1887

Abstract

A facultatively anaerobic, Gram-stain-negative, non-motile and straight to slightly curved long rod-shaped bacterial strain, designated XSD2, was isolated from coastal seawater of Xiaoshi Island, PR China. The cells were catalase-positive, oxidase-negative and non-flagellated. Strain XSD2 was found to grow at 20–40 °C (optimum, 33 °C), at pH 6.0–8.5 (pH 7.0–7.5) and with 1–5 % (w/v) NaCl (3 %). Carotenoid pigments were produced. The major cellular fatty acids (>10.0 %) were iso-C, iso-C 3-OH and Cω6 and the major polar lipids were phosphatidylethanolamine, one unidentified aminolipid and three unidentified polar lipids. The sole respiratory quinone was MK-7 and the genomic DNA G+C content was 44.1 mol%. The result of the 16S rRNA gene sequence analysis confirmed the affiliation of this organism to the order , family , with SY21 as its closest relative with only 93.6 % sequence similarity. On the basis of physiological, biochemical and chemotaxonomic characteristics, we propose that strain XSD2 (=KCTC 62994=MCCC 1H00347) represents a novel species of a novel genus in the family , for which the name gen. nov., sp. nov. is proposed.

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2019-08-01
2019-09-22
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