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Appl. Environ. Microbiol., May 1996, 1623-1629, Vol 62, No. 5
G Voordouw, SM Armstrong, MF Reimer, B Fouts, AJ Telang, Y Shen and D Gevertz
Oil field bacteria were characterized by cloning and sequencing of PCR-
amplified 16S rRNA genes. A variety of gram-negative, sulfate-reducing
bacteria was detected (16 members of the family Desulfovibrionaceae and 8
members of the family Desulfobacteriaceae). In contrast, a much more
limited number of anaerobic, fermentative, or acetogenic bacteria was found
(one Clostridium sp., one Eubacterium sp., and one Synergistes sp.).
Potential sulfide oxidizers and/or microaerophiles (Thiomicrospira,
Arcobacter, Campylobacter, and Oceanospirillum spp.) were also detected.
The first two were prominently amplified from uncultured production water
DNA and represented 28 and 47% of all clones, respectively. Growth on media
containing sulfide as the electron donor and nitrate as the electron
acceptor and designed for the isolation of Thiomicrospira spp. gave only
significant enrichment of the Campylobacter sp., which was shown to be
present in different western Canadian oil fields. This newly discovered
sulfide oxidizer may provide a vital link in the oil field sulfur cycle by
reoxidizing sulfide formed by microbial sulfate or sulfur reduction.
Copyright © 1996, American Society for Microbiology
Characterization of 16S rRNA genes from oil field microbial communities indicates the presence of a variety of sulfate-reducing, fermentative, and sulfide-oxidizing bacteria
Department of Biological Sciences, University of Calgary, Alberta, Canada. voordouw@acs.ucalgary.ca
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