Journal
MICROBIOLOGY
Volume 79, Issue 1, Pages 96-105Publisher
MAIK NAUKA/INTERPERIODICA/SPRINGER
DOI: 10.1134/S0026261710010133
Keywords
Lost City hydrothermal field; microbial diversity; sulfate-reducing bacteria; 16S rRNA; dsrAB; Desulfotomaculum
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Funding
- Russian Foundation for Basic Research [08-04-90712mob_st]
- Tomsk University innovation program (section Life Systems)
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The work is dedicated to searching for microorganisms of the domain Bacteria capable of dissimilatory sulfate reduction in the samples of microbial mats from a carbonate chimney in the Lost City hydro-thermal field. Cloning of 16S rRNA genes, the universal phylogenetic marker, and dsrAB, the functional marker for sulfate reduction, revealed phylotypes related to spore-forming Desulfotomaculum. No members of the Deltaproteobacteria, comprising the most numerous bacterial group with demonstrated capacity for dissimilatory sulfate reduction, were found. The phylogenetic position of 16S rRNA clones from the mats suggests that this microbial community is a unique consortium, where the energy flow is related to hydrogen of hydrothermal origin, while mass growth of primary produces results from utilization of sulfide formed by sulfate-and sulfur-reducing microorganisms.
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