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Abstract

A novel Gram-stain-negative, rod-shaped marine bacterium, designated as strain O448, was isolated from the coastal area of Weihai, China (122° 14′ E, 36° 54′ N). Cells of strain O448 were non-motile, aerobic, approximately 0.4–0.6 µm wide and 1.5–2.0 µm long. Growth occurred at 20–40 °C (optimally between 33–37 °C), pH 6.5–8.0 (optimally at 7.0) and in the presence of 1.0–5.0 % (w/v) NaCl (optimally between 2.0–3.0 %). Phylogenetic analysis based on 16S rRNA gene sequence indicated that strain O448 belongs to family Rhodobacteraceae and exhibits 16S rRNA gene sequence similarities of 94.3, 94.1 and 93.8 % to the type strains of Pontivivens insulae , Halovulum dunhuangense and Maritimibacter alkaliphilus , respectively. The major cellular fatty acid was C18 : 1ω7c and the major polar lipids were phosphatidylethanolamine, phosphatidylcholine and phosphatidylglycerol. Strain O448 contained Q-10 as the sole respiratory quinone. The genomic DNA G+C content was 65.6 mol%. It is evident from phenotypic data and phylogenetic inference that strain O448 represents a novel species in a new genus, for which the name Oceanibiumsediminis gen. nov., sp. nov. is proposed. The type strain is O448 (=KCTC 62076=MCCC 1H00233).

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2018-11-28
2020-05-31
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