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Abstract

Strain M1-21 is a Gram-stain-negative, strictly aerobic and short-rod-shaped bacterium, motile by means of a single polar flagellum; it was isolated from freshwater sediment in Korea. It grew at 10–40 °C (optimum 25 °C), pH 6.0–8.0 (optimum pH 7.0) and with 0–0.75 % (w/v) NaCl (optimal growth occurred in the absence of NaCl) on R2A agar, and it accumulated poly-β-hydroxybutyrate granules inside the cells. According to 16S rRNA gene sequence analysis, strain M1-21 showed highest sequence similarity with (94.7 %) and (94.4 %). Phylogenetic analysis of the 16S rRNA gene sequences revealed that strain M1-21 belongs to the genus . The DNA G+C content of strain M1-21 was 61.9 mol%. The predominant respiratory quinone was ubiquinone-8. The major fatty acids (>10 % of the total) were C and summed feature 3 (C 6 and/or C 7), and the major polar lipids were diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. Strain M1-21 showed distinct phenotypic characteristics that differentiated it from species of the genus . Based on these results, strain M1-21 represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is M1-21 (=KACC 19271=JCM 32000).

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2018-03-01
2020-01-24
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