1887

Abstract

Taxonomic positions of six isolates, which were recovered from two different environments in Jeju, Republic of Korea, were examined by a polyphasic analysis. Cells of the isolates were Gram-reaction-negative, facultatively anaerobic, motile and rod-shaped and showed growth at 4–30 °C, pH 4.0–9.0 and with 0–6 (w/v) NaCl. In phylogenomic analysis based on 92 single-copy core genes, it was shown that the isolates belonged to the genus and formed three distinct sublines within the genus. The isolates shared 16S rRNA gene sequence similarities of 97.9–100 % with one another. The isolates contained ubiquinone-8 was as the major isoprenoid quinone. The major polar lipids were phosphatidylethanolamine, phosphatidylglycerol and an unidentified aminophospholipid. The predominant fatty acids were C and C cyclo. The G+C content of their genomic DNA was 52.8–53.1 %. Average nucleotide identity and digital DNA–DNA hybridization values supported that strains SAP-17 and Lac-M11 represented two new species of the genus , whereas strain SAP-10 was a strain of . Based on the results obtained here, sp. nov. (type strain SAP-17=KCTC 72960=NBRC 114723=CCM 9079) and sp. nov. (type strain Lac-M11=KACC 21743=NBRC 114406) are proposed. Also, an emended description of the genus is given on the basis of our physiological and chemotaxonomic results.

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2021-07-02
2021-08-04
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