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• W4313289323 abstract "Abstract Background : Arsenic (As) and its species are major pollutants in ecological bodied including groundwater in Bangladesh rendering serious public health concern. Bacteria with arsenotrophic genes have been found in the aquifer, converting toxic arsenite [As (III)] to less toxic arsenate [As (V)] that is easily removed using chemical and biological trappers. In this study, genomic and metagenomic approaches parallel to culture-based assay (Graphical abstract) have made it possible to decipher phylogenetic diversity of groundwater arsenotrophic microbiomes along with elucidation of their genetic determinants. Results : Seventy-two isolates were retrieved from six As-contaminated (average As concentration of 0.23 mg/L) groundwater samples from Munshiganj and Chandpur districts of Bangladesh. Twenty-three isolates harbored arsenite efflux pump ( ars B) gene with high abundance, and ten isolates possessing arsenite oxidase ( aio A) gene, with a wide range of minimum inhibitory concentration, MIC As (2 to 32 mM), confirming their role in arsenite metabolism. Shotgun metagenomic analysis revealed considerable parallels with the culture-dependent method proving their complementarity in detecting native population bacteria in As containing aquifers. There was considerable heterogeneity in species richness and microbial community structure. Microbial taxa from Proteobacteria, Firmicutes and Acidobacteria dominated these diversities. Through these combinatorial approaches, we have identified potential candidates such as, Pseudomonas , Acinetobacter , Stenotrophomonas , Achromobacter , Paraburkholderia , Comamonas and Klebsiella and associated functional genes ( ars B, acr 3, ars D, ars H, ars R) that could significantly contribute to arsenite detoxification, accumulation, and immobilization. Conclusions : Culture-dependent and -independent shotgun metagenomic investigation elucidated arsenotrophic microbiomes and their functions in As biogeochemical transformation. These findings provide scientific basis for mitigating arsenic pollution in the groundwater of Bangladesh and beyond." @default.
• W4313289323 created "2023-01-06" @default.
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• W4313289323 date "2022-12-29" @default.
• W4313289323 modified "2023-10-01" @default.
• W4313289323 title "Metagenomic and culture-dependent approaches unveil active microbial community and novel functional genes involved in arsenic mobilization and detoxification in groundwater" @default.
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• W4313289323 doi "https://doi.org/10.21203/rs.3.rs-2390178/v1" @default.
• W4313289323 hasPublicationYear "2022" @default.
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