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Abstract

A Gram-stain-negative, aerobic, rod-shaped, motile bacterium with a subpolar flagellum, designated strain CCMM005, was isolated from offshore seawater at Qingdao, China. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain CCMM005 belonged to the genus Salinisphaera and exhibited highest 16S rRNA gene sequence similarity to Salinisphaera dokdonensis CL-ES53 (96.9 %). It showed lower sequence similarities (94.9–96.4 %) with all other representatives of the genus Salinisphaera . Optimal growth occurred in the presence of 4 % (w/v) NaCl, at 30 °C and at pH 7.0. The polar lipids of strain CCMM005 consisted of phosphatidylethanolamine, phosphatidylcholine, phosphatidylglycerol, one unidentified phosphoglycolipid and one unidentified phospholipid. The predominant isoprenoid quinone was Q-8. The major fatty acids were C19 : 0cyclo ω8c, C18 : 0 and C18 : 1ω7c. The DNA G+C content of strain CCMM005 was 65.3 mol%. On the basis of data from this polyphasic study, strain CCMM005 is considered to represent a novel species of the genus Salinisphaera , for which the name Salinisphaera aquimarina sp. nov. is proposed. The type strain is CCMM005 (=MCCC 1K03246=KCTC 52640).

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2018-02-16
2019-10-23
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