Deinococcus arcticus sp. nov., isolated from Silene acaulis rhizosphere soil of the Arctic tundra

A Gram-stain-negative, non-motile, aerobic, short rod-shaped bacterium, designated OD32T, was isolated from a soil sample taken from the rhizosphere of Silene acaulis collected from the Arctic tundra. The novel strain, OD32T, was able to grow at 15–37 °C (optimum, 33 °C), pH 6.5–9.5 (pH 7.5–8.0) and 0–0.5 % NaCl (0 %, w/v). A phylogenetic analysis based on 16S rRNA gene sequences revealed that strain OD32T was most closely related to the genus Deinococcus ; it shared the highest sequence similarity (95.7 %) with Deinococcus grandis ATCC 43672T. Genomic DNA G+C content of the strain OD32T was 68.2 mol%. The predominant respiratory quinone was menaquinone 8 (MK-8). The major fatty acids were summed feature 3 (C16 : 1 ω7c/C16 : 1 ω6c), C15 : 1 ω6c, C17 : 1 ω6c, C17 : 0, C16 : 0 and iso-C17 : 0. Based on phylogenetic inference and genotypic characteristics, strain OD32T represents a novel species of the genus Deinococcus , for which the name Deinococcus arcticus sp. nov. is proposed. The type strain is OD32T (=KCTC 33972T=CICC 24671T).