DGT compared to the quantity test is consistent with diffusion-limited P uptake in the water-limited cultivated soils of eastern Austria. The critical values of P deficiency derived from the Mitscherlich-type fits for barley and wheat at 80% relative yield are 64.9 and 26.2 µg L−1, respectively, consistent with differential P demands of the crops.
- Published
- 2021
6. Heavy metal contents in organic baby-food-carrots
- Author
-
Markus Puschenreiter, Amal Aryan, Rita Kappert, and J. Balas
- Subjects
Baby food ,Chemistry ,Food science ,Horticulture - Published
- 2021
7. Endophytic yeast protect plants against metal toxicity by inhibiting plant metal uptake through an ethylene-dependent mechanism
- Author
-
Agnieszka Domka, Roman Jędrzejczyk, Rafał Ważny, Maciej Gustab, Michał Kowalski, Michał Nosek, Jakub Bizan, Markus Puschenreiter, Marek Vaculίk, Ján Kováč, and Piotr Rozpądek
- Subjects
iron ,hormones ,metal toxicity ,Physiology ,growth ,ethylene ,endophytes ,Plant Science ,heavy metals ,symbiosis - Abstract
Toxic metal pollution requires significant adjustments in plant metabolism. Here, we show that the plant microbiota plays an important role in this process. The endophytic Sporobolomyces ruberrimus isolated from a serpentine population of Arabidopsis arenosa protected plants against excess metals. Coculture with its native host and Arabidopsis thaliana inhibited Fe and Ni uptake. It had no effect on host Zn and Cd uptake. Fe uptake inhibition was confirmed in wheat and rape. Our investigations show that, for the metal inhibitory effect, the interference of microorganisms in plant ethylene homeostasis is necessary. Application of an ethylene synthesis inhibitor, as well as loss-of-function mutations in canonical ethylene signalling genes, prevented metal uptake inhibition by the fungus. Coculture with S. ruberrimus significantly changed the expression of Fe homeostasis genes: IRT1, OPT3, OPT6, bHLH38 and bHLH39 in wild-type (WT) A. thaliana. The expression pattern of these genes in WT plants and in the ethylene signalling defective mutants significantly differed and coincided with the plant accumulation phenotype. Most notably, down-regulation of the expression of IRT1 solely in WT was necessary for the inhibition of metal uptake in plants. This study shows that microorganisms optimize plant Fe and Ni uptake by fine-tuning plant metal homeostasis.
- Published
- 2022
8. Phosphorus depletion controls Cu and Zn biogeochemistry in canola and corn rhizosphere on a calcareous soil
- Author
-
Walter W. Wenzel, Alireza Golestanifard, Amal Aryan, and Markus Puschenreiter
- Subjects
Rhizosphere ,food.ingredient ,food ,Chemistry ,Phosphorus ,Environmental chemistry ,Soil Science ,Biogeochemistry ,chemistry.chemical_element ,Canola ,Calcareous - Published
- 2021
9. Nettle, a Long-Known Fiber Plant with New Perspectives
- Author
-
Chloé Viotti, Katharina Albrecht, Stefano Amaducci, Paul Bardos, Coralie Bertheau, Damien Blaudez, Lea Bothe, David Cazaux, Andrea Ferrarini, Jason Govilas, Hans-Jörg Gusovius, Thomas Jeannin, Carsten Lühr, Jörg Müssig, Marcello Pilla, Vincent Placet, Markus Puschenreiter, Alice Tognacchini, Loïc Yung, Michel Chalot, Laboratoire Chrono-environnement (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), HSB—City University of Applied Sciences Bremen (HSB—City University of Applied Sciences Bremen), Laboratoire Interdisciplinaire des Environnements Continentaux (LIEC), Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Terre et Environnement de Lorraine (OTELo), Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174) (FEMTO-ST), Université de Technologie de Belfort-Montbeliard (UTBM)-Ecole Nationale Supérieure de Mécanique et des Microtechniques (ENSMM)-Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), ANR-17-EURE-0002,EIPHI,Ingénierie et Innovation par les sciences physiques, les savoir-faire technologiques et l'interdisciplinarité(2017), ANR-15-IDEX-0004,LUE,Isite LUE(2015), and European Project: 771134
- Subjects
Urtica dioica L ,cultivation ,phytomanagement ,[INFO.INFO-DS]Computer Science [cs]/Data Structures and Algorithms [cs.DS] ,General Materials Science ,[PHYS.MECA]Physics [physics]/Mechanics [physics] ,phylogeny ,fiber production and processing ,Settore AGR/02 - AGRONOMIA E COLTIVAZIONI ERBACEE ,[SPI.AUTO]Engineering Sciences [physics]/Automatic ,stinging nettle - Abstract
International audience; The stinging nettle Urtica dioica L. is a perennial crop with low fertilizer and pesticide requirements, well adapted to a wide range of environmental conditions. It has been successfully grown in most European climatic zones while also promoting local flora and fauna diversity. The cultivation of nettle could help meet the strong increase in demand for raw materials based on plant fibers as a substitute for artificial fibers in sectors as diverse as the textile and automotive industries. In the present review, we present a historical perspective of selection, harvest, and fiber processing features where the state of the art of nettle varietal selection is detailed. A synthesis of the general knowledge about its biology, adaptability, and genetics constituents, highlighting gaps in our current knowledge on interactions with other organisms, is provided. We further addressed cultivation and processing features, putting a special emphasis on harvesting systems and fiber extraction processes to improve fiber yield and quality. Various uses in industrial processes and notably for the restoration of marginal lands and avenues of future research on this high-value multi-use plant for the global fiber market are described.
- Published
- 2022
10. Fertilization regimes affecting nickel phytomining efficiency on a serpentine soil in the temperate climate zone
- Author
-
Julia Thüringer, Christina Hipfinger, Theresa Rosenkranz, and Markus Puschenreiter
- Subjects
0106 biological sciences ,Yield (engineering) ,Swine ,Field experiment ,Plant Science ,010501 environmental sciences ,01 natural sciences ,Soil ,Human fertilization ,Nickel ,Temperate climate ,Animals ,Soil Pollutants ,Environmental Chemistry ,Hyperaccumulator ,Fertilizers ,0105 earth and related environmental sciences ,fungi ,food and beverages ,Pollution ,Manure ,Phytoremediation ,Biodegradation, Environmental ,Agronomy ,Fertilization ,Serpentine soil ,Soil water ,Environmental science ,Cattle ,Female ,010606 plant biology & botany - Abstract
Phytomining of nickel (Ni) refers to cropping of selected Ni hyperaccumulator plants on Ni-rich serpentine soils. In this study, the effect of different fertilization regimes on the Ni yield of Odo...
- Published
- 2020
11. Root foraging and avoidance in hyperaccumulator and excluder plants: a rhizotron experiment
- Author
-
Antony van der Ent, Mirko Salinitro, Markus Puschenreiter, Alice Tognacchini, Department of Forest and Soil Sciences, Universität für Bodenkultur Wien [Vienne, Autriche] (BOKU), Department of Biological, Geological, and Environmental Sciences [Bologna], Alma Mater Studiorum Università di Bologna [Bologna] (UNIBO), Laboratoire Sols et Environnement (LSE), Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Centre for Mined Land Rehabilitation, University of Southern Queensland (USQ), Tognacchini A., Salinitro M., Puschenreiter M., and van der Ent A.
- Subjects
inorganic chemicals ,0106 biological sciences ,Root avoidance ,Foraging ,Soil Science ,chemistry.chemical_element ,Plant Science ,010501 environmental sciences ,Biology ,Avoidance response ,01 natural sciences ,food ,Nickel ,Botany ,Stellaria media ,otorhinolaryngologic diseases ,[SDV.BV]Life Sciences [q-bio]/Vegetal Biology ,Hyperaccumulator ,Root foraging ,0105 earth and related environmental sciences ,Cadmium ,Rhizotron ,Plant physiology ,food.food ,Metal tolerance ,chemistry ,Hyperaccumulation ,010606 plant biology & botany - Abstract
AimsMetal hyperaccumulation is a rare phenomenon described for an increasing number of plant taxa. In this study we investigated the root growth responses of the well-known nickel, zinc, cadmium hyperaccumulatorNoccaea caerulescensand of the metal tolerant (non-accumulator)Stellaria media, in order to observe root foraging vs avoidance responses to nickel. MethodsTo allow for observations of root growth and foraging preferences, two accessions ofNoccaea caerulescensand two accessions ofStellaria mediaorginating from high nickel and low nickel habitats were grown in rhizotrons with localized nickel enrichment.ResultsThe root density in the control and nickel-enriched soil areas in the rhizotrons with differentN. caerulescensaccessions had distinct responses: moderate nickel avoidance was recorded for the non-nickel accession, while a clear foraging response was observed inN. caerulescensfrom the nickel accession. In contrast, nickel rooting avoidance was observed for bothS. mediaaccessions and was more pronounced in the non-nickel accession.ConclusionsThis study shows thatN. caerulescensoriginating from different accessions responded differently to soil nickel enrichment, with the nickel accession ofN. caerulescensactively foraging for nickel, suggesting a physiological adaptation and demand for this metal. In contrast, a clear nickel avoidance response by a metal tolerant species, S. media, was observed in this study, a phenomenon which has not been previously described; this suggests that root avoidance responses might play a role in the adaptation of metal tolerant species to Ni-rich soils.
- Published
- 2020
12. Editorial: Exploring Plant Rhizosphere, Phyllosphere and Endosphere Microbial Communities to Improve the Management of Polluted Sites
- Author
-
Michel Chalot, Markus Puschenreiter, Laboratoire Chrono-environnement - CNRS - UBFC (UMR 6249) (LCE), Centre National de la Recherche Scientifique (CNRS)-Université de Franche-Comté (UFC), Université Bourgogne Franche-Comté [COMUE] (UBFC)-Université Bourgogne Franche-Comté [COMUE] (UBFC), Faculté des Sciences et Technologies [Université de Lorraine] (FST ), Université de Lorraine (UL), and University of Natural Resources and Life Sciences (BOKU)
- Subjects
0106 biological sciences ,2. Zero hunger ,Microbiology (medical) ,[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,Rhizosphere ,polluted sites ,microbial communities ,04 agricultural and veterinary sciences ,15. Life on land ,01 natural sciences ,Microbiology ,QR1-502 ,high-throughput sequencing technologies ,Editorial ,13. Climate action ,Botany ,040103 agronomy & agriculture ,plant growth promoting microorganisms (PGPM) ,0401 agriculture, forestry, and fisheries ,Environmental science ,highthroughput sequencing technologies ,Phyllosphere ,plant inoculation ,ComputingMilieux_MISCELLANEOUS ,010606 plant biology & botany - Abstract
International audience
- Published
- 2021
13. Effect of Chelant-Based Soil Washing and Post-Treatment on Pb, Cd, and Zn Bioavailability and Plant Uptake
- Author
-
Christoph Noller, Markus Puschenreiter, Wolfgang Friesl-Hanl, Rebecca Hood-Nowotny, and Andrea Watzinger
- Subjects
Zerovalent iron ,Environmental Engineering ,Environmental remediation ,Chemistry ,Ecological Modeling ,Soil pollution ,Zero-valent iron ,Amendment ,food and beverages ,Remediation ,Pollution ,Soil contamination ,complex mixtures ,Article ,Bioavailability ,chemistry.chemical_compound ,Biochar ,Environmental chemistry ,Soil water ,Environmental Chemistry ,Aqua regia ,Toxic metals ,Vermicompost ,Water Science and Technology - Abstract
The remediation of Pb, Cd, and Zn contaminated soil by ex situ EDTA washing was investigated in two pot experiments. We tested the influence of (i) 0, 0.5, 1.0, and 1.5%wt zero-valent iron (ZVI) and (ii) a combination of 5%wt vermicompost, 2%wt biochar, and 1%wt ZVI on the metal availability in EDTA-washed soil using different soil extracts (Aqua regia, NH4NO3) and plant concentrations. We found that EDTA soil washing significantly reduced the total concentration of Pb, Cd, and Zn and significantly reduced the Cd and Zn plant uptake. Residual EDTA was detected in water extracts causing the formation of highly available Pb-EDTA complexes. While organic amendments had no significant effect on Pb behavior in washed soils, an amendment of ≥ 1%wt ZVI successfully reduced EDTA concentrations, Pb bioavailability, and plant uptake. Our results suggest that Pb-EDTA complexes adsorb to a Fe oxyhydroxide layer, quickly developing on the ZVI surface. The increase in ZVI application strongly decreases Zn concentrations in plant tissue, whereas the uptake of Cd was not reduced, but even slightly increased. Soil washing did not affect plant productivity and organic amendments improved biomass production. Supplementary Information The online version contains supplementary material available at 10.1007/s11270-021-05356-0.
