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Abstract

A Gram-stain-negative, strictly aerobic, oxidase- and catalase-positive, non-gliding, motile with a single polar flagellum, and short rod-shaped bacterial strain, designated XYN52, was isolated from a freshwater lake in the west of China. Phylogenetic analysis of the 16S rRNA gene determined that strain XYN52 was a member of the genus Pelagibacterium within the family Hyphomicrobiaceae . Strain XYN52 was able to grow at 4–37 °C (optimum, 30 °C), pH 6.0–9.0 (pH 7.5) and in the presence of up to 7.0 % w/v NaCl (0.5 %).The major quinone was ubiquinone 10. The major cellular fatty acids were C18 : 1ω6c/C18 : 1ω7c, C19 : 0ω8c cyclo and 11-methyl C18 : 1ω7c. The major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and three kinds of glycolipids. The genomic DNA G+C content was 64.5 mol%. On the basis of these data, strain XYN52 represents a novel species in the genus Pelagibacterium , for which the name Pelagibacterium lacus sp. nov. is proposed. The type strain is XYN52 (=KCTC 62845=MCCC 1H00348).

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2019-04-17
2019-09-22
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