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A Gram-negative, psychrophilic, motile, rod-shaped bacterium, designated strain 20188T, was isolated from marine samples collected from the Arctic (7 ° 00′ 24″ N 16 ° 59′ 37″ W), and was identified taxonomically by means of a polyphasic study. On the basis of 16S rRNA gene sequence similarity, strain 20188T was closely related to members of the genera Phaeobacter. 16S rRNA gene sequence similarities between strain 20188T and the type strains of Phaeobacter inhibens, Phaeobacter gallaeciensis and Phaeobacter daeponensis were 97.0, 96.8 and 96.2 %, respectively. The temperature range for growth was 0–25 °C, with optimum growth occurring at 19–20 °C and at approximately pH 6.0–9.0. Strain 20188T had ubiquinone-10 as the major respiratory quinone and C18 : 1 ω7c and 11-methyl C18 : 1 ω7c as major fatty acids. The genomic DNA G+C content was 59.6 mol%. On the basis of phenotypic characteristics, phylogenetic analysis and DNA–DNA relatedness data, strain 20188T is considered to represent a novel species of the genus Phaeobacter, for which the name Phaeobacter arcticus sp. nov. is proposed. The type strain is 20188T (=CGMCC 1.6500T=JCM 14644T).
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International Journal of Systematic and Evolutionary Microbiology vol. 58 , part 6, pp. 1384-1387
Supplementary Table S1. Comparison of the cellular fatty acid content of strain 20188 Twith that of other recognized species of the genus Phaeobacter . [PDF](42 KB)