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Int J Syst Evol Microbiol 58 (2008), 833-838; DOI  10.1099/ijs.0.65025-0
© 2008 International Union of Microbiological Societies

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

Anna H. Kaksonen1, Stefan Spring2, Peter Schumann2, Reiner M. Kroppenstedt2 and Jaakko A. Puhakka1

1 Institute of Environmental Engineering and Biotechnology, Tampere University of Technology, Tampere, Finland
2 DSMZ – German Collection of Microorganisms and Cell Cultures, Braunschweig, Germany

Correspondence
Anna H. Kaksonen
anna.kaksonen{at}tut.fi

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 RE35E1T, was rod-shaped and motile. The temperature range for growth was 33–51 °C (optimum 44–46 °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-C15 : 0, iso-C17 : 1{omega}10c and iso-C17 : 0. Strain RE35E1T was related to representatives of the genera Desulfotomaculum and Sporotomaculum, the closest relatives being Desulfotomaculum arcticum DSM 17038T (96.3 % 16S rRNA gene sequence similarity) and Sporotomaculum hydroxybenzoicum DSM 5475T (92.0 % similarity). Strain RE35E1T represents a novel species, for which the name Desulfotomaculum alcoholivorax sp. nov. is proposed. The type strain is RE35E1T (=DSM 16058T=JCM 14019T).

Abbreviations: FBR, fluidized-bed reactor

The GenBank/EMBL/DDBJ accession number for the 16S rRNA gene sequence of strain RE35E1T is AY548778.






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