Isolation and Characterization of a Thermophilic Sulfate-Reducing Bacterium, Desulfotomaculum thermosapovorans sp. nov.
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Ollivier, B.
Patel, B.
Dwivedi, P.
Magot, M.
Garcia, J.
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Abstract
Strain MLFT(T = type strain), a new thermophilic, spore-forming sulfate-reducing bacterium, was characterized and was found to be phenotypically, genotypically, and phylogenetically related to the genus Desulfotomaculum. This organism was isolated from a butyrate enrichment culture that had been inoculated with a mixed compost containing rice hulls and peanut shells. The optimum temperature for growth was 50°C. The G+C content of the DNA was 51.2 mol%. Strain MLFTincompletely oxidized pyruvate, butyrate, and butanol to acetate and presumably CO2. It used long-chain fatty acids and propanediols. We observed phenotypic and phylogenetic differences between strain MLFTand other thermophilic Desulfotomaculum species that also oxidize long-chain fatty acids. On the basis of our results, we propose that strain MLFTis a member of a new species, Desulfotomaculum thermosapovorans.
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International Journal of Systematic and Evolutionary Microbiology
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45
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2
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Evolutionary Biology
Microbiology
Medical Microbiology