Ruegeria

Abstract

AbstractRue.ge'ri.a. N.L. fem. n.Ruegeriahonoring Hans‐Jürgen Rüger, a German microbiologist, for his contribution to the taxonomy of marine species ofAgrobacterium.Proteobacteria / Alphaproteobacteria / Rhodobacterales / Rhodobacteraceae / RuegeriaGram‐negative, aerobic, catalase‐ and oxidase‐ positive rods. Reproduces by normal cell division. Optimal growth typically occurs between 25 and 37°C, 2–3% (w/v) NaCl, and pH 6.5–8.5. Capable of utilizing a large variety of organic carbon sources. Every species tested can utilizel‐tyrosine as a sole source of carbon and energy. Most species can utilize at least one organic acid and at least one carbohydrate as a sole source of carbon and energy. Most species utilize acetate, citrate, malate, pyruvate, succinate, cellobiose, fructose,d‐galactose,d‐glucose, andd‐mannose as sole carbon and energy sources. The major fatty acid is C18:1ω7cor summed feature 8 (C18:1ω7c/ω6c). The major quinone is ubiquinone 10. Abundant in the surface layers of the ocean. Species have been isolated from marine sand, marine sediment, rhizosphere soil of mangrove trees, hot springs, the upper 3,000 m of marine environments, the brine–seawater interface, and the interiors of ark clams (Scapharca broughtonii), oysters, and sea squirts (Halocynthia roretzi). Most species are nonmotile. Members of the classAlphaproteobacteria, familyRhodobacteraceae. The type species isRuegeria atlantica.DNA G + C content (mol%): 55–66.15 (HPLC, thermal denaturation, and/or genome sequencing).Type species:Ruegeria atlantica(Rüger and Höfle 1992) Uchino, Hirata, Yokota and Sugiyama 1999, 2VP(Agrobacterium atlanticumRüger and Höfle 1992, 141).