- Published
- 2021
14. Exploring the Potential Risk of Heavy Metal Pollution of Edible Cultivated Plants in Urban Gardening Contexts Using a Citizen Science Approach in the Project 'Heavy Metal City-Zen'
- Author
-
Elisabeth Ziss, Wolfgang Friesl-Hanl, Sophia Götzinger, Christoph Noller, Markus Puschenreiter, Andrea Watzinger, and Rebecca Hood-Nowotny
- Subjects
Environmental sciences ,urban garden ,contamination ,Environmental effects of industries and plants ,citizen science ,trace metals ,TJ807-830 ,GE1-350 ,health impact ,TD194-195 ,Renewable energy sources - Abstract
Urban gardening has become increasingly popular, creating green oases in cities, however, many of these activities are undertaken in areas of high traffic density or on ex-brown field sites. As a consequence, there are still some barriers to the adoption of these urban gardening practices for food production. One of the public concerns is the transfer of urban pollutants such as heavy metals into the consumer’s food chain, however, city-wide data is often difficult and expensive to collect. In the citizen science project described herein, we conducted simple citizen-led common collaborative experiments in urban community gardens. These data provided information on the potential risk of heavy metal contaminants and ways in which to mitigate those risks in an urban gardening context. Generally, values were below guideline thresholds, however, at a few garden sites, soil trace metal concentrations (Pb, Cd, Zn) exceeded Austrian recommended limits. Moreover, only at two sites were plant trace metal concentrations shown to be above European food standards limits. Given the citizen’s positive response to the project, we suggest expanding this study to the whole of Vienna, giving newly established gardens a chance to predetermine the risks posed by their local soils.
- Published
- 2021
- Full Text
- View/download PDF
15. In situ spatiotemporal solute imaging of metal corrosion on the example of magnesium
- Author
-
Stefan Wagner, Christina Hummel, Jakob Santner, Markus Puschenreiter, Johanna Irrgeher, Walter W. Wenzel, Sergey M. Borisov, and Thomas Prohaska
- Subjects
Corrosion ,Diffusion ,Alloys ,Environmental Chemistry ,Magnesium ,Laser Therapy ,Biochemistry ,Spectroscopy ,Analytical Chemistry - Abstract
Visualization and quantification of corrosion processes is essential in materials research. Here we present a new approach for 2D spatiotemporal imaging of metal corrosion dynamics in situ. The approach combines time-integrated Mg
- Published
- 2021
16. Arsenic redox transformations and cycling in the rhizosphere of
- Author
-
Christoph Hoefer, Brett Robinson, Stephan Hann, Stefan Wagner, Walter W. Wenzel, Eva Oburger, Jakob Santner, Markus Puschenreiter, and Ruben Kretzschmar
- Subjects
0106 biological sciences ,0301 basic medicine ,Bulk soil ,Diffusive gradients in thin films ,chemistry.chemical_element ,Plant Science ,01 natural sciences ,Redox ,Article ,03 medical and health sciences ,chemistry.chemical_compound ,Ecology, Evolution, Behavior and Systematics ,Arsenic ,Arsenite ,Rhizosphere ,Planar optodes ,biology ,Phosphorus ,Chemical imaging ,Arsenic speciation ,Laser ablation inductively coupled plasma mass spectrometry ,Arsenate ,biology.organism_classification ,030104 developmental biology ,chemistry ,Environmental chemistry ,Pteris vittata ,Agronomy and Crop Science ,010606 plant biology & botany - Abstract
Pteris vittata (PV) and Pteris quadriaurita (PQ) are reported to hyperaccumulate arsenic (As) when grown in As-rich soil. Yet, little is known about the impact of their unique As accumulation mechanisms on As transformations and cycling at the soil-root interface. Using a combined approach of two-dimensional (2D), sub-mm scale solute imaging of arsenite (AsIII), arsenate (AsV), phosphorus (P), manganese (Mn), iron (Fe) and oxygen (O2), we found localized patterns of AsIII/AsV redox transformations in the PV rhizosphere (AsIII/AsV ratio of 0.57) compared to bulk soil (AsIII/AsV ratio of ≤0.04). Our data indicate that the high As root uptake, translocation and accumulation from the As-rich experimental soil (2080 mg kg−1) to PV fronds (6986 mg kg−1) induced As detoxification via AsV reduction and AsIII root efflux, leading to AsIII accumulation and re-oxidation to AsV in the rhizosphere porewater. This As cycling mechanism is linked to the reduction of O2 and MnIII/IV (oxyhydr)oxides resulting in decreased O2 levels and increased Mn solubilization along roots. Compared to PV, we found 4-fold lower As translocation to PQ fronds (1611 mg kg−1), 2-fold lower AsV depletion in the PQ rhizosphere, and no AsIII efflux from PQ roots, suggesting that PQ efficiently controls As uptake to avoid toxic As levels in roots. Analysis of root exudates obtained from soil-grown PV showed that As acquisition by PV roots was not associated with phytic acid release. Our study demonstrates that two closely-related As-accumulating ferns have distinct mechanisms for As uptake modulating As cycling in As-rich environments., Environmental and Experimental Botany, 177, ISSN:0098-8472, ISSN:1873-7307
- Published
- 2021
17. A nickel phytomining field trial using Odontarrhena chalcidica and Noccaea goesingensis on an Austrian serpentine soil
- Author
-
Charline Ridard, Christina Hipfinger, Theresa Rosenkranz, and Markus Puschenreiter
- Subjects
Environmental Engineering ,0208 environmental biotechnology ,Bulk soil ,02 engineering and technology ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,01 natural sciences ,Soil ,Nickel ,Soil pH ,Soil Pollutants ,Hyperaccumulator ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Rhizosphere ,biology ,Chemistry ,Intercropping ,General Medicine ,biology.organism_classification ,020801 environmental engineering ,Biodegradation, Environmental ,Agronomy ,Austria ,Serpentine soil ,Soil water ,Shoot - Abstract
Phytomining of nickel (Ni) is based on the cropping of Ni hyperaccumulators on Ni-rich serpentine soils. The efficiency of this approach is dependent on shoot nickel concentration and harvestable biomass. In a field experiment conducted on an Austrian serpentine site, the phytomining efficiency of the two plant species Odontarrhena chalcidica (syn. Alyssum murale) and Noccaea goesingensis was evaluated. O. chalcidica was planted in three treatments: control, sulphur application (0.46 g S kg−1 soil) and intercropping with the legume Lotus corniculatus. For N. goesingensis the treatments control, high-density planting (110 plants m−2) and intercropping were implemented. Given the experimental set-up, shoot biomass, shoot Ni concentration and thus the total amount of harvested Ni were on average higher for O. chalcidica. The highest Ni yield was achieved with O. chalcidica, reaching 55 kg Ni ha−1 in the sulphur treatment. N. goesingensis showed the maximum yield in the high-density treatment with 36 kg Ni ha−1. However, high-density planting of N. goesingensis and sulphur application to O. chalcidica plots did not significantly increase the Ni yield compared to the control. Intercropping with L. corniculatus tended to decrease the shoot biomass of both species. Planting of the hyperaccumulators led to a decrease of DTPA-extractable Ni and to an increase of soil pH, with the exception of sulphur-amended plots. Likewise, rhizosphere soil pH was higher than bulk soil values. Our data suggest that in particular O. chalcidica is suitable for Ni phytomining on the tested site. Measures to further increase the Ni yield and to optimise crop management will be evaluated in follow-up experiments.
- Published
- 2019
18. Differentiation between physical and chemical effects of oil presence in freshly spiked soil during rhizoremediation trial
- Author
-
Syed Gul Abbas Shah Sani, Markus Puschenreiter, Thomas G. Reichenauer, Waqas-us-din Khan, Imran Hussain, and Soja Gerhard
- Subjects
Health, Toxicology and Mutagenesis ,Germination ,010501 environmental sciences ,complex mixtures ,01 natural sciences ,Soil ,Diesel fuel ,Lolium ,Plant Oils ,Soil Pollutants ,Environmental Chemistry ,Lotus corniculatus ,Biomass ,Soil Microbiology ,Legume ,Plant growth ,0105 earth and related environmental sciences ,biology ,Microbiota ,fungi ,food and beverages ,General Medicine ,Lolium multiflorum ,biology.organism_classification ,Pollution ,Rhizoremediation ,Biodegradation, Environmental ,Petroleum ,Vegetable oil ,Agronomy ,Seedlings ,Seedling ,Rhizosphere ,Shoot ,Lotus ,Physical effects ,Environmental science ,Chemical toxicity ,Plant Shoots ,Research Article - Abstract
Petroleum contamination and its remediation via plant-based solutions have got increasing attention by environmental scientists and engineers. In the current study, the physiological and growth responses of two diesel-tolerant plant species (tolerance limit: 1500-2000 mg/kg), Italian ryegrass (Lolium multiflorum) and Birdsfoot trefoil (Lotus corniculatus), have been investigated in vegetable oil- and diesel oil-amended soils. A long-term (147-day) greenhouse pot experiment was conducted to differentiate the main focus of the study: physical and chemical effects of oil (vegetable and diesel) in freshly spiked soils via evaluating the plant performance and hydrocarbon degradation. Moreover, plant performance was evaluated in terms of seed germination, plant shoot biomass, physiological parameters, and root biomass. Addition of both diesel oil and vegetable oil in freshly spiked soils showed deleterious effects on seedling emergence, root/shoot biomass, and chlorophyll content of grass and legume plants. Italian ryegrass showed more sensitivity in terms of germination rate to both vegetable and diesel oil as compared to non-contaminated soils while Birdsfoot trefoil reduced the germination rate only in diesel oil-impacted soils. The results of the current study suggest that both physical and chemical effects of oil pose negative effects of plant growth and root development. This observation may explain the phenomenon of reduced plant growth in aged/weathered contaminated soils during rhizoremediation experiments.
