sp. nov., isolated from Arctic tundra soil.

A Gram-stain-negative, rod-shaped, green-pigmented, aerobic and motile bacterium, strain R3-44, was isolated from Arctic tundra soil. Stain R3-44 clustered closely with members of the genus , which belongs to the family , and showed the highest 16S rRNA sequence similarity to AR2 (96.10%). Strain R3-44 grew optimally at pH 7.0, 28 °C and in the presence of 0-0.5 % (w/v) NaCl. The predominant respiratory isoprenoid quinone of strain R3-44 was identified as ubiquinone Q-8. The polar lipids consisted of phosphatidylglycerol, phosphatidylethanolamine, unidentified aminolipid and unidentified phospholipid. The main fatty acids were summed feature 3 (comprising C ω7 and/or C ω6, 40.6 %) and C (29.3 %). The DNA G+C content of strain R3-44 was 60.8 mol%. On the basis of the evidence presented in this study, strain R3-44 represents a novel species of the genus , for which the name sp. nov. is proposed, with the type strain R3-44 (=CCTCC AB 2010422=KCTC 72602).