A Gram-staining-positive, catalase-positive, oxidase-negative, non-motile, non-flagellate and rod-shaped bacterium, was designated as DCY81(T), and isolated from soil of a ginseng field in Pocheon province, Republic of Korea. The 16S rRNA gene sequence analysis revealed that strain DCY81(T) belonged to the genus Arthrobacter. Major fatty acid was anteiso-C15:0, while major polar lipids were diphosphatidyglycerol, phatidyglycerol, phosphatidylinositol, monogalactosyldiacylglycerol (GL1), and dimannosyldiacylglycerol (GL2). The dominant quinone was MK-9(H2). The peptidoglycan type was A3α with an L-Lys-L-Ala-L-Thr-L-Ala interpeptide bridge. The DNA-DNA hybridization relatedness between strain DCY81(T) and Arthrobacter siccitolerans LMG 27359(T) (98.2 %), Arthrobacter sulfonivorans JCM 13520(T) (97.81 %), Arthrobacter scleromae DSM 17756(T) (97.59 %), Arthrobacter oxydans KCTC 3383(T) (97.3 %) was 39.1 ± 0.2, 62.2 ± 1.6, 36.8 ± 1.1 and 48.3 ± 1.6 %, respectively which show that the genotypic separation of strain DCY81(T) from the closest reference strain of the genus Arthrobacter. The DNA G+C content was 65.2 mol%. The genotypic analysis, physiological, and chemotaxonomic results indicate that strain DCY81(T) represents a novel species of the genus Arthrobacter. Therefore, Arthrobacter ginsengisoli sp. nov., is proposed as the type strain (=KCTC 29225(T) = JCM 19357(T)).
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