Cr(VI) reduction by sulfidogenic and nonsulfidogenic microbial consortia.
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.[1]References
- Cr(VI) reduction by sulfidogenic and nonsulfidogenic microbial consortia. Arias, Y.M., Tebo, B.M. Appl. Environ. Microbiol. (2003) [Pubmed]
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