Molecular characterization of sulfate-reducing bacteria in the Guaymas Basin


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dc.contributor.author Dhillon, Ashita
dc.contributor.author Teske, Andreas
dc.contributor.author Dillon, Jesse
dc.contributor.author Stahl, David A.
dc.contributor.author Sogin, Mitchell L.
dc.date.accessioned 2005-11-23T19:14:19Z
dc.date.available 2005-11-23T19:14:19Z
dc.date.issued 2003-05
dc.identifier.citation Applied and Environmental Microbiology 69 (2003): 2765-2772 en
dc.identifier.uri http://hdl.handle.net/1912/188
dc.description Author Posting. © American Society for Microbiology, 2003. This article is posted here by permission of American Society for Microbiology for personal use, not for redistribution. The definitive version was published in Applied and Environmental Microbiology 69 (2003): 2765-2772, doi:10.1128/AEM.69.5.2765-2772.2003.
dc.description.abstract The Guaymas Basin (Gulf of California) is a hydrothermal vent site where thermal alteration of deposited planktonic and terrestrial organic matter forms petroliferous material which supports diverse sulfate-reducing bacteria. We explored the phylogenetic and functional diversity of the sulfate-reducing bacteria by characterizing PCR-amplified dissimilatory sulfite reductase (dsrAB) and 16S rRNA genes from the upper 4 cm of the Guaymas sediment. The dsrAB sequences revealed that there was a major clade closely related to the acetate-oxidizing delta-proteobacterial genus Desulfobacter and a clade of novel, deeply branching dsr sequences related to environmental dsr sequences from marine sediments in Aarhus Bay and Kysing Fjord (Denmark). Other dsr clones were affiliated with gram-positive thermophilic sulfate reducers (genus Desulfotomaculum) and the delta-proteobacterial species Desulforhabdus amnigena and Thermodesulforhabdus norvegica. Phylogenetic analysis of 16S rRNAs from the same environmental samples resulted in identification of four clones affiliated with Desulfobacterium niacini, a member of the acetate-oxidizing, nutritionally versatile genus Desulfobacterium, and one clone related to Desulfobacula toluolica and Desulfotignum balticum. Other bacterial 16S rRNA bacterial phylotypes were represented by non-sulfate reducers and uncultured lineages with unknown physiology, like OP9, OP8, as well as a group with no clear affiliation. In summary, analyses of both 16S rRNA and dsrAB clone libraries resulted in identification of members of the Desulfobacteriales in the Guaymas sediments. In addition, the dsrAB sequencing approach revealed a novel group of sulfate-reducing prokaryotes that could not be identified by 16S rRNA sequencing. en
dc.description.sponsorship This study was supported by the NASA Astrobiology Institute (grant CAN NCC2-1054) and by the G. Unger Vetlesen Foundation. Sampling at the Guaymas Basin was made possible by NSF Life in Extreme Environments grant OCE 9714195 to A.T. en
dc.format.extent 276369 bytes
dc.format.mimetype application/pdf
dc.language.iso en_US en
dc.publisher American Society for Microbiology en
dc.relation.uri http://dx.doi.org/10.1128/AEM.69.5.2765-2772.2003
dc.subject Sulfate-reducing bacteria en
dc.subject Desulfobacteriales en
dc.title Molecular characterization of sulfate-reducing bacteria in the Guaymas Basin en
dc.type Article en
dc.identifier.doi 10.1128/AEM.69.5.2765-2772.2003

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