- Published
- 2019
19. Evidence for nickel mobilisation in rhizosphere soils of Ni hyperaccumulator Odontarrhena serpyllifolia
- Author
-
Niklas J. Lehto, Ángeles Prieto-Fernández, Vanessa Álvarez-López, Walter W. Wenzel, C. Monterroso, Jakob Santner, Markus Puschenreiter, and P.S. Kidd
- Subjects
0106 biological sciences ,Rhizosphere ,Chemistry ,Bulk soil ,Soil Science ,Phytomining,Ni kinetics ,04 agricultural and veterinary sciences ,Plant Science ,Fractionation ,DGT ,01 natural sciences ,Diffusive gradients in thin films ,6. Clean water ,Serpentine soil ,Environmental chemistry ,Soil water ,040103 agronomy & agriculture ,Cation-exchange capacity ,0401 agriculture, forestry, and fisheries ,Hyperaccumulator ,Ni replenishment ,High resolution imaging ,010606 plant biology & botany - Abstract
Purpose: Rhizosphere processes are known to modify uptake of elements from soil, but limited information is available for hyperaccumulators. We investigated labile Ni fractions and their kinetics of replenishment in the rhizospheres of the Ni-hyperaccumulator Odontarrhena serpyliffolia, the Ni-excluder Holcus lanatus and in bulk soils collected at the same serpentine outcrop. Methods: Labile Ni fractions in rhizosphere and bulk soil were evaluated using conventional extractions and also by the Diffusive Gradients in Thin Films (DGT) technique. DGT data were used to predict the kinetics of Ni resupply using DIFS modelling. Chemical imaging of Ni distribution along roots using DGT coupled with laser-ablation was conducted. Results: Labile Ni forms were higher in both rhizosphere than in bulk soils, together with an increase in dissolved organic C, cation exchange capacity and the Ca/Mg ratio. Ni fractionation indicated a shift towards less stable Ni fractions in the rhizosphere, particularly in the hyperaccumulator. DIFS modelling showed that the rhizosphere of the excluder was able to sustain the initially lower soluble Ni concentration through replenishment from the solid phase, while Ni resupply in the rhizosphere of the hyperaccumulator was not sufficient to maintain the initially high concentrations of soluble Ni. However, the amount of DGT-labile Ni was higher in the rhizosphere of the hyperaccumulator compared to the excluder in all deployment times. Conclusion: Our data suggest that compounds derived from root activity, in particular DOC, are important controls of Ni availability to plants growing on serpentine soil.
- Published
- 2021
20. Heavy metal contents, mobility and origin in agricultural topsoils of the Galápagos Islands
- Author
-
Tamara C. Dinter, Paulina M. Couenberg, Martin H. Gerzabek, Franz Zehetner, Bjarne W. Strobel, and Markus Puschenreiter
- Subjects
China ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Ammonium nitrate ,Fauna ,0208 environmental biotechnology ,Weathering ,02 engineering and technology ,010501 environmental sciences ,Risk Assessment ,01 natural sciences ,Soil ,chemistry.chemical_compound ,Metals, Heavy ,Agricultural soils ,Soil Pollutants ,Environmental Chemistry ,0105 earth and related environmental sciences ,geography ,Trace elements ,geography.geographical_feature_category ,National park ,Public Health, Environmental and Occupational Health ,Trace element ,General Medicine ,General Chemistry ,Pollution ,Soil quality ,020801 environmental engineering ,Volcanic ash soils ,Lead ,chemistry ,Heavy metals ,Environmental chemistry ,Galápagos Islands ,Soil water ,Archipelago ,Environmental science ,Ecuador ,Aqua regia ,Cadmium ,Environmental Monitoring - Abstract
While the Galapagos Islands have been renowned for their unique flora and fauna since the time of Charles Darwin, the soils of the isolated island chain have been mostly overlooked and little information on their heavy metal contents is available. The aim of this study was therefore to examine the total heavy metal (Cd, Co, Cr, Cu, Ni, Pb, U, Zn) contents of soils from the agricultural areas on islands Isabela, Santa Cruz and San Cristobal, and identify trends with duration of exposure to weathering processes. Additionally, the mobility of these elements was assessed using ammonium nitrate extraction. In general, levels of Cd, Co, Cr, Cu, Ni and Zn were high compared to other world locations, while Pb levels were low and U levels were similar. Ni, Co, Cr, and to a lesser extent Pb and U tended to accumulate with increasing weathering duration. Soil concentrations of Cd, Zn, Cu, and possibly Pb and U, may have been influenced by use of agrochemicals, particularly on Santa Cruz Island. Mobility of Cd displayed an increasing trend with soil age, while Ni mobility decreased. Many soils had total contents of Cd, Co, Cr, Cu, Ni and Zn above threshold values indicating possible ecological or health risks. Systematic examination of trace element contents in soils from pristine national park areas would further assist in the delineation of background levels and the development of soil quality standards to ensure crop quality, animal and human health on this unique island chain.
- Published
- 2021
21. Millimeter-resolution mapping of citrate exuded from soil grown roots using a novel, low-invasive sampling technique
- Author
-
Raphael Tiziani, Tanja Mimmo, Erik Smolders, Markus Puschenreiter, Stefano Cesco, Jose Carlos Herrera, and Jakob Santner
- Subjects
Exudate ,Adsorption ,Chromatography ,Resolution (mass spectrometry) ,Chemistry ,Ionic strength ,Phosphorus ,Rhizotron ,medicine ,Sampling (statistics) ,chemistry.chemical_element ,medicine.symptom ,Diffusive gradients in thin films - Abstract
The reliable sampling of root exudates in soil grown plants is experimentally challenging. This study aimed at developing a citrate sampling and mapping technique with millimetre-resolution using DGT (diffusive gradients in thin films) ZrOH binding gels. Citrate adsorption kinetics, DGT capacity and stability of ZrOH gels were evaluated. ZrOH gels were applied to generate 2D maps of citrate exuded by white lupin roots grown in rhizotrosn in a phosphorus deficient soil. Citrate was adsorbed quantitatively and rapidly by the ZrOH gels, these gels can be stored after sampling for several weeks prior to analysis. The DGT capacity of the ZrOH gel for citrate depends on the ionic strength and the pH of the soil solution but was suitable for citrate sampling. 2D citrate maps of rhizotron grown plants have been generated for the first time at a millimetre resolution to measure an illustrated plant response to P fertilization. DGT-based citrate sampling is suitable for studying the root exudation in soil environments, at unprecedented spatial resolution. By changing binding material, the technique is also applicable to other exudate classes and might be used for the evaluation of whole root exudation crucial in specific cultivar breeding.HighlightWe present a novel, reliable, easy to use, non-destructive citrate sampling- and two-dimensional high-resolution imaging technique for soil grown plant roots.
- Published
- 2020
22. Element Case Studies in the Temperate/Mediterranean Regions of Europe: Nickel
- Author
-
Petra Kidd, Aida Bani, Dolja Pavlova, Dimitrios Kyrkas, Guillaume Echevarria, Markus Puschenreiter, Maria Konstantinou, Beatriz Garrido-Rodríguez, Jean Louis Morel, and Ángeles Prieto-Fernández
- Subjects
Mediterranean climate ,Crop ,Geography ,Agriculture ,business.industry ,Agroforestry ,Temperate climate ,Context (language use) ,Hyperaccumulator ,Arable land ,Weed ,business - Abstract
Initial experiments using Mediterranean Ni-hyperaccumulator plants for the purpose of phytomining were carried out in the 1990s. In order to meet commercial phytoextraction requirements, a technology has been developed using hyperaccumulator species with adapted intensive agronomic practices on naturally Ni-rich soils. Ultramafic soils in the Balkans and other parts of Europe display a great variability in Ni concentrations and available Ni levels. In Albania, Vertisols are currently being used for low-productivity agriculture (pasture or arable land) on which phytomining could be included in cropping practices. In northwestern Greece (Pindus and Vourinos mountain regions), agricultural soils may occur on ultramafic Cambisols. In Spain and Austria, these soils are much more erratically distributed and are seldom used for crops and pastures. In the Balkans, Odontarrhena chalcidica (synonym Alyssum murale) occurs widely on these ultramafic soils and is a spontaneous weed that grows among other crops. Field studies across Europe have now been carried out outside Mediterranean areas and have evaluated the Ni-hyperaccumulator O. chalcidica, as well as two other species native to northwestern Greece (Bornmuellera emarginata and B. tymphaea). At each site, local hyperaccumulator plants were tested for comparison (Noccaea goesingense in Austria and Odontarrhena serpyllifolia s.l. in Spain), in the context of two recent EUfunded projects (by Agronickel and LIFEAgromine). Soil and crop management practices are being developed in order to optimize the Ni agromining process. Field studies have evaluated the potential benefits of fertilization regimes, crop selection, and cropping patterns (introducing agroecological practices), and bioaugmentation using plant-associated microorganisms.
- Published
- 2020
23. Citrate sampling and 2D imaging from rhizotron grown roots with ZrOH DGT gels v1
- Author
-
raphael.tiziani not provided, Markus Puschenreiter, Erik Smolders, Tanja Mimmo, José Carlos Herrera, Stefano Cesco, and Jakob Santner
- Abstract
The reliable sampling of root exudates in soil grown plants is experimentally challenging. This method shows how to sample citrate from rhizotron grown plants with ZrOH DGT gels to produce high resolution citrate imaging. The DGT technique is based on thin hydrogels with homogeneously distributed analyte-selective binding phases and is used for 2D visualization and quantification of the distribution of labile (i.e., reversibly adsorbed) analytes.
- Published
- 2020
24. Comparative Genomics of Microbacterium Species to Reveal Diversity, Potential for Secondary Metabolites and Heavy Metal Resistance
- Author
-
K. Swarnalakshmi, Angela Sessitsch, Siegrid Widhalm, Christoph Höfer, Markus Puschenreiter, Günter Brader, Erika Corretto, and Livio Antonielli
- Subjects
Microbiology (medical) ,Siderophore ,siderophore ,polyketide synthases ,Microbacterium ,lcsh:QR1-502 ,comparative genomics ,Biology ,Secondary metabolite ,Microbiology ,lcsh:Microbiology ,03 medical and health sciences ,Polyketide ,terpenoids ,medicine ,Gene family ,heavy metals ,Gene ,Original Research ,030304 developmental biology ,Comparative genomics ,0303 health sciences ,Genetic diversity ,secondary metabolites ,030306 microbiology ,plant associated bacteria ,biology.organism_classification ,Biochemistry ,medicine.drug - Abstract
Microbacterium species have been isolated from a wide range of hosts and environments, including heavy metal-contaminated sites. Here, we present a comprehensive analysis on the phylogenetic distribution and the genetic potential of 70 Microbacterium belonging to 20 different species isolated from heavy metal-contaminated and non-contaminated sites with particular attention to secondary metabolites gene clusters. The analyzed Microbacterium species are divided in three main functional clades. They share a small core genome (331 gene families covering basic functions) pointing to high genetic diversity. The most common secondary metabolite gene clusters encode pathways for the production of terpenoids, type III polyketide synthases and non-ribosomal peptide synthetases, potentially responsible of the synthesis of siderophore-like compounds. In vitro tests showed that many Microbacterium strains produce siderophores, ACC deaminase, auxins (IAA) and are able to solubilize phosphate. Microbacterium isolates from heavy metal contaminated sites are on average more resistant to heavy metals and harbor more genes related to metal homeostasis (e.g., metalloregulators). On the other hand, the ability to increase the metal mobility in a contaminated soil through the secretion of specific molecules seems to be widespread among all. Despite the widespread capacity of strains to mobilize several metals, plants inoculated with selected Microbacterium isolates showed only slightly increased iron concentrations, whereas concentrations of zinc, cadmium and lead were decreased.
