Desulfobacteraceae

Abstract

Abstract De.sul.fo.bac.te.ra.ce'ae. N.L. masc. n. Desulfobacter , type genus of the family; suff. ‐ aceae , ending to denote a family; N.L. fem. pl. n. Desulfobacteraceae , the family of Desulfobacter . Desulfobacterota / Desulfobacteria / Desulfobacterales / Desulfobacteraceae Cells are oval, vibrio, or rod shaped and occur singly or in pairs. Gram‐stain‐negative. Endospores are not observed. Motile or nonmotile. Strict anaerobes with a respiratory and fermentative (some members) type of metabolism. Chemoorganoheterotrophs (all species) and chemolithoautotrophs (most species). Simple organic compounds can serve as sole electron donors and carbon sources and are oxidized to CO 2 via the anaerobic C 1 ‐pathway (carbon monoxide dehydrogenase [CODH] or Wood–Ljungdahl pathway) or the tricarboxylic acid (TCA) cycle (only the genus Desulfobacter ). The genus “ Desulfamplus ,” whose name is not validly published, is only capable of incomplete substrate oxidation. Chemolithoautotrophic growth on H 2 and CO 2 . Sulfate and often sulfite and thiosulfate can serve as terminal electron acceptors and are reduced to sulfide. Fermentative growth on a few organic compounds might occur. Mesophilic and neutrophilic. The major menaquinones are MK‐7 and MK‐7(H 2 ). The family currently accommodates seven genera with validly published names. Members of this family are found in anoxic sediments of brackish water or marine systems. DNA G + C content (mol%) : 41.3–52.0 (Genome, T m , LC). Type genus : Desulfobacter Widdel 1981, VL7 (Effective publication: Widdel 1980).