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Your search keyword '"Cacchio, Paola"' showing total 104 results
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104 results on '"Cacchio, Paola"'

1. The Development of Soil Science in Abruzzo

Author

Chiuchiarelli, Igino, Cacchio, Paola, Del Gallo, Maddalena, Lepidi, Aldo, Magaldi, Donatello, Pellegrini, Marika, Santucci, Sergio, Dazzi, Carmelo, editor, Benedetti, Anna, editor, Corti, Giuseppe, editor, and Costantini, Edoardo A. C., editor

Published
2024
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2. Isolation and characterization of cyanobacteria and microalgae from a sulfuric pond: Plant growth-promoting and soil bioconsolidation activities.

Author

Farda, Beatrice, Djebaili, Rihab, Sabbi, Enrico, Pagnani, Giancarlo, Cacchio, Paola, and Pellegrini, Marika

Subjects
COMMON sunflower, SUSTAINABLE agriculture, RENEWABLE natural resources, AGRICULTURAL industries, PLANT-soil relationships
Abstract

Sustainable alternatives are essential to improving agriculture production to meet the growing world's critical demands. Cyanobacteria and microalgae are considered renewable resources with a wide range of potential uses in the agricultural sector. We aimed to isolate cyanobacteria and microalgae from the mud of a carbon dioxide-rich sulfur pond and to investigate their plant growth-promoting (PGP) and soil bio-consolidating ability. Mud samples were subjected to DNA extraction and 16S rRNA gene sequencing to characterize the prokaryotic community. Phototrophic culturable microbiota was isolated and evaluated for different PGP properties. The most relevant isolates were combined in a consortium and used for in vitro bioconsolidation activity. In a greenhouse experiment, the isolates were evaluated for their ability to promote salinity stress tolerance in sunflower plants. Metabarcoding results showed that most Amplicon Sequence Variants (ASV) were associated with Actinobacteriota (35%), Proteobacteria (19%), and Acidobacteriota (11%) at the phylum level and Unknown (32%) and uncultured (31%) lineages at the genus level. The culture-dependent method yielded eight isolates associated with cyanobacteria and microalgae genera. The isolates obtained showed interesting PGP activities. Isolates C1, C2, and M1 were selected based on phosphate solubilization (85.6 µg PO43- mL-1 on average), indoles (C1 and M1 0.54 µg mL-1 IAA equivalents on average), and ACC deaminase activity (C2 and M1 6.00 µmol α-KB mg proteins-1 h-1). The consortium efficiently consolidated sand particles in the presence of calcium carbonate by forming activities biomineralized aggregates. In planta results showed positive effects of the consortium on Helianthus annuus L., plant growth under normal conditions and salt stress. The positive effects on soil and plants indicated their effectiveness as bioconsolidants and biostimulant agents. Our findings highlight the interesting potential of cyanobacteria and microalgae applications in sustainable agriculture. [ABSTRACT FROM AUTHOR]

Published
2024
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6. Deposition of calcium carbonate in karst caves: role of bacteria in Stiffe's cave.

Author

Ercole Claudia, Cacchio Paola, Cappuccio Giorgio, and Lepidi Aldo

Subjects
Bacteria, calcium carbonate precipitation, karst, cave, Biology (General), QH301-705.5, Geology, QE1-996.5
Abstract

Bacteria make a significant contribution to the accumulation of carbonate in several natural habitats where large amounts of carbonates are deposited. However, the role played by microbial communities in speleothem formation (stalactites, stalagmites etc.) in caves is still unclear. In bacteria carbonate is formed by autotrophic pathways, which deplete CO2 from the environment, and by heterotrophic pathways, leading to active or passive precipitation. We isolated cultivable heterotrophic microbial strains, able to induce CaCO3 precipitation in vitro, from samples taken from speleothems in the galleries of Stiffe’s cave, L’Aquila, Italy. We found a large number of bacteria in the calcite formations (1 x 104 to 5 x 109 cells g-1). Microscopic examination, in laboratory conditions at different temperatures, showed that most of the isolates were able to form calcium carbonate microcrystals. The most crystalline precipitates were observed at 32°C. No precipitation was detected in un-inoculated controls media or in media that had been inoculated with autoclaved bacterial cells. X-ray diffraction (XRD) analysis showed that most of the carbonate crystals produced were calcite. Bacillus strains were the most common calcifying isolates collected from Stiffe’s Cave. Analysis of carbonate-solubilization capability revealed that the non-calcifying bacteria were carbonate solubilizers.

Published
2001

8. Evidence for the microbial origin of 'living rocks' erratic masses

Author

Pellegrini, Marika, Mignini, Amedeo, Cacchio, Paola, Djebaili, Rijhab, Vaccarelli, Ilaria, Farda, Beatrice, Ercole, Claudia, and DEL GALLO, MARIA MADDALENA

Subjects
Trovant, Trovant, erratic masses, calcifying microorganisms, erratic masses, calcifying microorganisms
Published
2021

14. Cave Microbial Survey: proposta di implementazione dati sulla microflora ipogea

Author

Ilaria, Vaccarelli, Cacchio, Paola, and DEL GALLO, MARIA MADDALENA

Subjects
Citizen science, scheda digitale, database, geomicrobiologia, cavità naturali, cavità artificiali, biofilm, patine microbiologiche, grotte turistiche, cavità naturali, cavità artificiali, scheda digitale, Citizen science, geomicrobiologia, grotte turistiche, patine microbiologiche, database, biofilm
Published
2018

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