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Desulfotomaculum alcoholivorax sp. nov., a moderately thermophilic, spore-forming, sulfate-reducer isolated from a fluidized-bed reactor treating acidic metal- and sulfate-containing wastewater

, : Desulfotomaculum alcoholivorax sp. nov., a moderately thermophilic, spore-forming, sulfate-reducer isolated from a fluidized-bed reactor treating acidic metal- and sulfate-containing wastewater. International Journal of Systematic and Evolutionary Microbiology 58(Pt 4): 833-838

A moderately thermophilic, Gram-positive, endospore-forming, sulfate-reducing bacterium was isolated from a fluidized-bed reactor treating acidic water containing metal and sulfate. The strain, designated RE35E1(T), was rod-shaped and motile. The temperature range for growth was 33-51 degrees C (optimum 44-46 degrees C) and the pH range was 6.0-7.5 (optimum pH 6.4-7.3). The strain grew optimally without additional NaCl. The electron acceptors were 10 mM sulfate, thiosulfate and elemental sulfur and 1 mM (but not 10 mM) sulfite. Various alcohols and carboxylic acids were utilized as electron donors. Fermentative growth occurred on pyruvate. The cell wall contained meso-diaminopimelic acid, and the major respiratory isoprenoid quinone was menaquinone MK-7. The major whole-cell fatty acids were iso-C-15: 0, iso-C-17: 1 omega 10c and iso-C-17:0. Strain RE35E1(T) was related to representatives of the genera Desulfotomaculum and Sporotomaculum, the closest relatives being Desulfotomaculum arcticum DSM 17038(T) (96.3% 16S rRNA gene sequence similarity) and Sporotomaculum hydroxybenzoicum DSM 5475(T) (92.0% similarity). Strain RE35E1(T) represents a novel species, for which the name Desulfotomaculum alcoholivorax sp. nov. is proposed. The type strain is RE35E1(T) (=DSM 16058(T)=JCM 14019(T)).


PMID: 18398178

DOI: 10.1099/ijs.0.65025-0

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