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Archives of Microbiology

, Volume 161, Issue 4, pp 328–332 | Cite as

Desulfuromonas acetexigens sp. nov., a dissimilatory sulfur-reducing eubacterium from anoxic freshwater sediments

  • Kai Finster
  • Friedhelm Bak
  • Norbert Pfennig
Original Papers

Abstract

Five strains of obligate anaerobic sulfur-reducing eubacteria that exclusively use acetate as energy and carbon source have been enriched and isolated from anoxic sulfide-containing freshwater mud. The strains were unable to grow in the presence of 2% NaCl. Morphologically the strains were not uniform, cells were either rod-shaped or elongated ovoid. All strains were flagellated with a single polar to subpolar flagellum. They stained gram-negative. Two of the strains were studied in detail. Malate or fumarate was used alternatively to elemental sulfur as electron acceptor. The capacity to grow on acetate as sole organic substrate and to reduce elemental sulfur or polysulfide to sulfide are traits in common with the genus Desulfuromonas. The strains differ from Desulfuromonas acetoxidans by their freshwater origin, morphology, metabolic specialization and their DNA base ratio. Therefore we consider the new isolates as a new species for which the name Desulfuromonas acetexigens is proposed.

Key words

Desulfuromonas acetexigens (description) Reduction of elemental sulfur/polysulfide Anoxic freshwater mud Anaerobic acetate oxidation 

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Copyright information

© Springer Verlag 1994

Authors and Affiliations

  • Kai Finster
    • 1
  • Friedhelm Bak
    • 2
  • Norbert Pfennig
    • 3
  1. 1.Institute of Biological Sciences, Department of Microbial EcologyUniversity of ÅrhusÅrhus CDenmark
  2. 2.Max-Planck-Institut für Terrestrische MikrobiologieMarburgGermany
  3. 3.ÜberlingenGermany

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