Roseovarius aquimarinus sp. nov a slightly halophilic bacterium isolated from seawater

A Gram-stain-negative, non-spore-forming, rod-shaped, motile, facultatively anaerobicbacterium, designated CAU 1059^T, was isolated from a seawater sample from Jeju Island,Republic of Korea. The bacterium grew optimally at 37 °C, at pH 7.0 and in the presence of 2 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences revealed thatstrain CAU 1059^T belonged to the genus Roseovarius. It exhibited only 91.5–96.9 % sequencesimilarity to the type strains of recognized Roseovarius species. Similar to other species of thegenus Roseovarius , strain CAU 1059^T had ubiquinone-10 (Q-10) as the predominantubiquinone and C₁₆ : 0 and summed feature 8 (C₁₈: ₁ω7c/ω6c) as the major fatty acids. Thepolar lipid pattern consisted of diphosphatidylglycerol, phosphatidylglycerol,phosphatidylethanolamine and phosphatidylcholine; three unidentified phospholipids, twoaminolipids, an aminophospholipid and nine other lipids were also found. The G+C content ofthe genomic DNA was 61.9 mol%. On the basis of the data provided, strain CAU 1059^T shouldbe classified as representing a novel species of the genus Roseovarius, for which the nameRoseovarius aquimarinus sp. nov. is proposed. The type strain is CAU 1059^T (5 KCTC32014^T=CCUG 64792^T).