Ruegeria marina sp. nov., isolated from Marine Sediment
A Gram-negative, neutrophilic and rod-shaped bacterium, strain ZH17T, was isolated from a marine sediment of the East China Sea and subjected to a polyphasic taxonomic characterization. The isolate grew in the presence of 0–7.5 % (w/v) NaCl and at pH 6.5–9.0; optimum growth was observed with 0.5–3.0 % (w/v) NaCl and at pH 7.5. Chemotaxonomic analysis showed ubiquinone-10 as predominant respiratory quinone and C18 : 1 ω7c, 11-methyl C18 : 1 ω7c, C16 : 0, C12 : 0 3-OH and C16 : 0 2-OH as major fatty acids. The genomic DNA G+C content was 63.5 mol%. Comparative 16S rRNA gene sequence analysis revealed that the isolate belongs to the genus Ruegeria. Strain ZH17T exhibited the closest phylogenetic affinity to the type strain of Ruegeria pomeroyi, with 97.2 % sequence similarity, and less than 97 % sequence similarity with respect to other described species of the genus Ruegeria. The DNA–DNA reassociation value between strain ZH17T and R. pomeroyi DSM 15171T was 50.7 %. On the basis of phenotypic and genotypic data, strain ZH17T represents a novel species of the genus Ruegeria, for which the name Ruegeria marina sp. nov. (type strain ZH17T =CGMCC 1.9108T =JCM 16262T) is proposed.