7 results on '"Petruccioli, Maurizio"'
Search Results
2. Identification of Resistance Genes and Response to Arsenic in Rhodococcus aetherivorans BCP1
- Author
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Firrincieli, Andrea, primary, Presentato, Alessandro, additional, Favoino, Giusi, additional, Marabottini, Rosita, additional, Allevato, Enrica, additional, Stazi, Silvia Rita, additional, Scarascia Mugnozza, Giuseppe, additional, Harfouche, Antoine, additional, Petruccioli, Maurizio, additional, Turner, Raymond J., additional, Zannoni, Davide, additional, and Cappelletti, Martina, additional
- Published
- 2019
- Full Text
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3. Aerobic Growth of Rhodococcus aetherivorans BCP1 Using Selected Naphthenic Acids as the Sole Carbon and Energy Sources
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Presentato, Alessandro, primary, Cappelletti, Martina, additional, Sansone, Anna, additional, Ferreri, Carla, additional, Piacenza, Elena, additional, Demeter, Marc A., additional, Crognale, Silvia, additional, Petruccioli, Maurizio, additional, Milazzo, Giorgio, additional, Fedi, Stefano, additional, Steinbüchel, Alexander, additional, Turner, Raymond J., additional, and Zannoni, Davide, additional
- Published
- 2018
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4. Fungal Community Structure and As-Resistant Fungi in a Decommissioned Gold Mine Site
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Crognale, Silvia, primary, D'Annibale, Alessandro, additional, Pesciaroli, Lorena, additional, Stazi, Silvia R., additional, and Petruccioli, Maurizio, additional
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- 2017
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5. Time-Dependent Changes in Morphostructural Properties and Relative Abundances of Contributors in Pleurotus ostreatus / Pseudomonas alcaliphila Mixed Biofilms.
- Author
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Crognale, Silvia, Stazi, Silvia Rita, Firrincieli, Andrea, Pesciaroli, Lorena, Fedi, Stefano, Petruccioli, Maurizio, and D'Annibale, Alessandro
- Subjects
FATTY acid methyl esters ,PLEUROTUS ostreatus - Abstract
Pleurotus ostreatus dual biofilms with bacteria are known to be involved in rock phosphate solubilization, endophytic colonization, and even in nitrogen fixation. Despite these relevant implications, no information is currently available on the architecture of P. ostreatus -based dual biofilms. In addition to this, there is a limited amount of information regarding the estimation of the temporal changes in the relative abundances of the partners in such binary systems. To address these issues, a dual biofilm model system with this fungus was prepared by using Pseudomonas alcaliphila 34 as the bacterial partner due to its very fast biofilm-forming ability. The application of the bacterial inoculum to already settled fungal biofilm on a polystyrene surface coated with hydroxyapatite was the most efficient approach to the production of the mixed system the ultrastructure of which was investigated by a multi-microscopy approach. Transmission electron microscopy analysis showed that the adhesion of bacterial cells onto the mycelial cell wall appeared to be mediated by the presence of an abundant layer of extracellular matrix (ECM). Scanning electron microscopy analysis showed that ECM filaments of bacterial origin formed initially a reticular structure that assumed a tabular semblance after 72 h, thus overshadowing the underlying mycelial network. Across the thickness of the mixed biofilms, the presence of an extensive network of channels with large aggregates of viable bacteria located on the edges of their lumina was found by confocal laser scanning microscopy; on the outermost biofilm layer, a significant fraction of dead bacterial cells was evident. Albeit with tangible differences, similar results regarding the estimation of the temporal shifts in the relative abundances of the two partners were obtained by two independent methods, the former relying on qPCR targeting of 16S and 18S rRNA genes and the latter on ester-linked fatty acid methyl esters analysis. [ABSTRACT FROM AUTHOR]
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- 2019
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6. Microbiome Dynamics of a Polychlorobiphenyl (PCB) Historically Contaminated Marine Sediment under Conditions Promoting Reductive Dechlorination.
