1887

Abstract

A novel Gram-stain-negative, motile, oxidase- and catalase-positive, non-spore-forming, non-pigmented, aerobic bacterium, designated rzy34, was isolated from the sediment of a pond containing farmed Rizhao, China. The strain was able to grow at pH 6–10 (optimum pH 7), 20–40 °C (optimum 30 °C) and in the presence of 1.0–6.0 % NaCl (optimum 1.0–2.0 %). Phylogenetic analysis based on 16S rRNA gene sequences revealed that the nearest relative of strain rzy34 was Y2, with the highest sequence similarity of 96.09 %. Within the genus , it showed the lowest similarity of 92.7 % to . The G+C content of the chromosomal DNA of strain rzy34 was 45.3 mol%. The predominant cellular fatty acids were summed feature 3 (Cω6 and/or Cω7), C, Cω8 and summed feature 8 (Cω6 and/or Cω7). The major respiratory quinone was Q-8. Polar lipid analysis indicated the presence of phosphatidylethanolamine and phosphatidylcholine. On the basis of the phenotypic and phylogenetic characteristics, strain rzy34 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is rzy34(=CGMCC 1.15325=KCTC 42730).

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2016-07-01
2019-12-15
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