Arthrobacter ginkgonis sp nov., an actinomycete isolated from rhizosphere of Ginkgo biloba L

A Gram-stain-positive, aerobic actinobacterial strain (designated SYP-A7299(T)), which displayed a rod-coccus growth lifecycle, was isolated from the rhizosphere of Ginkgo biloba L. Phylogenetic analyses based on 16S rRNA gene sequences indicated that strain SYP-A7299(T) belongs to the genus Arthrobacter and is most closely related to Arthrobacter halodurans JSM 078085(T) (97.4% 16S rRNA gene sequence similarity). The DNA-DNA relatedness value between strain SYP-A7299(T) and A. halodurans JSM 078085(T) was 37% +/- 2.9. The cell-wall peptidoglycan was A4 alpha, and glucose and galactose were whole-cell sugars. The polar lipids consisted of diphosphatidylglycerol, phosphatidylglycerol, phosphatidylinositol, two glycolipids and an unknown polar lipid. The major menaquinone were MK-8(H-2) (72 %) and MK-9(H-2) (28 %), and the predominant cellular fatty acids were anteiso-C-15 : 0, iso-C-15 : 0 and anteiso-C-17 : 0. The DNA G+ C content was 68.9 mol%. Based on the morphological, physiological, biochemical and chemotaxonomic characters presented in this study, strain SYP-A7299(T) represents a novel species of the genus Arthrobacter, for which the name Arthrobacter ginkgonis sp. nov. is proposed. The type strain is SYPA7299(T) (=DSM 100491(T)=KCTC 39 592(T)).