Abstract
The Hg-methylating ability of dissimilatory iron-reducing bacteria in the genera Geobacter, Desulfuromonas, and Shewanella was examined. All of the Geobacter and Desulfuromonas strains tested methylated mercury while reducing Fe(III), nitrate, or fumarate. In contrast, none of the Shewanella strains produced methylmercury at higher levels than abiotic controls under similar culture conditions. Geobacter and Desulfuromonas are closely related to known Hg-methylating sulfate-reducing bacteria within the Deltaproteobacteria.
Publication types
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Research Support, Non-U.S. Gov't
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Research Support, U.S. Gov't, Non-P.H.S.
MeSH terms
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Desulfuromonas / growth & development
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Desulfuromonas / metabolism
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Geobacter / growth & development
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Geobacter / metabolism
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Iron / metabolism*
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Mercury / metabolism*
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Methylation
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Methylmercury Compounds / metabolism*
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Oxidation-Reduction
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Phylogeny
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Proteobacteria / growth & development
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Proteobacteria / metabolism*
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Shewanella / growth & development
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Shewanella / metabolism
Substances
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Methylmercury Compounds
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Iron
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Mercury