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Roseomonas arctica sp. nov., isolated from arctic glacial foreland soil.

A novel psychrotolerant bacterium, designed strain M6-79(T), was isolated from an arctic glacial foreland soil sample collected from Ny-Ålesund in the Svalbard Archipelago, Norway. Cells of strain M6-79(T) were Gram-stain-negative, rod-shaped and produced a red-pigment. Strain M6-79(T) was strictly aerobic, non-motile, non-endospore-forming, oxidase-negative and catalase-positive. Based on 16S rRNA gene sequence analysis, strain M6-79(T) was phylogenetically related to Roseomonas aquatica TR53(T) (95.2 % 16S rRNA gene sequence similarity), Roseomonas lacus TH-G33(T) (94.3 %), 'Roseomonas sediminicola' FW-3 (94.3 %), Roseomonas terrae DS-48(T) (94.1 %) and Roseomonas soli 5N26(T) (94.1 %). The unique isoprenoid quinone detected in strain M6-79(T) was Q-9. The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine, phosphatidylcholine, one unknown aminolipid and one unknown lipid. Strain M6-79(T) possessed C18 : 1ω7c, C16 : 0 and summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) as the predominant fatty acids, and the DNA G+C content was 71.2 mol%. Combined data from phylogenetic, phenotypic and chemotaxonomic studies revealed that strain M6-79(T) represents a novel species of the genus Roseomonas, for which the name Roseomonas arctica sp. nov. is proposed. The type strain is strain M6-79(T) ( = CCTCC AB 2013101(T) = LMG 28251(T)).

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