- Published
- 2020
25. Metal accumulation and rhizosphere characteristics of Noccaea rotundifolia ssp. cepaeifolia
- Author
-
Alireza Golestanifard, Jakob Santner, Walter W. Wenzel, Amal Aryan, and Markus Puschenreiter
- Subjects
Biogeochemical cycle ,010504 meteorology & atmospheric sciences ,Health, Toxicology and Mutagenesis ,010501 environmental sciences ,Toxicology ,01 natural sciences ,Plant Roots ,Metal ,Soil ,Botany ,Soil Pollutants ,Hyperaccumulator ,0105 earth and related environmental sciences ,Rhizosphere ,Chemistry ,Noccaea rotundifolia ,General Medicine ,Pollution ,Root foraging ,Biodegradation, Environmental ,Metals ,visual_art ,Shoot ,visual_art.visual_art_medium ,Plant species - Abstract
This work aimed to investigate the metal accumulation characteristics as well as biogeochemical changes in the rhizosphere and root foraging strategies of this plant species. Previous reports suggested that Noccaea rotundifolia ssp. cepaeifolia is a Zn, Cd and Pb hyperaccumulator. We used hydroponic, rhizobox and split-pot experiments for studying metal accumulation and related rhizosphere processes. Although this species accumulated up to 1250 mg Pb kg−1 and 27,000 mg Zn kg−1 in shoots, translocation factors
- Published
- 2020
26. Quantifying and mapping citrate exudation in soil-grown root systems
- Author
-
Jose Carlos Herrera, Tanja Mimmo, Stefano Cesco, Jakob Santner, Raphael Tiziani, Erik Smolders, and Markus Puschenreiter
- Subjects
Horticulture ,Chemistry ,Root system - Abstract
The determination of citrate exuded from soil-grown roots is very challenging due to its rapid microbial degradation and mineralization, sorption to the solid soil phase and ongoing release of organic molecules from organic matter breakdown. For this reason, our knowledge about citrate release is mainly based on experiments carried out in hydroponics. Results obtained in hydroponics cannot directly be transferred to soil-plant systems, as hydroponics represents an artificial environment. This study aimed to develop a localization and quantification technique for citrate exuded from soil-grown plant roots, based on diffusive gradients in thin film (DGT). Polyacrylamide gels containing precipitated zirconium hydroxide (ZrOH) were applied to the rhizosphere of soil grown plants, on which citrate is efficiently immobilized, thereby creating a zero sink to sample the citrate exuded from the roots. Citrate was eluted with 1 mL 0.5 mol L-1 NaOH from the ZrOH gel and quantified by ion chromatography. ZrOH gel discs were able to bind the citrate contained in 10 mL of 2.77 mg citrate L-1 solutions within a 4h uptake period. Elution efficiency was ~89%. ZrOH gel capacity at pH 8 was 200 µg per gel disc and 299 µg per gel disc at pH 4, which is sufficient to act as a zero sink for citrate released from plant roots. As a first exemplary method application, we grew white lupin plants in rhizotrons using a highly phosphorus deficient soil. ZrOH gel sheets were applied for 26 h onto cluster roots for citrate sampling following established DGT protocols. Gels were cut afterwards into 5×5 and 5×2 mm slices for obtaining a citrate exudation map. In both cases we were able to localize and quantify up to 7.89 µg citrate on individual gel slices, as well as to identify longitudinal and lateral citrate gradients around the cluster roots. Moreover, the characterization of ZrOH gels showed its suitability for citrate sampling in terms uptake kinetics and capacity. These results demonstrate that the developed method is suitable for citrate sampling and localization in a non-destructive way from soil-grown plant roots. As it is applicable to soil grown-roots and provides unprecedented spatial resolution, this sampling technique advances the experimental possibilities for researching root exudates considerably. Using suitable binding materials, this approach is also applicable to other carboxylates such as malate or oxalate and other compound classes such as phenolics, flavonolos etc. Furthermore, this technique can be combined with complementary imaging methods for mapping e.g. nutrients, contaminants, pH or enzyme activity distributions.
- Published
- 2020
27. Nickel phytomining from industrial wastes : Growing nickel hyperaccumulator plants on galvanic sludges
- Author
-
Markus Puschenreiter, Gaylord Erwan Machinet, Theresa Rosenkranz, Alice Tognacchini, Guillaume Echevarria, Antony van der Ent, Institute of Soil Research, Universität für Bodenkultur Wien [Vienne, Autriche] (BOKU), Sustainable Minerals Institute, Centre for Mined Land Rehabilitation (SMI-CMLR (UQ)), University of Queensland [Brisbane], Laboratoire Sols et Environnement (LSE), Université de Lorraine (UL)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), and Microhumus
- Subjects
Environmental Engineering ,0208 environmental biotechnology ,Biomass ,chemistry.chemical_element ,Industrial Waste ,02 engineering and technology ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,01 natural sciences ,Industrial waste ,Soil ,Ultramafic rock ,Nickel ,Soil Pollutants ,Hyperaccumulator ,Technosols ,Waste Management and Disposal ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,Sewage ,Agromining ,General Medicine ,020801 environmental engineering ,Phytoremediation ,Biodegradation, Environmental ,chemistry ,Environmental chemistry ,Soil water ,Shoot ,Brassicaceae ,[SDE]Environmental Sciences ,Odontarrhena chalcidica - Abstract
Nickel (Ni) is used in numerous industrial processes, with large amounts of Ni-rich industrial wastes produced, which are largely sent to landfill. Nickel recovery from waste materials that would otherwise be disposed is of particular interest. Nickel phytomining represents a new technology in which hyperaccumulator plants are cultivated on Ni-rich substrates for commercial metal recovery. The aim of this study was to investigate the possibility of Ni transfer from industrial waste into plant biomass, to support recovery processes from bio-ores. Different industrial galvanic sludges (containing 85–150 g kg−1 Ni) were converted into artificial substrates (i.e. technosols) and the Ni hyperaccumulator Odontarrhena chalcidica (formerly Alyssum murale) was cultivated on these Ni-rich matrices. A greenhouse pot experiment was conducted for three months including an ultramafic soil control and testing fertilized (NPK) and unfertilized replicates. The results showed that fertilization was effective in improving plant biomass for all the substrates and that O. chalcidica was capable of viably growing on technosols, producing a comparable biomass to O. chalcidica on the control (ultramafic soil). On all technosols, O. chalcidica achieved Ni shoot concentrations of more than >1000 mg Ni kg −1 and maximum Ni uptake was obtained from one of the technosols (26.8 g kg −1 Ni, unfertilized; 20.2 g kg −1 Ni, fertilized). Nickel accumulation from three of the technosols resulted to be comparable with the control ultramafic soil. This study demonstrated the feasibility of transferring Ni from toxic waste into the biomass of Odontarrhena chalcidica and that phytomining from galvanic sludge-derived technosols can provide similar Ni yields as from natural ultramafic soils.
- Published
- 2020
28. Rhizoremediation of petroleum hydrocarbon-contaminated soils: Improvement opportunities and field applications
- Author
-
Thomas G. Reichenauer, Markus Puschenreiter, Philipp Schöftner, Jabir Hussain Syed, Soja Gerhard, Sohail Yousaf, Imran Hussain, and Aijie Wang
- Subjects
Pollution ,Rhizosphere ,Environmental remediation ,media_common.quotation_subject ,Environmental engineering ,04 agricultural and veterinary sciences ,Plant Science ,010501 environmental sciences ,01 natural sciences ,Soil conditioner ,chemistry.chemical_compound ,Phytoremediation ,Bioremediation ,chemistry ,Soil water ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Petroleum ,Environmental science ,Agronomy and Crop Science ,Ecology, Evolution, Behavior and Systematics ,0105 earth and related environmental sciences ,media_common - Abstract
The remediation of petroleum hydrocarbon-contaminated soils has remained a challenging issue for environmental scientists and engineers. Within the scope of bioremediation; rhizoremediation has emerged as the most suitable method for petroleum-impacted soils. It can be promoted by the proper selection of suitable plant-microbe combinations and its overall efficiency can be enhanced by adding suitable soil amendments. This review article summarizes the available knowledge on rhizoremediation with respect to plant selection, inoculation with specific microbial strains (hydrocarbon-degrading as well as plant growth-promoting microbes) and a variety of soil amendments for enhancing the remediation efficiency. A large set of organic and inorganic soil amendments has been presented for the discussion on potential increase of rhizospheric effects. Finally, we discussed a unique multi-process phytoremediation system (MPPS) for the remediation of petroleum-polluted soils along with its field applications.
- Published
- 2018
29. Investigations of microbial degradation of polycyclic aromatic hydrocarbons based on 13C-labeled phenanthrene in a soil co-contaminated with trace elements using a plant assisted approach
- Author
-
Anna Jäger, Gerhard Soja, Markus Puschenreiter, Andrea Watzinger, Wolfgang Friesl-Hanl, Thomas G. Reichenauer, and Anna Wawra
- Subjects
Chemistry ,Environmental remediation ,Health, Toxicology and Mutagenesis ,Soil organic matter ,Soil classification ,04 agricultural and veterinary sciences ,General Medicine ,010501 environmental sciences ,complex mixtures ,01 natural sciences ,Pollution ,Soil contamination ,Soil conditioner ,Environmental chemistry ,Soil water ,Biochar ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental Chemistry ,Microbial biodegradation ,0105 earth and related environmental sciences - Abstract
Co-contaminations of soils with organic and inorganic pollutants are a frequent environmental problem. Due to their toxicity and recalcitrance, the heterogeneous pollutants may persist in soil. The hypothesis of this study was that degradation of polycyclic aromatic hydrocarbons (PAHs) is enhanced if heavy metals in soil are immobilized and their bioavailability reduced. For metal immobilization and enhanced biodegradation, distinct mineral and organic soil amendments (iron oxides, gravel sludge, biochar) were deployed in an incubation batch experiment. The second part of the experiment consisted of a greenhouse pot experiment applying fast-growing and pollution-tolerant woody plants (willow and black locust). Soil amendments initially immobilized NH4NO3-extractable zinc, cadmium, and lead; after 100 days of incubation, soil amendments showed reductions only for cadmium and a tendency to enhance arsenic mobility. In order to monitor the remediation success, a 13C-phenanthrene (PHE) label was applied. 13C-phospholipid fatty acid analysis (13C-PLFA) further enabled the identification of PHE-degrading soil microorganisms. Both experiments exhibited a similar PLFA profile. Gram-negative bacteria (esp. cy17:0, 16:1ω7 + 6, 18:1ω7c) were the most significant microbial group taking up 13C-PHE. Plants effectively increased the label uptake by gram-positive bacteria and increased the biomass of the fungal biomarker, although their contribution to the degradation process was minor. Plants tended to prolong PAH dissipation in soil; at the end of the experiment, however, all treatments showed equally low total PAH concentrations in soil. While black locust plants tended not to take up potentially toxic trace elements, willows accumulated them in their leaves. The results of this study show that the chosen treatments did not enhance the remediation of the experimental soil.
- Published
- 2017
30. Does the exudation of coumarins from Fe-deficient, soil-grown Brassicaceae species play a significant role in plant Fe nutrition?
