Sphingomonas paeninsulae sp. nov., isolated from soil sampled at Fildes Peninsula, Antarctica

Strain YZ-8 , isolated from soil sampled at Fildes Peninsula, Antarctica, was found to be a Gram-stain-negative, yellow-pigmented, oxidase- and catalase-positive, non-motile, non-spore-forming, rod-shaped and aerobic bacterium. Strain YZ-8 grewoptimally at pH 7.0 and 20 °C. Tolerance to NaCl was up to 0.3 % (w/v) with optimum growth in the absence of NaCl. Phylogenetic analysis based on 16S rRNA gene sequences indicated that strain YZ-8 belonged to the family . Strain YZ-8 showed the highest sequence similarities to KMM 3882 (94.4 %), JCM 12082 (94.4 %), SN6-9 (94.3 %) and W1-2-1 (94.3 %). The predominant respiratory isoprenoid quinone and polyamine components were identified as ubiquinone Q-10 and -homospermidine, respectively. In addition, carotenoid were also found. The polar lipid profile of the strain YZ-8 was found to contain one phosphatidylethanolamine, an unidentified phospholipid, one diphosphatidylglycerol, one phosphatidylglycerol, two sphingophosphonolipids, one phosphatidylcholine and two unidentified alkali-stable lipids. The G+C content of the genomic DNA was determined to be 58.8 mol%. The main fatty acids were summed feature 8 (comprising C ω7 and/or C ω6 ; 35.4 %), summed feature 3 (comprising C ω7 and/or C ω6 ; 32.6 %) and C 2-OH (7.7 %). On the basis of the evidence presented in this study, a novel species of the genus , sp. nov., is proposed, with the type strain YZ-8 (=CCTCC AB 2017137 =LMG 31027 ).