Isolation and Characterization of a Thermophilic Sulfate-Reducing Bacterium, Desulfotomaculum thermosapovorans sp. nov.

1 April 1995

journal article
Published by Microbiology Society in International Journal of Systematic and Evolutionary Microbiology

Vol. 45 (2) , 218-221
https://doi.org/10.1099/00207713-45-2-218

Abstract

Strain MLF^T(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 MLF^Tincompletely 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 MLF^Tand other thermophilic Desulfotomaculum species that also oxidize long-chain fatty acids. On the basis of our results, we propose that strain MLF^Tis a member of a new species, Desulfotomaculum thermosapovorans.

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