Marinomonas arctica sp. nov., a psychrotolerant bacterium isolated from the Arctic

A novel psychrotolerant, Gram-negative, motile bacterium, designated strain 328^T, was isolated from sea-ice samples collected off the Canadian Basin of the Arctic Ocean (7 ° 23' 14'' N 14 ° 06' 55'' W). Strain 328^T was able to grow at 0–37 °C, with optimum growth at 25–27 °C. It possessed phosphatidylethanolamine and phosphatidylglycerol as major phospholipids and C_{10 : 0} 3-OH (31.78 %), C_{18 : 1}ω7c (27.50 %) and iso-C_{15 : 0} 2-OH and/or C_{16 : 1}ω7c (19.22 %) as predominant cellular fatty acids. The DNA G+C content of strain 328^T was 45.2 mol%. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain 328^T was a member of the genus Marinomonas (92.7–96.0 % 16S rRNA gene sequence similarity). On the basis of phenotypic, chemotaxonomic and phylogenetic distinctiveness, strain 328^T was considered to represent a novel species of the genus Marinomonas. The name Marinomonas arctica sp. nov. is proposed, with strain 328^T (=CGMCC 1.6498^T=JCM 14976^T) as the type strain.