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Media type:
E-Article
Title:
Quantification of Desulfovibrio vulgaris Dissimilatory Sulfite Reductase Gene Expression during Electron Donor- and Electron Acceptor-Limited Growth
Contributor:
Villanueva, Laura;
Haveman, Shelley A.;
Summers, Zara M.;
Lovley, Derek R.
imprint:
American Society for Microbiology, 2008
Published in:Applied and Environmental Microbiology
Description:
<jats:title>ABSTRACT</jats:title>
<jats:p>
Previous studies have suggested that levels of transcripts for
<jats:italic>dsrA</jats:italic>
, a gene encoding a subunit of the dissimilatory sulfite reductase, are not directly related to the rates of sulfate reduction in sediments under all conditions. This phenomenon was further investigated with chemostat-grown
<jats:italic>Desulfovibrio vulgaris</jats:italic>
. Under sulfate-limiting conditions,
<jats:italic>dsrA</jats:italic>
transcript levels increased as the bulk rates of sulfate reduction in the chemostat increased, but transcript levels were similar at all sulfate reduction rates under electron donor-limiting conditions. When both electron donor- and electron acceptor-limiting conditions were considered, there was a direct correspondence between
<jats:italic>dsrA</jats:italic>
transcript levels and the rates of sulfate reduction per cell. These results suggest that
<jats:italic>dsrA</jats:italic>
transcript levels may provide important information on the metabolic state of sulfate reducers.
</jats:p>