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In taxonomy, ''Ruegeria'' is a genus of the Rhodobacteraceae.〔 This genus was formerly known as the marine ''Agrobacterium'' before they were reclassified in 1998. It bears in fact the name of Hans-Jürgen Rüger, a German microbiologist, for his contribution to the taxonomy of marine species of ''Agrobacterium''. ==Characteristics== The genus is characterised by members who are: * Gram-negative (like all Proteobacteria) * ovoid to rod-shaped cells 0.6–1.6 × 1.0–4.0 µm * motile by polar flagella, or nonmotile * non-sporeformers * aerobic * oxidase and catalase positive * are incapable of photosynthetic growth * bacteriochlorophyll a is absent * major quinone is ubiquinone 10 * mol% G+C of the DNA is 55–59 * member of the family ''Rhodobacteraceae'', which is phenotypically, metabolically, ecologically diverse and defined based on 16S sequences data Phylogenetically it is very close to the genus ''Silicibacter'', but the two remain separate species due to phenotypic differences — two species for which this is problematic are ''Ruegeria lacuscaerulensis'' and ''Ruegeria pomeroyi''.〔YI (H.), LIM (Y.W.) and CHUN (J.): Taxonomic evaluation of the genera Ruegeria and Silicibacter: a proposal to transfer the genus Silicibacter Petursdottir and Kristjansson 1999 to the genus Ruegeria Uchino et al. 1999. Int. J. Syst. Evol. Microbiol., 2007, 57, 815-819.〕〔MURAMATSU (Y.), UCHINO (Y.), KASAI (H.), SUZUKI (K.) and NAKAGAWA (Y.): Ruegeria mobilis sp. nov., a member of the Alphaproteobacteria isolated in Japan and Palau. Int. J. Syst. Evol. Microbiol., 2007, 57, 1304-1309〕 Two species that have been removed from the genus are Marinovum algicola (Ruegeria algicola) and Thalassobius gelatinovorus (Ruegeria gelatinovora). 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Ruegeria」の詳細全文を読む スポンサード リンク
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