Candidimonas

Can.di.di.mo'nas. L. masc. adj. candidus white; L. fem. n. monas a unit, monad; N.L. fem. n. Candidimonas a unit (rod) that produces white colonies. Proteobacteria / Betaproteobacteria / Burkholderiales / Alcaligenaceae / CandidimonasRods, non‐spore‐forming, Gram‐stain‐negative. Nonmotile or motile by polar flagella. Aerobic or facultatively aerobic chemoorganotrophic respiratory metabolism. Mesophilic with optimal growth at around 30°C. Growth can occur in the psychrophilic range of 1–5°C. Reacts positively for the catalase and cytochrome c oxidase tests. Sole carbon sources include amino acids and organic acids. Glucose can be oxidized or assimilated but not fermented. Anaerobic growth can be observed in the presence of nitrate. Depending on the species, nitrate is reduced to nitrite or nitrogen. The major respiratory quinone is ubiquinone 8, and the DNA G + C content ranges 62–65 mol%. Fatty acid composition is variable among species, with C16:0 predominating in all species, and C17:0 cyclo, summed feature 3 (C16:1 ω7c and/or iso‐C15:0 2‐OH), C18:1 ω7c, and summed feature 2 (C14:0 3‐OH and/or iso‐C16:1 I) represented among the major components in the validly named species. The polar lipids comprise phosphatidylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, and some minor unidentified aminophospholipids and aminolipids. Phylogenetically, the genus Candidimonas belongs to the family Alcaligenaceae. The type species is Candidimonas nitroreducens, and the genus includes also Candidimonas humi and Candidimonas bauzanensis.