Maridesulfovibrio

Abstract

Abstract Ma.ri.de.sul.fo.vi'brio. L. neut. n. mare , the sea; N.L. masc. n. Desulfovibrio , a bacterial genus name; N.L. masc. n. Maridesulfovibrio , a Desulfovibrio ‐like bacterium from the sea. Desulfobacterota / Desulfovibrionia / Desulfovibrionales / Desulfovibrionaceae / Maridesulfovibrio Cells are vibrio to rod shaped, 0.5–1.0 × 1.0–5.5 μm. Occur singly, in pairs, or in chains. Spore formation is not observed. Stain Gram‐negative. Cells are motile by a single polar flagellum. Strictly anaerobic, having both respiratory and fermentative types of metabolism. Chemoorganoheterotrophs, using lactate, pyruvate, and often ethanol as electron donors and carbon sources; organic compounds are incompletely oxidized to acetate. Some species can also use fumarate, succinate, malate, choline, fructose, glycerol, and alanine. Propanol and butanol are only oxidized to their corresponding carboxylic acids. H 2 can serve as an electron donor in the presence of acetate as an organic carbon source (chemolithoheterotrophic growth). Growth on formate also requires acetate as a carbon source. Sulfate, sulfite, and often thiosulfate serve as terminal electron acceptors and are reduced to sulfide. Some species use sulfur and fumarate. Reduction of ferric iron is not coupled to growth. In the absence of an external electron acceptor, growth occurs by fermentation of lactate, pyruvate, fumarate (some species), and malate (some species). Desulfoviridin is present. Mesophilic, the optimum temperature for growth is 20–40°C. Neutrophilic (most species) and slightly acidotolerant (one species), the optimum pH for growth is 5.8–7.8. Media containing a reductant are required for growth. Occurs in anoxic sediment of brackish water and marine habitats. DNA G + C content (mol%) : 42.3–47.7 (LC, genome). Type species : Maridesulfovibrio salexigens Waite et al. 2020 VP (basonym: Desulfovibrio salexigens Postgate and Campbell 1966 AL ).