1887

Abstract

A Gram-staining-negative, facultatively aerobic, white-colony-forming bacterium, designated strain SE-S21, was isolated from forest soil of Jeju Island in Korea. Cells were motile rods with a single polar flagellum, showing catalase- and oxidase-positive reactions. Growth was observed at 10–40 °C (optimum, 30 °C), pH 4.0–10.0 (optimum, pH 7.0–7.5) and with 0–4.0 % (w/v) NaCl (optimum, 0–2 %). Only ubiquinone-8 was detected as the isoprenoid quinone, and C, C cyclo, Cω8 cyclo and summed feature 2 (comprising C aldehyde and/or unknown) were found to be the major fatty acids. Phosphatidylethanolamine, diphosphatidylglycerol, phosphatidylglycerol, an unknown aminophospholipid, an unknown aminolipid and an unknown lipid were detected as the major polar lipids. Putrescine and 2-hydroxyputrescine were the predominant polyamines. The DNA G+C content was 61.0 mol%. Phylogenetic analyses based on 16S rRNA and DNA gyrase B gene sequences revealed that strain SE-S21 formed a phyletic lineage within the genus . Strain SE-S21 was most closely related to KOx and CCUG 38742 with 98.8 % and 98.7 % 16S rRNA gene sequence similarities, respectively. However, the DNA–DNA relatedness values between strain SE-S21 and the type strains of and were 26.6±5.7 % and 20.5±3.7 %, respectively. On the basis of phenotypic, chemotaxonomic and molecular features, strain SE-S21 clearly represents a novel species of the genus , for which the name sp. nov. is proposed. The type strain is SE-S21 (=KACC 18127=JCM 30137). An emended description of the genus is also proposed.

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2016-09-01
2020-04-02
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