Mercury Methylation by Dissimilatory Iron-Reducing Bacteria

Mercury methylation by dissimilatory iron-reducing bacteria.

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. ...

Title of Document : MERCURY METHYLATION IN DISSIMILATORY IRON - REDUCING BACTERIA

Title of Document: MERCURY METHYLATION IN DISSIMILATORY IRON-REDUCING BACTERIA 22BElizabeth Johanna Kerin, Master of Science, 2007 Directed By: Dr. Marcelino Suzuki, Marine, Estuarine and Environmental Sciences Microbial mercury methylation is an integral factor controlling methylmercury concentrations within aquatic ecosystems. This thesis explores the phylogenetic distribution and biochemistr...

Assessing Mutualism Between Dissimilatory Ferric Iron- and Sulfate-Reducing Bacteria

Alteration of iron-rich lacustrine sediments by dissimilatory iron-reducing bacteria

The reduction of Fe during bacterial anaerobic respiration in sediments and soils not only causes the degradation of organic matter but also results in changes in mineralogy and the redistribution of many nutrients and trace metals. Understanding trace metal patterns in sedimentary rocks and predicting the fate of contaminants in the environment requires a detailed understanding of the mechanis...

Phylogenetic analysis of dissimilatory Fe(III)-reducing bacteria.

Evolutionary relationships among strictly anaerobic dissimilatory Fe(III)-reducing bacteria obtained from a diversity of sedimentary environments were examined by phylogenetic analysis of 16S rRNA gene sequences. Members of the genera Geobacter, Desulfuromonas, Pelobacter, and Desulfuromusa formed a monophyletic group within the delta subdivision of the class Proteobacteria. On the basis of the...