Hymenobacter radioduranssp. nov., isolated from soil in the Republic of Korea

초록

A bacterial strain, designated 17J36-26(T), was isolated from the UV-irradiated soil from Jeju Island, South Korea. Cells are Gram negative, strictly aerobic, non-motile, non-spore forming, rod shaped, and catalase and oxidase positive. The major fatty acids of strain 17J36-26(T)were summed feature 4 (17:1 iso I/17:1 anteiso B), summed feature 3 (16:1 omega 6c/16:1 omega 7c), C-16:1 omega 5cand iso-C-15:0. The polar lipid profile contained phosphatidylethanolamine, unidentified aminophospholipid, phospholipids and four unidentified lipids. The G+C content of the strain 17J36-26(T)was 62.6 mol%. The 16S rRNA gene sequence analysis showed that strain 17J36-26(T)was phylogenetically related toHymenobacter qilianensisDK6-37(T)andHymenobacter roseosalivariusAA718(T)(97.5% and 96.8% sequence similarity, respectively). Strain 17J36-26(T)showed resistance to UV radiation. Both average nucleotide identity (ANI) and in silico DNA-DNA hybridization (isDDH) values between strains 17J36-26(T)and type strains ofHymenobacterspecies were lower than the cut-off (>= 95-96% for ANI and >= 70% for isDDH) to define a bacterial new species. The polyphasic approach using genotypic, phenotypic and chemotaxonomic data showed that strain 17J36-26(T)could be distinguished from its phylogenetically related species, and thus, the strain representative of a novel species within the genusHymenobacter, for which the nameHymenobacter radioduranssp. nov. (type strain 17J36-26(T) = KCTC 62269(T) = JCM 33185(T)) is proposed.

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