- Author
-
Ricardo Fabiano Hettwer Giehl, Matthias Baune, Eva Oburger, Theresa Rosenkranz, Vanessa Paffrath, Andrea Sarashgi, and Markus Puschenreiter
- Subjects
0106 biological sciences ,Sinapis ,Brassica ,Soil Science ,chemistry.chemical_element ,Raphanus ,Plant Science ,01 natural sciences ,03 medical and health sciences ,chemistry.chemical_compound ,Scopoletin ,Trace metal ,030304 developmental biology ,2. Zero hunger ,0303 health sciences ,biology ,food and beverages ,Brassicaceae ,15. Life on land ,biology.organism_classification ,Horticulture ,chemistry ,Agronomy and Crop Science ,Carbon ,Calcareous ,010606 plant biology & botany - Abstract
The availability of iron (Fe) is highly limited for plant uptake in calcareous soils. To overcome this challenge, plants have developed different strategies of Fe mobilization. Non-gramineous species employ a reduction-based strategy (strategy I), which is assisted by the release of Fe(III)-chelating and -reducing coumarins. In this study, the coumarin release by three strategy-I plant species of the Brassicaceae family, i.e. Brassica napus L., Raphanus sativus L. and Sinapis alba L., on calcareous soil was examined using the RHIZOtest approach. With this experimental setup, the plants were first grown hydroponically in a cylindrical growth unit for 12 days, which was then subsequently brought in contact with calcareous, Fe deficient soil for another 9 days. Root exudates were collected in both experimental phases. Total carbon (C) release, coumarin exudation rates, trace metal plant uptake as well as trace metal mobilization were determined in response to Fe deficiency after 3, 6 and 9 days of soil exposure. High total C exudation rates indicated a clear stress response upon Fe deficiency during the soil contact period. Six different coumarins were detected, with scopoletin being predominantly released by all three plant species during the hydroponic stage with zero Fe supply. The exudation rate of all detected coumarins was significantly lower during soil exposure and represented only a very small fraction of the total organic compounds released. Although the role of coumarins in Fe mobilization is very complex and still not completely understood, it seems that coumarins are less important in Fe mobilization by the three investigated plant species when grown on soil compared to phytosiderophore-releasing strategy-II plants. Our data further indicate that plants growing on a Fe-deficient soil release less coumarins than in an artificial nutrient solution setup with zero Fe supply, which highlights the importance of determining root exudation rates from soil-grown plants, since data from hydroponic studies are likely not representative for soil-grown plants.
- Published
- 2021
31. Trace elements bioavailability to Triticum aestivum and Dendrobaena veneta in a multielement-contaminated agricultural soil amended with drinking water treatment residues
- Author
-
Silke Neu, E. Gert Dudel, Markus Puschenreiter, Ingo Müller, Rafał Gałązka, Grzegorz Siebielec, and Carsten Brackhage
- Subjects
Stratigraphy ,chemistry.chemical_element ,010501 environmental sciences ,engineering.material ,01 natural sciences ,Bioassay ,0105 earth and related environmental sciences ,Earth-Surface Processes ,Lime ,2. Zero hunger ,Cadmium ,biology ,Chemistry ,Earthworm ,Biotic Ligand Model ,food and beverages ,04 agricultural and veterinary sciences ,15. Life on land ,biology.organism_classification ,6. Clean water ,Bioavailability ,Soil conditioner ,Agronomy ,Environmental chemistry ,Soil water ,040103 agronomy & agriculture ,engineering ,0401 agriculture, forestry, and fisheries - Abstract
The in situ stabilization of multielement-contaminated agricultural soils has limited effectiveness when using common single amendments. This study examined the use of drinking water treatment residues (WTR), based on (hydr)oxides of Fe, Al, or Mn, as a cost-effective solution to optimize the immobilization of metals (Cd, Pb, Zn) and As. Trace elements (TE) bioavailability was assessed under semi-controlled conditions in a pot study cultivating winter wheat (Triticum aestivum L. cv. Tiger) until maturity. An Fe-based WTR and a Mn-based WTR, applied at rates of 0.5 and 1% (m/m), were related to effects of lime marl (LM) application. Additionally, a bioassay with earthworms (Dendrobaena veneta) was conducted. Both bioassays were compared with measurements of NH4NO3-soluble, diffusive gradients in thin film (DGT)-available and soil solution TE concentrations, representing well-established surrogates for mimicking the bioavailable element fractions in soil. The application of the Fe-based WTR reduced As accumulation in vegetative wheat tissues (by up to 75%) and earthworms (by up to 41%), which corresponded with the findings from soil chemical analyses and improved plant growth and earthworm body weight. However, As concentrations in cereal grains were not affected, Cd or Pb accumulation by wheat was not mitigated, and Zn uptake was enhanced. By contrast, the Mn-based WTR effected the greatest reduction in Pb uptake, and lowered Cd transfer to wheat grain (by up to 25%). Neither the NH4NO3-soluble nor DGT-available concentrations matched with Cd and Zn accumulation in plants or earthworms, indicating interferences due to competition for binding sites according to the biotic ligand model. The results obtained in this study suggest that a bioassay with key species prior to field application should be mandatory when designing in situ stabilization options. The application of WTR to an agricultural soil strongly affected TE bioavailability to plants and earthworms. Low application rates tended to improve biomass production of biota. Higher application rates involved risks (e.g., P fixation, TE inputs), and none of the amendments tested could immobilize all targeted elements.
- Published
- 2017
32. Phytosiderophore-induced mobilization and uptake of Cd, Cu, Fe, Ni, Pb and Zn by wheat plants grown on metal-enriched soils
- Author
-
Y. Schindlegger, Walter W. Wenzel, Eva Oburger, Stephan Hann, Stephan M. Kraemer, Markus Puschenreiter, Walter D. C. Schenkeveld, Barbara Gruber, and Bernhard Spangl
- Subjects
0106 biological sciences ,Rhizosphere ,Chemistry ,food and beverages ,Plant Science ,010501 environmental sciences ,01 natural sciences ,Metal ,Agronomy ,Solubilization ,Environmental chemistry ,visual_art ,Shoot ,Soil water ,visual_art.visual_art_medium ,Bioassay ,Agronomy and Crop Science ,Batch extraction ,Ecology, Evolution, Behavior and Systematics ,Metal mobilization ,010606 plant biology & botany ,0105 earth and related environmental sciences - Abstract
We investigated to which extent phytosiderophores (PS), released by grasses for the acquisition of iron, solubilize other metals in contaminated soils, and how this affects metal mobilization and uptake in wheat plants. A plant-based bioassay (‘RHIZOtest’) and batch extraction scheme were carried out for assessing metal mobilisation in soil, PS exudation and metal accumulation in wheat. Increased PS exudation was observed in Fe-deficient wheat, leading to enhanced Zn, Cu, Mn and Ni concentrations in wheat shoots on some soils. In contrast, plant Cd and Pb concentrations were not affected. Likewise, in the batch experiment, strongly increased extractable Cu, Ni and Zn concentrations were observed, in particular when 100 or 1000 μM PS were added. Our results suggest that Fe deficiency can enhance the accumulation of some metals in shoots of grass species. Although our results indicate that the risk of enhanced accumulation of Cd and Pb in Fe deficient wheat shoots is rather small, further experiments conducted on soil for the complete vegetation period would be needed to confirm this observation.
- Published
- 2017
33. Waste or substrate for metal hyperaccumulating plants — The potential of phytomining on waste incineration bottom ash
- Author
-
Johannes Kisser, Markus Puschenreiter, Theresa Rosenkranz, and Walter W. Wenzel
- Subjects
Environmental Engineering ,Municipal solid waste ,biology ,Waste management ,Biomass ,Context (language use) ,04 agricultural and veterinary sciences ,010501 environmental sciences ,biology.organism_classification ,01 natural sciences ,Pollution ,Incineration ,Phytoremediation ,Bottom ash ,Environmental chemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental Chemistry ,Environmental science ,Alyssum ,Hyperaccumulator ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
Phytomining could represent an innovative low-cost technology for the selective recovery of valuable trace elements from secondary resources. In this context the potential of phytomining from waste incineration bottom ash was tested in a pot experiment. Fresh bottom ash was acidified, leached to reduce salinity and amended with organic material to obtain a suitable substrate for plant growth. Two hyperaccumulator species, Alyssum serpyllifolium subsp. lusitanicum and Sedum plumbizincicola as well as three metal tolerant species, Brassica napus, B. juncea and Nicotiana tabacum were tested for their phytomining potential on the pre-treated and amended bottom ashes from municipal solid waste and hazardous waste incineration. The hyperaccumulators had severe difficulties to establish on the bottom ash and to produce sufficient biomass, likely due to salinity and Cu toxicity. Nevertheless, concentrations of Ni in A. serpyllifolium and Zn in S. plumbizincicola were high, but total metal removal was limited by the low biomass production and was clearly less than on metalliferous soils. The Brassica species proved to be more tolerant to salinity and high Cu concentrations and produced considerably higher biomass, but total metal removal was limited by rather low shoot concentrations. The observed limitations of the phytomining process along with currently low market prices of Ni and Zn suggest that further optimisation of the process is required in order to make phytomining economically feasible on the tested waste incineration bottom ashes.
- Published
- 2017
34. Comment on: S. Nawara, T. Van Dael, R. Merckx, F. Amery, A. Elsen, W. Odeurs, H. Vandendriessche, S. McGrath, C. Roisin, C. Jouany, S. Pellerin, P. Denoroy, B. Eichler-Löbermann, G. Börjesson, P. Goos, W. Akkermans & E. Smolders. A comparison of soil test
- Author
-
Jakob Santner, Markus Puschenreiter, Walter W. Wenzel, and Olivier Duboc
- Subjects
Soil test ,Field (physics) ,Phosphorus ,Soil Science ,chemistry.chemical_element ,04 agricultural and veterinary sciences ,010501 environmental sciences ,01 natural sciences ,Term (time) ,Animal science ,chemistry ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,0105 earth and related environmental sciences - Published
- 2018
35. Phytomanagement with grassy species, compost and dolomitic limestone rehabilitates a meadow at a wood preservation site
- Author
-
Aritz Burges, Lilian Marchand, Nadège Oustriere, José María Becerril, Michel Mench, Eric Paidjan, Markus Puschenreiter, Clémence M. Bes, María A. Galende, Biodiversité, Gènes & Communautés (BioGeCo), Université de Bordeaux (UB)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), University of the Basque Country [Bizkaia] (UPV/EHU), and Universität für Bodenkultur Wien [Vienne, Autriche] (BOKU)
- Subjects
Agrostis capillaris ,Environmental Engineering ,Biodiversity ,Amendment ,010501 environmental sciences ,Management, Monitoring, Policy and Law ,engineering.material ,01 natural sciences ,Soil functions ,Revegetation ,Organic amendments ,0105 earth and related environmental sciences ,Nature and Landscape Conservation ,2. Zero hunger ,Pollutant ,Compost ,Metal pollution ,04 agricultural and veterinary sciences ,15. Life on land ,Agrostis gigantea ,Phytoremediation ,Agronomy ,13. Climate action ,Phytotoxicity ,[SDE]Environmental Sciences ,Soil water ,040103 agronomy & agriculture ,engineering ,0401 agriculture, forestry, and fisheries ,Environmental science - Abstract
International audience; Brownfield surface is expanding in Europe, but as often abandoned or underused, these areas become refuge for microbial, faunal and floral biodiversity. However, brownfield sites are generally contaminated, likely posing severe environmental risks. At a former wood preservation site contaminated with Cu, we evaluated the efficiency of compost and dolomitic limestone incorporation into the soil, followed by revegetation with Cu-tolerant grassy species, as a phytomanagement option to increase vegetation cover and plant diversity while reducing pollutant linkages. 7 years of phytomanagement enhanced natural revegetation through the improvement of soil physicochemical properties, particularly with compost-based amendments. The compost incorporation increased soil Cu solubility; however, no increment in Cu availability and a reduction in Cu-induced phytotoxicity were observed with the compost. The improved soil nutrient availability and the soil phytotoxicity mitigation in compost-amended soils facilitated over the 7 years the growth of beneficial plant colonists, including leguminous species, which can potentially promote essential soil functions. Soil treatments did not affect Cu uptake and translocation by plants and shoot Cu levels indicated no risk for the food chain. Overall, a long-term phytomanagement combining an initial amendment of compost and dolomitic limestone with the cultivation of Cu-tolerant grassy populations can ameliorate such Cu-contaminated soils, by mitigating risks induced by Cu excess, ultimately allowing the development of a meadow that can provide ecological and economic benefits in terms of ecosystem services.Agrostis capillaris; Agrostis gigantea; Metal pollution; Organic amendments; Phytotoxicity; Phytoremediation
- Published
- 2021
36. Transcriptome Response of Metallicolous and a Non-Metallicolous Ecotypes of Noccaea goesingensis to Nickel Excess
- Author
-
Katarzyna Turnau, Magdalena Hubalewska-Mazgaj, Roman J. Jędrzejczyk, Agnieszka Domka, Cristina Gonnelli, Federico Martinelli, Jubina Benny, Rafał Ważny, Piotr Rozpądek, and Markus Puschenreiter
- Subjects
0106 biological sciences ,0301 basic medicine ,Noccaea goesingensis ,Population ,ecotypes ,chemistry.chemical_element ,Plant Science ,Biology ,01 natural sciences ,Article ,Shoot biomass ,Transcriptome ,03 medical and health sciences ,lcsh:Botany ,nickel (Ni) ,Botany ,education ,Gene ,Ecology, Evolution, Behavior and Systematics ,education.field_of_study ,tolerance ,Ecology ,Ecotype ,Ethylene metabolism ,lcsh:QK1-989 ,Nickel ,030104 developmental biology ,chemistry ,Shoot ,transcriptome ,010606 plant biology & botany - Abstract
Root transcriptomic profile was comparatively studied in a serpentine (TM) and a non-metallicolous (NTM) population of Noccaea goesingensis in order to investigate possible features of Ni hyperaccumulation. Both populations were characterised by contrasting Ni tolerance and accumulation capacity. The growth of the TM population was unaffected by metal excess, while the shoot biomass production in the NTM population was significantly lower in the presence of Ni in the culture medium. Nickel concentration was nearly six- and two-fold higher in the shoots than in the roots of the TM and NTM population, respectively. The comparison of root transcriptomes using the RNA-seq method indicated distinct responses to Ni treatment between tested ecotypes. Among differentially expressed genes, the expression of IRT1 and IRT2, encoding metal transporters, was upregulated in the TM population and downregulated/unchanged in the NTM ecotype. Furthermore, differences were observed among ethylene metabolism and response related genes. In the TM population, the expression of genes including ACS7, ACO5, ERF104 and ERF105 was upregulated, while in the NTM population, expression of these genes remained unchanged, thus suggesting a possible regulatory role of this hormone in Ni hyperaccumulation. The present results could serve as a starting point for further studies concerning the plant mechanisms responsible for Ni tolerance and accumulation.
