Abstract
A Gram-stain-negative, single polar flagellum bacterium, WZY27T, was isolated from rhizospheric soil of Araceae plants. The results of phylogenetic analysis based on 16S rRNA gene sequences showed that this strain is closely related to Sphingomonas adhaesiva DSM 7418T (97.2 % similarity), Sphingomonaskoreensis KCTC 2883 (97.1 %) and Sphingomonas ginsenosidimutans JCM 17074T (97.0 %). The genomic average nucleotide identity values between strain WZY27T and the above three strains were 75.3, 73.2 and 75.4 %, and the in silico DNA-DNA hybridization values were 19.1 , 20.1 and 20.9 %, respectively. The major fatty acids (>5 %) of strain WZY27T were summed feature 8 (C18 : 1 ω7c/C18 : 1 ω6c), C16 : 0, C14 : 0 2-OH and C18 : 1 ω7c 11-methyl. The predominant respiratory quinone and polyamine were ubiquinone Q-10 and homospermidine, respectively. The polar lipids were diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipids, glycolipids, phosphatidylcholine and sphingoglycolipid. The G+C content of the genomic DNA was 68.4 mol%. Based on the results of genotypic, chemotaxonomic and phenotypic characterization, strain WZY27T represents a novel species of the genus Sphingomonas, for which the name Sphingomonas aracearum sp. nov. is proposed. The type strain is WZY27T (=KCTC 62523T=CCTCC AB 2018056T).
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