Abstract
A Gram-stain-negative, strictly aerobic, non-motile, rod-shaped and yellow-pigmented bacterium, designated strain THG-DN5.5T, was isolated from soil of a Rose of Sharon garden in Daejeon, South Korea. According to 16S rRNA gene sequence comparisons, strain THG-DN5.5T was found to be most closely related to Niabella yanshanensis CCBAU 05354T (97.7 % sequence similarity), Niabella ginsengisoli GR10-1T (97.0 %), 'Niabella terrae' ICM 1-15 (96.0 %), Niabella soli DSM 19437T (95.7 %) and Niabella aquatica RP-2T (95.6 %). The DNA-DNA relatedness between strain THG-DN5.5T and its phylogenetically closest neighbours was below 50.0 %. The DNA G+C content was 43.1 mol%. The major polar lipid of strain THG-DN5.5T was found to be phosphatidylethanolamine. The major fatty acids were identified as C16 : 0, iso-C15 : 0, iso-C15 : 1 G, and iso-C17 : 0 3-OH. MK-7 was the only menaquinone present. These data supported the affiliation of strain THG-DN5.5T to the genus Niabella. Strain THG-DN5.5T was distinguished from related species of the genus Niabellaby physiological and biochemical tests. In conclusion, strain THG-DN5.5T represents a novel species of the genus Niabella, for which the name Niabella hibiscisolisp. nov. is proposed. The type strain is THG-DN5.5T (=KACC 18857T=CCTCC AB 2016086T).
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