1887

Abstract

A Gram-stain-negative bacterium, strain BH-SD19, that was isolated from a marine sediment sample collected from the Bohai Sea, was subjected to a polyphasic taxonomic study. Cells of BH-SD19 are non-flagellated, non-gliding, oval-shaped rods, 0.5–1.0 µm wide and 1.0–2.0 µm long. BH-SD19 is strictly aerobic, and oxidase- and catalase-positive. Growth occurs at 15–40 °C (optimum 35 °C), at pH 6.0–8.5 (optimum 7.0–7.5) and with 1–10 % (w/v) NaCl (optimum 2 %). The predominant fatty acids are C19 : 0cyclo ω8c (46.5 %), C16 : 0 (20.3 %) and C18 : 1ω7c and/or C18 : 1ω6c (10.6 %). The major respiratory quinone is Q-10. The major polar lipids are phosphatidylglycerol, phosphatidylethanolamine and an unidentified phospholipid. The DNA G+C content is 64.0 mol%. BH-SD19 shows the highest 16S rRNA sequence similarity to Pontibaca methylaminivorans (95.2 %) and strains of species of the genus Roseovarius (93.4–95.2 %). Sequence similarity values between BH-SD19 and other phylogenetically related species are all below 95.0 %. Phylogenetic trees based on 16S rRNA gene sequences indicate that BH-SD19 forms a distinct lineage and does not join any known genera in the trees. Phenotypic, chemotaxonomic and phylogenetic data indicate that BH-SD19 represents a novel genus and species in the family Rhodobacteraceae , for which the name Pelagivirga sediminicola gen. nov., sp. nov. is proposed. The type strain is BH-SD19 (=CCTCC AB 2017074=KCTC 62202).

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2018-09-17
2024-10-04
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