Abstract
A Gram-negative and aerobic bacterium, designated YIM 77875(T), was isolated from a geothermal soil sample collected at Rehai National Park, Tengchong, Yunnan Province, south-west China. Bacterial growth occurred from 37 to 65°C (optimum 50°C), pH 6.0-8.0 (optimum pH 7.0) and 0-1% NaCl (w/v). Cells were rod-shaped and colonies were convex, circular, smooth, yellow and non-transparent. Phylogenetic analysis based on the 16S rRNA gene sequence indicated that strain YIM 77875(T) belongs to the genus Lysobacter. The 16S rRNA gene sequence similarity values between strain YIM 77875(T) and other species of the genus Lysobacter were all below 94.7%. The polar lipids of strain YIM 77875(T) were diphosphatidylglycerol, phosphatidylglycerol, phosphatidylethanolamine and five unknown phospholipids. The predominant respiratory quinone was Q-8 and the G+C content was 68.8mol%. Major fatty acids were iso-C(16:0), iso-C(15:0) and iso-C(11:0). On the basis of the morphological and chemotaxonomic characteristics, as well as genotypic data, strain YIM 77875(T) represents a novel species, Lysobacter thermophilus sp. nov., in the genus Lysobacter. The type strain is YIM 77875(T) (CCTCC AB 2012064(T)=KCTC 32020(T)).
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