Cr(VI) reduction by sulfidogenic and nonsulfidogenic microbial consortia

Y. Meriah Arias; Bradley M. Tebo

doi:10.1128/AEM.69.3.1847-1853.2003

Cr(VI) reduction by sulfidogenic and nonsulfidogenic microbial consortia

Y. Meriah Arias, Bradley M. Tebo

Center for Coastal Margins

Research output: Contribution to journal › Article › peer-review

46 Scopus citations

Abstract

In time course experiments, bacterial community compositions were compared between a sulfidogenic and two nonsulfidogenic Cr(VI)-reducing consortia enriched from metal-contaminated sediments. The consortia were subjected to 0 and 0.85 mM or 1.35 mM Cr(VI), and Cr(VI) reduction, growth, and denaturing gradient gel electrophoresis profiles of PCR products of small-subunit (16S) ribosomal genes were compared. Results showed that although Cr(VI) was completely reduced by the three consortia, Cr(VI) inhibited cell growth, with sulfate-reducing bacteria being particularly sensitive to Cr(VI) toxicity relative to other bacteria in the consortia.

Original language	English (US)
Pages (from-to)	1847-1853
Number of pages	7
Journal	Applied and Environmental Microbiology
Volume	69
Issue number	3
DOIs	https://doi.org/10.1128/AEM.69.3.1847-1853.2003
State	Published - Mar 1 2003

ASJC Scopus subject areas

Biotechnology
Food Science
Applied Microbiology and Biotechnology
Ecology

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abstract = "In time course experiments, bacterial community compositions were compared between a sulfidogenic and two nonsulfidogenic Cr(VI)-reducing consortia enriched from metal-contaminated sediments. The consortia were subjected to 0 and 0.85 mM or 1.35 mM Cr(VI), and Cr(VI) reduction, growth, and denaturing gradient gel electrophoresis profiles of PCR products of small-subunit (16S) ribosomal genes were compared. Results showed that although Cr(VI) was completely reduced by the three consortia, Cr(VI) inhibited cell growth, with sulfate-reducing bacteria being particularly sensitive to Cr(VI) toxicity relative to other bacteria in the consortia.",

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