Desulfobacterales Kuever et al. 2006
General information
Description and emendation
The order comprises morphologically diverse sulfate-reducing bacteria including cocci, oval, rod-shaped, and curved cells; some may form sarcina-like cell aggregates or multicellular, uniseriately arranged filaments. Many forms are motile by means of single polar flagella; multicellular filaments exhibit gliding motility. Strictly anaerobic chemoorganotrophs, chemolithoheterotrophs, or chemolithoautotrophs with respiratory metabolism; in addition, fermentative abilities are found in some members. With the exception of one isolate (Desulfocapsa sulfexigens), the common electron acceptor is sulfate, which is reduced to sulfide. Sulfite or thiosulfate may be used in addition; a few members also reduce elemental sulfur (or polysulfide) to sulfide, or nitrate to ammonia. Simple organic compounds such as long-chain fatty acids, alcohols, polar aromatic compounds, and in some cases even aliphatic or aromatic hydrocarbons, serve as electron donors and carbon sources. Most members of the family Desulfobacteraceae perform a complete oxidation of organic substrates. Most members of the family Desulfobulbaceae are incomplete oxidizers that form acetate as an end product. Some members can grow chemolithoautotrophically with H2 and sulfate as the source of energy and CO2 as the source of carbon for cell synthesis. Growth by disproportionation of sulfur, thiosulfate, and sulfite may occur. Members are mesophilic or psychrophilic; thermophiles have not been isolated in this order. Cells contain various cytochromes, other redox proteins, and menaquinones. Mesophilic species have been isolated from various aquatic environments, including marine, brackish water, and freshwater habitats. The order comprises the families Desulfobacteraceae and Desulfobulbaceae.
Subdivision(s)
MID | Name | Rank | Taxon ID |
---|---|---|---|
MSG071984 | 'Desulfobacterales bacterium' | Species | |
MSG083832 | 'Desulfobacterales sp.' | Species | |
MSG102125 | 'Desulfosediminicola bacterium' | Species | |
MSG086051 | 'JAABRJ01' | Species | |
M0225040301 | Desulfobacteraceae | Family | 213119 |
M0225040302 | Desulfobulbaceae | Family | 213121 |
M0225040303 | Nitrospinaceae | Family | 407032 |