- Author
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Matturro, Bruna, Ubaldi, Carla, Rossetti, Simona, Hemme, Christopher L., and Petruccioli, Maurizio
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POLYCHLORINATED biphenyls ,DECHLORINATION (Chemistry) ,TOXICITY testing - Abstract
The toxicity of polychlorinated biphenyls (PCB) can be efficiently reduced in contaminated marine sediments through the reductive dechlorination (RD) process lead by anaerobic organohalide bacteria. Although the process has been extensively investigated on PCB-spiked sediments, the knowledge on the identity and metabolic potential of PCB-dechlorinating microorganisms in real contaminated matrix is still limited. Aim of this study was to explore the composition and the dynamics of the microbial communities of the marine sediment collected from one of the largest Sites of National Interest (SIN) in Italy (Mar Piccolo, Taranto) under conditions promoting the PCBs RD. A long-term microcosm study revealed that autochthonous bacteria were able to sustain the PCB dechlorination at a high extent and the successive addition of an external fermentable organic substrate (lactate) caused the further depletion of the high-chlorinated PCBs (up to 70%). Next Generation Sequencing was used to describe the core microbiome of the marine sediment and to follow the changes caused by the treatments. OTUs affiliated to sulfur-oxidizing +-proteobacteria, Sulfurovum, and Sulfurimonas, were predominant in the original sediment and increased up to 60% of total OTUs after lactate addition. Other OTUs detected in the sediment were affiliated to sulfate reducing (d-proteobacteria) and to organohalide respiring bacteria within Chloroflexi phylum mainly belonging to Dehalococcoidia class. Among others, Dehalococcoides mccartyi was enriched during the treatments even though the screening of the specific reductive dehalogenase genes revealed the occurrence of undescribed strains, which deserve further investigations. Overall, this study highlighted the potential of members of Dehalococcoidia class in reducing the contamination level of the marine sediment from Mar Piccolo with relevant implications on the selection of sustainable bioremediation strategies to clean-up the site. [ABSTRACT FROM AUTHOR]
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- 2016
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7. Identification of Resistance Genes and Response to Arsenic in Rhodococcus aetherivorans BCP1
- Author
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Silvia Rita Stazi, Giuseppe Scarascia Mugnozza, Davide Zannoni, Antoine Harfouche, Giusi Favoino, Maurizio Petruccioli, Martina Cappelletti, Raymond J. Turner, Enrica Allevato, Rosita Marabottini, Alessandro Presentato, Andrea Firrincieli, Firrincieli, Andrea, Presentato, Alessandro, Favoino, Giusi, Marabottini, Rosita, Allevato, Enrica, Stazi, Silvia Rita, Scarascia Mugnozza, Giuseppe, Harfouche, Antoine, Petruccioli, Maurizio, Turner, Raymond J., Zannoni, Davide, Cappelletti, Martina, Firrincieli A., Presentato A., Favoino G., Marabottini R., Allevato E., Stazi S.R., Mugnozza G.S., Harfouche A., Petruccioli M., Turner R.J., Zannoni D., and Cappelletti M.
- Subjects
Microbiology (medical) ,arsenic resistance gene ,Thioredoxin reductase ,lcsh:QR1-502 ,chemistry.chemical_element ,Microbiology ,lcsh:Microbiology ,NO ,03 medical and health sciences ,chemistry.chemical_compound ,R. aetherivorans BCP1 ,Gene cluster ,Rhodococcus ,Arsenic ,030304 developmental biology ,Arsenite ,Original Research ,0303 health sciences ,biology ,030306 microbiology ,arsenate reduction ,arsenic resistance genes ,biology.organism_classification ,Actinobacteria ,Arsenate reductase ,Biochemistry ,chemistry ,arsenic resistance genes, arsenate reduction, Rhodococcus, R. aetherivorans BCP1, Actinobacteria ,Thioredoxin ,Energy source ,Rhodococcu - Abstract
This is the accepted manuscript of the paper "Identification of Resistance Genes and Response to Arsenic in Rhodococcus aetherivorans BCP1", published as final paper in "Frontiers in Microbiology Volume 10, 07 May 2019, Pages 888 https://doi.org/10.3389/fmicb.2019.00888”. Arsenic (As) ranks among the priority metal(loid)s that are of public health concern. In the environment, arsenic is present in different forms, organic or inorganic, featured by various toxicity levels. Bacteria have developed different strategies to deal with this toxicity involving different resistance genetic determinants. Bacterial strains of Rhodococcus genus, and more in general Actinobacteria phylum, have the ability to cope with high concentrations of toxic metalloids, although little is known on the molecular and genetic bases of these metabolic features. Here we show that Rhodococcus aetherivorans BCP1, an extremophilic actinobacterial strain able to tolerate high concentrations of organic solvents and toxic metalloids, can grow in the presence of high concentrations of As(V) (up to 240 mM) under aerobic growth conditions using glucose as sole carbon and energy source. Notably, BCP1 cells improved their growth performance as well as their capacity of reducing As(V) into As(III) when the concentration of As(V) is within 30–100 mM As(V). Genomic analysis of BCP1 compared to other actinobacterial strains revealed the presence of three gene clusters responsible for organic and inorganic arsenic resistance. In particular, two adjacent and divergently oriented ars gene clusters include three arsenate reductase genes (arsC1/2/3) involved in resistance mechanisms against As(V). A sequence similarity network (SSN) and phylogenetic analysis of these arsenate reductase genes indicated that two of them (ArsC2/3) are functionally related to thioredoxin (Trx)/thioredoxin reductase (TrxR)-dependent class and one of them (ArsC1) to the mycothiol (MSH)/mycoredoxin (Mrx)-dependent class. A targeted transcriptomic analysis performed by RT-qPCR indicated that the arsenate reductase genes as well as other genes included in the ars gene cluster (possible regulator gene, arsR, and arsenite extrusion genes, arsA, acr3, and arsD) are transcriptionally induced when BCP1 cells were exposed to As(V) supplied at two different sub-lethal concentrations. This work provides for the first time insights into the arsenic resistance mechanisms of a Rhodococcus strain, revealing some of the unique metabolic requirements for the environmental persistence of this bacterial genus and its possible use in bioremediation procedures of toxic metal contaminated sites.  
- Published
- 2019
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