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Title of Journal: World J Microbiol Biotechnol

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Abbravation: World Journal of Microbiology and Biotechnology

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Springer Netherlands

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DOI

10.1016/0007-6813(83)90024-1

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1573-0972

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Phylogenetic and phenotypic analyses of arsenicre

Authors: Pechrada Jareonmit Misha Mehta Michael J Sadowsky Kannika Sajjaphan
Publish Date: 2012/03/16
Volume: 28, Issue: 5, Pages: 2287-2292
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Abstract

An agar plate screening assay was used to determine whether 100 arsenicresistant bacterial isolates previously obtained from arseniccontaminated soils had the ability to transform arsenite and arsenate Ninetyfive percent of the isolates were capable of reducing arsenate on agar plates The isolates also grew in the presence of high concentrations of arsenite but none of the bacterial isolates oxidized arsenite to arsenate under the growth conditions tested About 14  13 of 95 of the tested isolates transformed high levels of arsenate 33–70 μM when tested using the molybdenum blue method Partial sequence analysis of 16S rDNA genes indicated that the isolates belonged to two broad taxonomic groups Firmicutes and Proteobacteria Ten isolates were assigned to four species in the genus Bacillus and three isolates belonged to two species in the genera Enterobacter and Ochrobactrum Taken together these results indicate that phylogenetically diverse bacteria isolated from arseniccontaminated soils in an old tin mine area in Thailand have the ability to transform arsenate to arsenite

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