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Culture-dependent study of arsenic reducing bacteria in deep aquatic sediments of Bengal Delta

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Title Culture-dependent study of arsenic reducing bacteria in deep aquatic sediments of Bengal Delta
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Creator Bandopadhyay C
Manna SK, Samanta S, Chowdhury AN, Maitra N, Mohanty BP, Sarkar K and Mukherjee SK
 
Subject Culture-dependent ,arsenic,deep aquatic sediments
 
Description Not Available
Biogeochemical release of soil-bound arsenic (As) governs mobilization of the toxic metalloid into the groundwater. The present study has examined AsV-reduction ability of bacteria from anoxic aquatic sediments that might contribute to arsenic mobilization in the Bengal Delta. Arsenic-reducing bacteria from deep layers of pond sediment were enriched and isolated in anaerobic environments and AsV reduction was assessed in culture medium. The pond sediment enrichments harboured AsV-reducing bacteria belonging to the phyla Firmicutes and Proteobacteria with dominance of Paraclostridium benzoelyticum and P. bifermentans. Among total 17 isolates, the respiratory reductase genes were not detected by the most common primers and only 3 strains had arsenic reductase ArsC gene suggesting involvement of resistance and some unknown mechanisms in AsV reduction. Presence of high levels of organic matter, As, and As-reducing bacteria might make deep aquatic sediments a hot spot of As mobilization and aquifer contamination.
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Date 2022-06-25T12:34:32Z
2022-06-25T12:34:32Z
2021-01-01
 
Type Research Paper
 
Identifier Not Available
Not Available
http://krishi.icar.gov.in/jspui/handle/123456789/73470
 
Language English
 
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Publisher Not Available