Glaciecola aquimarina sp. nov., a gammaproteobacterium isolated from coastal seawater.

A Gram-negative, aerobic, non-motile and ovoid or rod-shaped bacterial strain, GGW-M5(T), was isolated from seawater on the southern coast in Korea, and its taxonomic position was investigated by using a polyphasic approach. Strain GGW-M5(T) grew optimally at pH 7.0-8.0, at 30 °C and in the presence of 2 % (w/v) NaCl. A neighbour-joining phylogenetic tree based on 16S rRNA gene sequences revealed that strain GGW-M5(T) belonged to the genus Glaciecola, joining the cluster comprising the type strains of G. agarilytica, G. arctica, G. chathamensis, G. mesophila, G. polaris and G. psychrophila, with which it exhibited 16S rRNA gene sequence similarity values of 95.9-96.7 %. Strain GGW-M5(T) exhibited sequence similarity values of 93.2-94.8 % to the type strains of the other Glaciecola species. Strain GGW-M5(T) contained Q-8 as the predominant ubiquinone and C16:1 ω7c and/or iso-C15:0 2-OH, C16:0 and C14:0 2-OH as the major fatty acids. Major polar lipids were phosphatidylglycerol, phosphatidylethanolamine and diphosphatidylglycerol. The DNA G+C content was 42.4 mol%. Differential phenotypic properties, together with the phylogenetic distinctiveness, demonstrated that strain GGW-M5(T) could be distinguished from other Glaciecola species. On the basis of the data presented, strain GGW-M5(T) is considered to represent a novel species of the genus Glaciecola, for which the name Glaciecola aquimarina sp. nov. is proposed. The type strain is GGW-M5(T) (=KCTC 32108(T) = CCUG 62918(T)).