- Published
- 2020
37. Nickel Biogeochemistry at the Soil–Plant Interface
- Author
-
Walter W. Wenzel, Petra Kidd, Theresa Rosenkranz, and Markus Puschenreiter
- Subjects
Nickel ,Materials science ,chemistry ,Interface (Java) ,Metallurgy ,Biogeochemistry ,chemistry.chemical_element - Published
- 2018
38. Response of Plantago major to cesium and strontium in hydroponics: Absorption and effects on morphology, physiology and photosynthesis
- Author
-
Marieluise Weidinger, Markus Puschenreiter, Wolfram Adlassnig, Irene Lichtscheidl, and Anna Burger
- Subjects
010504 meteorology & atmospheric sciences ,Health, Toxicology and Mutagenesis ,Potassium ,Cesium ,chemistry.chemical_element ,010501 environmental sciences ,Toxicology ,Photosynthesis ,Plant Roots ,01 natural sciences ,chemistry.chemical_compound ,Hydroponics ,Strontium nitrate ,Soil Pollutants, Radioactive ,Plantago ,Chlorophyll fluorescence ,Inductively coupled plasma mass spectrometry ,0105 earth and related environmental sciences ,Strontium ,Nitrates ,Chemistry ,General Medicine ,Pollution ,Plant Leaves ,Chlorophyll ,Environmental chemistry ,Calcium - Abstract
Human activities lead to increasing concentration of the stable elements cesium (Cs) and strontium (Sr) and their radioactive isotopes in the food chain, where plants play an important part. Here we investigated Plantago major under the influence of long-term exposure to stable Cs and Sr. The plants were cultivated hydroponically in different concentrations of cesium sulfate (between 0.002 and 20 mM) and strontium nitrate (between 0.001 and 100 mM). Uptake of Cs and Sr into leaves was analyzed from extracts by inductively coupled plasma mass spectrometry (ICP-MS). It was increased with increasing external Cs and Sr concentrations. However, the efficiency of Cs and Sr transfer from solution to plants was higher for low external concentrations. Highest transfer factors were 6.78 for Cs and 71.13 for Sr. Accumulation of Sr was accompanied by a slight decrease of potassium (K) and calcium (Ca) in leaves, whereas the presence of Cs in the medium affected only uptake of K. The toxic effects of Cs and Sr were estimated from photosynthetic reactions and plant growth. In leaves, Cs and Sr affected the chlorophyll fluorescence even at their low concentrations. Low and high concentrations of both ions reduced dry weight and length of roots and leaves. The distribution of the elements between the different tissues of leaves and roots was investigated using Energy Dispersive X-Ray microanalysis (EDX) with scanning electron microscope (SEM). Overall, observations suggested differential patterns in accumulating Cs and Sr within the roots and leaves. When present in higher concentrations the amount of Cs and Sr transferred from environment to plants was sufficient to affect some physiological processes. The experimental model showed a potential for P. major to study the influence of radioactive contaminants and their removal from hotspots.
- Published
- 2019
39. Developing Sustainable Agromining Systems in Agricultural Ultramafic Soils for Nickel Recovery
- Author
-
Petra Susan Kidd, Aida Bani, Emile Benizri, Cristina Gonnelli, Claire Hazotte, Johannes Kisser, Maria Konstantinou, Tom Kuppens, Dimitris Kyrkas, Baptiste Laubie, Robert Malina, Jean-Louis Morel, Hakan Olcay, Tania Pardo, Marie-Noëlle Pons, Ángeles Prieto-Fernández, Markus Puschenreiter, Celestino Quintela-Sabarís, Charlene Ridard, Beatriz Rodríguez-Garrido, Theresa Rosenkranz, Piotr Rozpądek, Ramez Saad, Federico Selvi, Marie-Odile Simonnot, Alice Tognacchini, Katarzyna Turnau, Rafal Ważny, Nele Witters, Guillaume Echevarria, AE Department, Agricultural University of Tirana, Laboratoire Sols et Environnement (LSE), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), Universtiy of Florence, Laboratoire Réactions et Génie des Procédés (LRGP), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Technological Educational Institute of Eastern Macedonia and Thrace, University of Natural Resources and Applied Life Sciences (BOKU), Università degli Studi di Firenze [Firenze], Hasselt University, Multidisciplinair Inst. Lerarenopleiding, Teacher Education, Centre National de la Recherche Scientifique (CNRS)-Université de Lorraine (UL), University of Natural Resources and Life Sciences (BOKU), Università degli Studi di Firenze = University of Florence [Firenze] (UNIFI), Hasselt University (UHasselt), and LIFE15 ENV/FR/000512 / ERA-NET FACCE Surplus / ANR15-SUSF-0003-RA/ PCIN-2017-028 / FACCE SURPLUS/I/AGRONICKEL/02/2016
- Subjects
hydrometallurgy ,Odontarrhena ,Biomass ,010501 environmental sciences ,01 natural sciences ,Alyssum murale, Balkan Peninsula, Leptoplax emarginata, nickel, phytomining, serpentine soils ,Leptoplax emarginata ,serpentine soils ,Environmental protection ,Hydrometallurgy ,Hyperaccumulator ,lcsh:Environmental sciences ,ComputingMilieux_MISCELLANEOUS ,0105 earth and related environmental sciences ,General Environmental Science ,lcsh:GE1-350 ,2. Zero hunger ,biology ,business.industry ,phytomining ,04 agricultural and veterinary sciences ,15. Life on land ,biology.organism_classification ,Phytoremediation ,13. Climate action ,Sustainable management ,Agriculture ,Alyssum s.l ,Soil water ,[SDE]Environmental Sciences ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science ,Alyssum ,Soil fertility ,business - Abstract
International audience; Ultramafic soils are typically enriched in nickel (Ni), chromium (Cr), and cobalt (Co) and deficient in essential nutrients, making them unattractive for traditional agriculture. Implementing agromining systems in ultramafic agricultural soils represent an ecological option for the sustainable management and re-valorisation of these low-productivity landscapes. These novel agroecosystems cultivate Ni-hyperaccumulating plants which are able to bioaccumulate this metal in their aerial plant parts; harvested biomass can be incinerated to produce Ni-enriched ash or “bio-ore” from which Ni metal, Ni ecocatalysts or pure Ni salts can be recovered. Nickel hyperaccumulation has been documented in ∼450 species, and in temperate latitudes these mainly belong to the family Brassicaceae and particularly to the genus Odontarrhena (syn. Alyssum pro parte). Agromining allows for sustainable metal recovery without causing the environmental impacts associated with conventional mining activities, and at the same time, can improve soil fertility and quality and provide essential ecosystem services. Parallel reductions in Ni phytotoxicity over time would also permit cultivation of conventional agricultural crops. Field studies in Europe have been restricted to Mediterranean areas and these only evaluated the Ni-hyperaccumulator Odontarrhena muralis s.l. Two recent EU projects (Agronickel and LIFE-Agromine) have established a network of agromining field sites in ultramafic regions with different edapho-climatic characteristics across Albania, Austria, Greece and Spain. Soil and crop management practices are being developed so as to Kidd et al. Sustainable Agromining Systems for Nickel Recovery optimize the Ni agromining process; field studies are evaluating the potential benefits of fertilization regimes, crop selection and cropping patterns, and bioaugmentation with plant-associated microorganisms. Hydrometallurgical processes are being up-scaled to produce nickel compounds and energy from hyperaccumulator biomass. Exploratory techno-economic assessment of Ni metal recovery by pyrometallurgical conversion of O. muralis s.l. shows promising results under the condition that heat released during incineration can be valorized in the vicinity of the processing facility.
- Published
- 2018
40. Long-term soil accumulation of potentially toxic elements and selected organic pollutants through application of recycled phosphorus fertilizers for organic farming conditions
- Author
-
Kurt Möller, Lina Weissengruber, Jürgen K. Friedel, and Markus Puschenreiter
- Subjects
2. Zero hunger ,Pollutant ,Biosolids ,Composting and manuring ,Soil Science ,04 agricultural and veterinary sciences ,010501 environmental sciences ,engineering.material ,01 natural sciences ,6. Clean water ,Soil quality ,13. Climate action ,Environmental chemistry ,Soil pH ,Digestate ,Soil water ,040103 agronomy & agriculture ,Organic farming ,engineering ,0401 agriculture, forestry, and fisheries ,Environmental science ,Fertilizer ,Leaching (agriculture) ,Agronomy and Crop Science ,0105 earth and related environmental sciences - Abstract
The pollutant input and the risk of contamination by long-term application of recycled P fertilizers (RPFs) in European agricultural soils were estimated by a mass balance approach. Calculations based on literature data were carried out for the potentially toxic elements (PTEs) Cd, Cr, Cu, Ni, Pb, Zn and for the persistent organic pollutants (POPs) PCBs, PAHs and polychlorinated dibenzo-dioxins and -furans. The PTE accumulation estimation during 200 years of fertilizer application, equivalent to 11 kg P ha−1 year−1, the mean P export via harvested products on European stockless organic farms, regarded soil background concentrations and proposed threshold concentrations. For PTEs, inputs were fertilizer application, atmospheric deposition and liming, output processes were leaching and crop harvest. The effect of varying site conditions was assessed by considering two precipitation excess (F) values and two soil pH values. For POPs, fertilizer application and the half-life time were considered. The PTE accumulation risk was low for most RPFs. For the analysed POPs no accumulation was found. The highest accumulation was found for all PTEs at pH 7 and F = 0.1 m year−1, the lowest at pH 5 and F = 0.3 m year−1. A high P concentration in fertilizers resulted in a low PTE flow per unit of P. Composts had the highest PTE accumulation risk due to lowest P contents. Struvite, meat and bone meal, digestate of catering waste, ash and biosolids would be better suited as P fertilizers. The use of fertilizers should be regulated based on their pollutant-to-nutrient ratio.
