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Abstract

A novel Gram-stain-negative, whitish-yellow, rod-shaped, non-pigmented, aerobic, oxidase-positive and catalase-positive bacterium, designated PX7, was isolated from coastal sediment of Xiaoshi Island, Weihai, China (37° 31′ 36″ N, 122° 00′ 58″ E). Strain PX7 grew optimally at 30 °C, at pH 7.0–7.5 and in the presence of 3.0 % (w/v) NaCl. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain PX7 formed a robust clade with members of the genus Primorskyibacter and was closely related to Primorskyibacter sedentarius , Primorskyibacter aestuariivivens and Primorskyibacter insulae with 96.5, 96.2 and 95.1 % sequence similarities, respectively. The sole respiratory quinone of strain PX7 was ubiquinone-10, and the dominant fatty acid was C18 : 1ω7c (80.2 %). The major polar lipids were phosphatidylglycerol, phosphatidylcholine, phosphatidylethanolamine, one unidentified aminolipid, one unidentified phospholipid and one unidentified lipid. The DNA G+C content of strain PX7 was 60.2 mol%. Based on the combination of phylogenetic analyses, phenotypic and chemotaxonomic data, strain PX7 is considered to represent a novel species within the genus Primorskyibacter in the family Rhodobacteraceae , for which the name Primorskyibacter marinus sp. nov. is proposed. The type strain of the new species is PX7 (=KCTC 42952=MCCC 1H00196).

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2018-08-09
2019-10-19
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