Colwellia arctica sp. nov., isolated from Arctic marine sediment
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Strain 435T, a catalase- and oxidase-positive, beige-pigmented, facultatively anaerobic and Gram-stain-negative marine bacterium, was isolated from marine sediment collected in the Arctic (8°21′629′′E 72°8′827′′N). The cells of the type strain are short- to curve-rods and able to grow at 4–25 °C, pH 6.0–9.0 and in the presence of 0.5–6.0 % (w/v) NaCl. It can reduce nitrate to nitrite. The predominant isoprenoid quinone was identified as Q-8 and the polar lipids are comprised of phosphatidylethanolamine and phosphatidylglycerol. The DNA G+C content is 38.7 mol%. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain 435T belongs to the genus Colwellia. Strain 435T was found to exhibit 92.1–95.6 % 16S rRNA gene sequence similarities with other species of the genus Colwellia. The differential phenotypic properties, together with the phylogenetic and genetic distinctiveness indicated that strain 435T can be considered to represent a novel species, Colwellia arctica sp. nov., of the genus Colwellia. The type strain is 435T (=CICC 10860T = ATCC BAA-2609T).
KeywordsColwellia arctica sp. nov. 16S rRNA gene Polyphasic taxonomy Marine sediment
This work was financially supported by the Chinese Polar Environment Comprehensive Investigation and Assessment Program (CHINARE2012-03-05, CHINARE2013-03-05), Public Science and Technology Research Funds Projects of Ocean (201005032-2) and the National Natural Science Foundation of China (31370057).
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