- Published
- 2018
41. Assessing phytotoxicity of trace element-contaminated soils phytomanaged with gentle remediation options at ten European field trials
- Author
-
Grzegorz Siebielec, Petra Kidd, Jolien Janssen, Andrew B. Cundy, Rolf Herzig, Aliaksandr Kolbas, Celestino Quintela-Sabarís, Markus Puschenreiter, William Galland, Wolfgang Friesl-Hanl, Michel Mench, Jaco Vangronsveld, Rafał Gałązka, Silke Neu, Jurate Kumpiene, Nadège Oustriere, Lilian Marchand, Ingo Müller, Valérie Bert, Ioannis Dimitriou, Biodiversité, Gènes & Communautés (BioGeCo), Institut National de la Recherche Agronomique (INRA)-Université de Bordeaux (UB), Spanish National Research Council (CSIC), Universität für Bodenkultur Wien = University of Natural Resources and Life [Vienne, Autriche] (BOKU), Saxon State Office for Environment, Agriculture and Geology, Hasselt University (UHasselt), Institut National de l'Environnement Industriel et des Risques (INERIS), European Project: 609398,EC:FP7:PEOPLE,FP7-PEOPLE-2013-COFUND,AGREENSKILLSPLUS(2014), Université de Bordeaux (UB)-Institut National de la Recherche Agronomique (INRA), University of Natural Resources and Applied Life Sciences (BOKU), Hasselt University, and University of Natural Resources and Life Sciences (BOKU)
- Subjects
0106 biological sciences ,CHLOROPHYLL FLUORESCENCE ,Environmental Engineering ,Environmental remediation ,LETTUCE ,GREENLAND PROJECT ,010501 environmental sciences ,engineering.material ,01 natural sciences ,BIOMASS ,phytoextraction ,phytostabilisation ,Environmental Chemistry ,PHYTOEXTRACTION ,Waste Management and Disposal ,0105 earth and related environmental sciences ,2. Zero hunger ,Topsoil ,biomass ,chlorophyll fluorescence ,Compost ,15. Life on land ,Pollution ,Soil contamination ,6. Clean water ,GREENLAND project ,lettuce ,Phytoremediation ,Agronomy ,Soil water ,Shoot ,PHYTOSTABILISATION ,[SDE]Environmental Sciences ,engineering ,Environmental science ,Phytotoxicity ,010606 plant biology & botany - Abstract
Gentle remediation options (GRO), i.e. in situ stabilisation, (aided) phytoextraction and (aided) phytostabilisation, were implemented at ten European sites contaminated with trace elements (TE) from various anthropogenic sources: mining, atmospheric fallout, landfill leachates, wood preservatives, dredged-sediments, and dumped wastes. To assess the performance of the GRO options, topsoil was collected from each field trial, potted, and cultivated with lettuce (Lactuca sativa L.) for 48 days. Shoot dry weight (DW) yield, photosynthesis efficiency and major element and TE concentrations in the soil pore water and lettuce shoots were measured.GRO implementation had a limited effect on TE concentrations in the soil pore water, although use of multivariate Co-inertia Analysis revealed a clear amelioration effect in phytomanaged soils. Phytomanagement increased shoot DW yield at all industrial and mine sites, whereas in agricultural soils improvements were produced in one out of five sites. Photosynthesis efficiency was less sensitive than changes in shoot biomass and did not discriminate changes in soil conditions.Based on lettuce shoot DW yield, compost amendment followed by phytoextraction yielded better results than phytostabilisation; moreover shoot ionome data proved that, depending on initial soil conditions, recurrent compost application may be required to maintain crop production with common shoot nutrient concentrations.
- Published
- 2017
42. Effect of nano zero-valent iron application on As, Cd, Pb, and Zn availability in the rhizosphere of metal(loid) contaminated soils
- Author
-
Martina Vítková, Michael Komárek, and Markus Puschenreiter
- Subjects
Environmental Engineering ,Soil test ,Health, Toxicology and Mutagenesis ,Iron ,0211 other engineering and technologies ,Bulk soil ,Biological Availability ,02 engineering and technology ,010501 environmental sciences ,01 natural sciences ,Plant Roots ,Arsenic ,Metals, Heavy ,Lolium ,Environmental Chemistry ,Soil Pollutants ,Environmental Restoration and Remediation ,0105 earth and related environmental sciences ,021110 strategic, defence & security studies ,Zerovalent iron ,Rhizosphere ,Chemistry ,Public Health, Environmental and Occupational Health ,Soil classification ,Sorption ,General Medicine ,General Chemistry ,Pollution ,Trace Elements ,Phytoremediation ,Zinc ,Lead ,Environmental chemistry ,Soil water ,Helianthus ,Environmental Pollution ,Cadmium - Abstract
Characterisation of geochemical transformations and processes in soils with special focus on the rhizosphere is crucial for assessing metal(loid) bioavailability to plants during in situ immobilisation and phytostabilisation. In this study, the effects of nano zero-valent iron (nZVI) were investigated in terms of the immobilisation of As, Zn, Pb and Cd in two soil types and their potential uptake by plants using rhizobox experiments. Such system allowed monitoring the behaviour of trace elements in rooted and bulk soil compartments separately. Sunflower (Helianthus annuus L.) and ryegrass (Lolium perenne L.) were tested for As-rich (15.9 g As kg−1) and Zn-rich (4.1 g Zn kg−1) soil samples, respectively. The application of nZVI effectively lowered the uptake of all target risk elements into plant tissues. Efficient immobilisation of As was determined in the As-soil without a significant difference between plant and bulk soil compartments. Similarly, a significant decrease was determined for CaCl2-available fractions of Zn, Pb and Cd in nZVI-treated Zn-soil. The behaviour of As corresponded to changes in Eh, while Zn and Cd showed to be mainly pH-dependent. However, despite the observed stabilisation effect of nZVI, high amounts of As and Zn still remained available for plants. Furthermore, the accumulation of the target risk elements in roots and the overall effect of nZVI transformations in the rhizosphere were verified and visualised by SEM/EDS. The following immobilising mechanisms were suggested: (i) sorption onto both existing and newly formed Fe (hydr)oxides, (ii) formation of secondary Fe-As phases, and (iii) sorption onto Mn (hydr)oxides.
- Published
- 2017
43. Degradation of polycyclic aromatic hydrocarbons in a mixed contaminated soil supported by phytostabilisation, organic and inorganic soil additives
- Author
-
Thomas G. Reichenauer, Wolfgang Friesl-Hanl, Anna Wawra, Gerhard Soja, Markus Puschenreiter, Andrea Watzinger, and Caroline Roithner
- Subjects
Environmental Engineering ,Environmental remediation ,04 agricultural and veterinary sciences ,010501 environmental sciences ,Phenanthrene ,complex mixtures ,01 natural sciences ,Pollution ,Soil contamination ,Soil conditioner ,Phytoremediation ,chemistry.chemical_compound ,chemistry ,Environmental chemistry ,Soil pH ,Biochar ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental Chemistry ,Microbial biodegradation ,Waste Management and Disposal ,0105 earth and related environmental sciences - Abstract
In soil, mixed contamination with potentially toxic trace elements and polycyclic aromatic hydrocarbons (PAHs) may persist for a long time due to strong adsorption to the soil matrix and to its toxicity to microorganism. We conducted an incubation batch experiment to test the effect of soil amendments (biochar, gravel sludge, iron oxides) on the immobilisation of trace elements. To monitor microbial degradation, a 13C-PHE (phenanthrene) label was introduced to soil for 13C-PLFA (phospholipid fatty acid) analysis. Soil amendments increased soil pH, reduced mobility of NH4NO3-extractable trace elements Cd and Zn, and increased mobile Cu. A small consortium of PHE degraders was identified mainly in the microbial groups of gram-negative bacteria and actinomycetes. The degradation process of PHE peaked 9days after incubation start. PAH concentrations remained constant in the soil within the 30-day incubation, except for the easily available 13C-PHE in the amended treatment. In order to test the effect of plants and soil amendments under more realistic conditions, we also conducted an outdoor pot experiment with black locust (Robinia pseudoacacia Nyirsegi). Furthermore, soil amendments increased the mobility of soil Cu and As and decreased the mobility of Cd, Pb and Sb. The uptake of trace elements to leaves was low. Σ 16 U.S. EPA PAHs were significantly reduced only in the combined treatment of black locust and soil amendments after 12months of plant growth. Soil amendment-assisted phytoremediation showed a high efficiency in PAH dissipation and may be a useful remediation technique for mixed contaminated soils.
- Published
- 2017
44. Developing Effective Decision Support for the Application of 'Gentle' Remediation Options: The GREENLAND Project
- Author
-
Jaco Vangronsveld, Valérie Bert, Wolfgang Friesl-Hanl, Michel Mench, Markus Puschenreiter, Nele Weyens, Paul Bardos, Andrew B. Cundy, Nele Witters, and Ingo Müller
- Subjects
Decision support system ,Environmental Engineering ,Operations research ,business.industry ,Computer science ,media_common.quotation_subject ,Stakeholder ,Stakeholder engagement ,Context (language use) ,Pollution ,12. Responsible consumption ,Risk analysis (engineering) ,Economic cost ,Sustainability ,business ,Function (engineering) ,Waste Management and Disposal ,Risk management ,media_common - Abstract
Gentle remediation options (GRO) are risk management strategies/technologies that result in a net gain (or at least no gross reduction) in soil function as well as risk management. They encompass a number of technologies, including the use of plant (phyto-), fungi (myco-), and/or bacteria-based methods, with or without chemical soil additives or amendments, for reducing contaminant transfer to local receptors by in situ stabilization, or extraction, transformation, or degradation of contaminants. Despite offering strong benefits in terms of risk management, deployment costs, and sustainability for a range of site problems, the application of GRO as practical on-site remedial solutions is still in its relative infancy, particularly for metal(loid)-contaminated sites. A key barrier to wider adoption of GRO relates to general uncertainties and lack of stakeholder confidence in (and indeed knowledge of) the feasibility or reliability of GRO as practical risk management solutions. The GREENLAND project has therefore developed a simple and transparent decision support framework for promoting the appropriate use of gentle remediation options and encouraging participation of stakeholders, supplemented by a set of specific design aids for use when GRO appear to be a viable option. The framework is presented as a three phased model or Decision Support Tool (DST), in the form of a Microsoft Excel-based workbook, designed to inform decision-making and options appraisal during the selection of remedial approaches for contaminated sites. The DST acts as a simple decision support and stakeholder engagement tool for the application of GRO, providing a context for GRO application (particularly where soft end-use of remediated land is envisaged), quick reference tables (including an economic cost calculator), and supporting information and technical guidance drawing on practical examples of effective GRO application at trace metal(loid) contaminated sites across Europe. This article introduces the decision support framework. ©2015 Wiley Periodicals, Inc.
