 | ||||
DesulfuromonasRANK: GenusTAXONOMY: Bacteria -> Proteobacteria -> delta/epsilon subdivisions -> Deltaproteobacteria -> Desulfuromonadales -> Desulfuromonadaceae -> Desulfuromonas OVERVIEW: Straight or slightly curved rods and elongated ovoid rods, 0.4–0.9 × 1.0–4.0 μm in length. Special resting forms such as spores are not known to occur. Gram negative. Motile, generally by means of a single flagellum located at a lateral or subpolar position; cells exhibit a characteristic propeller-like movement. Some strains have polar flagella. Strictly anaerobic. Possess mainly a respiratory type of metabolism with elemental sulfur serving as the terminal electron acceptor, and being reduced to H2S (dissimilatory sulfur reduction). l-Malate or fumarate may be fermented, giving succinate as the main product in the presence or absence of acetate. Betaine may be fermented to acetate, CO2, and trimethylamine. Optimal growth temperature, 30°C. Colonies on anaerobic agar media are translucent to opaque and either peach-colored or pink. Chemoorganotrophic, using acetate and other simple organic compounds as carbon sources (usually together with CO2) and electron donors; acetate and other substrates are completely oxidized to CO2 via the citric acid cycle as indicated by 2-oxoglutarate dehydrogenase activity. Occur regularly in anoxic sediments of salt lakes and in marine or brackish habitats; have also been enriched from freshwater sediments.The mol% G + C of the DNA is: 54–62.Type species: Desulfuromonas acetoxidans |