- Published
- 2015
45. Free metal ion availability is a major factor for tolerance and growth in Physcomitrella patens
- Author
-
Irene Lichtscheidl, Ingeborg Lang, Mario Leyvas, Stefan Sassmann, Markus Puschenreiter, Edwin Julio Palomino Cadenas, and Wolfram Adlassnig
- Subjects
Cadmium ,Aqueous solution ,Metal ions in aqueous solution ,Inorganic chemistry ,chemistry.chemical_element ,Ethylenediaminetetraacetic acid ,Plant Science ,Zinc ,Copper ,Metal ,chemistry.chemical_compound ,chemistry ,visual_art ,Environmental chemistry ,visual_art.visual_art_medium ,Chelation ,Agronomy and Crop Science ,Ecology, Evolution, Behavior and Systematics - Abstract
Metal rich sites are populated by only a few specialized vascular plant species allowing less competitive bryophytes to inhabit these ecological niches. On such sites, many different stress factors may interact with the plants and foreclose statements on the individual effects of a single factor, therefore the means for this tolerance are difficult to investigate. This study uses the cultivation of the moss Physcomitrella patens on solid media under controlled environmental conditions in order to study the growth inhibiting effects of copper, zinc and cadmium and the contribution of corresponding anions as chlorides, sulfates and ethylenediaminetetraacetic acid, respectively. Availability of the metals to plants was estimated both by water extraction with subsequent measurement by inductively coupled plasma mass spectroscopy and by modeling metal speciation using Visual MINTEQ a free chemical equilibrium model software. A decreased ratio of gametophyte to protonema growth (G:P) was observed as a first reaction to even very low metal levels; G:P measurements can therefore be used as sensitive stress indicators in P. patens . Though all metals caused inhibiting effects with all anions, ethylenediaminetetraacetic acid chelates showed up to three orders of magnitude less toxic. Using Visual MINTEQ, we modeled the water solubility of zinc almost perfectly but achieved less accurate results for copper. For both metals, water solubility was rather under- than overestimated, indicating that adsorption to the agar played only a minor role in controlling metal solubility. Free metal cations were useful to explain growth inhibition which could not be fully explained by total metal concentration, calculated or experimentally determined water solubility. Especially the low toxicity of ethylenediaminetetraacetic acid chelates could be explained satisfactory by shielding of the metal ions.
- Published
- 2015
46. Speciation of 2′-deoxymugineic acid–metal complexes in top soil extracts by multi-modal stationary phase LC-ICP-MS
- Author
-
Y. Schindlegger, Gerhard Stingeder, Eva Oburger, Markus Puschenreiter, Stephan Hann, and Gunda Koellensperger
- Subjects
Detection limit ,Rhizosphere ,Ion exchange ,Analytical chemistry ,Analytical Chemistry ,Metal ,chemistry.chemical_compound ,chemistry ,Transition metal ,visual_art ,visual_art.visual_art_medium ,Methanol ,Ammonium acetate ,Inductively coupled plasma mass spectrometry ,Spectroscopy - Abstract
2′-Deoxymugineic acid (DMA) is a principal representative of phytosiderophores exuded by graminaceous plants in response to iron limiting soil conditions. In the present work a method for selective quantification of metal–DMA complexes has been developed enabling us to investigate the interplay of DMA with transition metals at the root–soil interface, i.e. the rhizosphere. Chromatographic separation was performed via gradient elution preserving complex integrity at pH 6.6 in 55 mM ammonium acetate and 10% methanol on a mixed-mode reversed phase/weak anion exchange stationary phase. Quantification of the DMA–complexes of Fe, Co, Cu, Ni, Mn and Zn in soil related matrices was performed via an ICP-MS utilizing dynamic reaction cell technique with methane as reaction gas. Limits of detection and quantification were obtained in the range of 10 to 120 nM and 40 to 400 nM, respectively. Long term precision of the method was
- Published
- 2015
47. Microbe and plant assisted-remediation of organic xenobiotics and its enhancement by genetically modified organisms and recombinant technology: A review
- Author
-
Fang Wang, Jabir Hussain Syed, Qaisar Mahmood, Thomas G. Reichenauer, Shahida Shaheen, Imran Hussain, Markus Puschenreiter, Ravi Naidu, Gajender Aleti, and Mohammad Mahmudur Rahman
- Subjects
0301 basic medicine ,Environmental Engineering ,Environmental remediation ,Genetically modified crops ,010501 environmental sciences ,01 natural sciences ,Xenobiotics ,03 medical and health sciences ,Soil ,Bioremediation ,Environmental Chemistry ,Soil Pollutants ,Waste Management and Disposal ,0105 earth and related environmental sciences ,Pollutant ,Ecosystem health ,fungi ,food and beverages ,Plants ,Plants, Genetically Modified ,Pollution ,Genetically modified organism ,Phytoremediation ,030104 developmental biology ,Biodegradation, Environmental ,Environmental science ,Biochemical engineering - Abstract
Environmental problems such as the deterioration of groundwater quality, soil degradation and various threats to human, animal and ecosystem health are closely related to the presence of high concentrations of organic xenobiotics in the environment. Employing appropriate technologies to remediate contaminated soils is crucial due to the site-specificity of most remediation methods. The limitations of conventional remediation technologies include poor environmental compatibility, high cost of implementation and poor public acceptability. This raises the call to employ biological methods for remediation. Bioremediation and microbe-assisted bioremediation (phytoremediation) offer many ecological and cost-associated benefits. The overall efficiency and performance of bio- and phytoremediation approaches can be enhanced by genetically modified microbes and plants. Moreover, phytoremediation can also be stimulated by suitable plant-microbe partnerships, i.e. plant-endophytic or plant-rhizospheric associations. Synergistic interactions between recombinant bacteria and genetically modified plants can further enhance the restoration of environments impacted by organic pollutants. Nevertheless, releasing genetically modified microbes and plants into the environment does pose potential risks. These can be minimized by adopting environmental biotechnological techniques and guidelines provided by environmental protection agencies and other regulatory frameworks. The current contribution provides a comprehensive overview on enhanced bioremediation and phytoremediation approaches using transgenic plants and microbes. It also sheds light on the mitigation of associated environmental risks.
- Published
- 2017
48. Immobilisation of metals in a contaminated soil with biochar-compost mixtures and inorganic additives: 2-year greenhouse and field experiments
- Author
-
Māra Stapkēviča, Franz Zehetner, Jasmin Karer, Gerhard Soja, Jakob Fessl, Gerald Dunst, Markus Puschenreiter, Wolfgang Friesl-Hanl, and Mario Wagner
- Subjects
Environmental remediation ,Health, Toxicology and Mutagenesis ,0211 other engineering and technologies ,Amendment ,chemistry.chemical_element ,02 engineering and technology ,010501 environmental sciences ,engineering.material ,Poaceae ,01 natural sciences ,Biochar ,Environmental Chemistry ,Soil Pollutants ,Environmental Restoration and Remediation ,0105 earth and related environmental sciences ,021110 strategic, defence & security studies ,Cadmium ,biology ,Compost ,Composting ,General Medicine ,Miscanthus ,biology.organism_classification ,Pollution ,Soil contamination ,Zinc ,Biodegradation, Environmental ,Agronomy ,chemistry ,Lead ,Environmental chemistry ,Charcoal ,Soil water ,engineering ,Seasons - Abstract
Besides carbon sequestration and improvement of soil properties, biochar (BC) has increasingly been studied as an amendment to immobilise heavy metals in contaminated soils. In a 2-year experiment, we analysed the effects of poplar BC (P-BC, mixed with compost) and gravel sludge with siderite-bearing material (GSFe) on a Cd-, Pb- and Zn-contaminated soil and on metal concentration in Miscanthus × giganteus shoots under greenhouse and field conditions. In the greenhouse, 1% (m/m) P-BC addition reduced NH4NO3-extractable Cd, Pb and Zn concentrations by 75, 86 and 92%, respectively, at the end of the study. In the leachates, P-BC (1%) could significantly reduce Cd and Zn in both years. In the field, P-BC (3%) induced a reduction of extractable Cd by 87% whereas a combination of P-BC + GSFe reduced Pb by 82% and Zn by 98% in the first year and by 83 and 96% in the second year. In contrast, the metal immobilisation in the soil was hardly reflected in the shoots of Miscanthus × giganteus which generally showed metal concentrations close to control. While Cd was not influenced in both years, Pb and Zn were slightly reduced. Our study confirmed that Miscanthus is an efficient metal excluder, corroborating its suitability for the production of renewable biomass on metal-contaminated soils.
- Published
- 2017
49. Investigations of microbial degradation of polycyclic aromatic hydrocarbons based on
- Author
-
Anna, Wawra, Wolfgang, Friesl-Hanl, Anna, Jäger, Markus, Puschenreiter, Gerhard, Soja, Thomas, Reichenauer, and Andrea, Watzinger
- Subjects
Carbon Isotopes ,Soil ,Biodegradation, Environmental ,Austria ,Metals, Heavy ,Robinia ,Soil Pollutants ,Salix ,Models, Theoretical ,Phenanthrenes ,Polycyclic Aromatic Hydrocarbons ,Soil Microbiology ,Trace Elements - Abstract
Co-contaminations of soils with organic and inorganic pollutants are a frequent environmental problem. Due to their toxicity and recalcitrance, the heterogeneous pollutants may persist in soil. The hypothesis of this study was that degradation of polycyclic aromatic hydrocarbons (PAHs) is enhanced if heavy metals in soil are immobilized and their bioavailability reduced. For metal immobilization and enhanced biodegradation, distinct mineral and organic soil amendments (iron oxides, gravel sludge, biochar) were deployed in an incubation batch experiment. The second part of the experiment consisted of a greenhouse pot experiment applying fast-growing and pollution-tolerant woody plants (willow and black locust). Soil amendments initially immobilized NH
- Published
- 2017
50. Effect of bacterial inoculants on phytomining of metals from waste incineration bottom ash
- Author
-
Markus Puschenreiter, Theresa Rosenkranz, and Petra Kidd
- Subjects
Bioaugmentation ,Biomass ,Incineration ,010501 environmental sciences ,complex mixtures ,01 natural sciences ,Coal Ash ,Waste Management and Disposal ,Microbial inoculant ,0105 earth and related environmental sciences ,Rhizosphere ,Bacteria ,fungi ,food and beverages ,04 agricultural and veterinary sciences ,Agricultural Inoculants ,Soil contamination ,Refuse Disposal ,Europe ,Phytoremediation ,Biodegradation, Environmental ,Agronomy ,Metals ,Bottom ash ,040103 agronomy & agriculture ,0401 agriculture, forestry, and fisheries ,Environmental science - Abstract
Waste incineration bottom ash is considered a secondary resource for valuable trace elements (TE), which is currently neglected in most European countries. Phytomining could potentially recover valuable TE from such waste materials but is still at an exploratory stage with many challenges. The use of bioaugmentation to improve plant growth and TE accumulation of metal-tolerant high biomass plants growing on waste incineration bottom ash was evaluated. Bacterial strains that were previously isolated from rhizosphere, roots and contaminated soil were selected according to their plant growth promoting characteristics and tolerance to the bottom ash substrate. Those selected bacterial strains were tested for their beneficial effects on Nicotiana tabacum and Salix smithiana with regards to phytomining. The rhizobacterial strain Rhodococcus erythropolis P30 enhanced the shoot dry weight of N. tabacum by on average 57% compared to the control plants. Several bacterial inoculants enhanced biomass production and the nutritional status of S. smithiana. Moreover, those bacterial strains previously described to enhance biomass production of N. tabacum and members of the Salicaceae on TE-contaminated soils, also enhanced biomass production of these species on bottom ash. However, bacterial inoculants could not enhance trace element accumulation in plants.
- Published
- 2017
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.