Zhou LY, Meng X, Zhong YL, Li GY, Du ZJ, Mu DS.
Dokdonia sinensis sp. nov., a flavobacterium isolated from surface seawater.
Int J Syst Evol Microbiol 2020;
70:1617-1622. [PMID:
32228747 DOI:
10.1099/ijsem.0.003949]
[Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A taxonomic study was carried out on strain SH27T, which was isolated from seawater collected around Xiaoshi Island, PR China. Cells of strain SH27T were Gram-stain-negative, non-motile, rod-shaped, orange-pigmented and grew at 15-37 °C (optimum, 28 °C), at pH 6.0-8.0 (pH 7.0) and in 1.0-7.0 % (w/v) NaCl (2.0-3.0 %). The isolate was positive for catalase, but negative for nitrate reduction, oxidase, indole production and urease. Carotenoid pigment was produced. Phylogenetic analysis based on the 16S rRNA gene placed strain SH27T in the genus Dokdonia with the closest relative being Dokdonia donghaensis KCTC 12391T, exhibiting 96.7 % 16S rRNA gene pairwise similarity. The results of genomic comparisons, including average nucleotide identity and digital DNA-DNA hybridization, showed 72.9 and 19.2 % identity to D. donghaensis KCTC 12391T, respectively. The major cellular fatty acids were iso-C15 : 0, iso-C15 : 1 G and iso-C17 : 0 3-OH. The major polar lipids were phosphatidylethanolamine and two unidentified lipids. Menaquinone-6 was the only respiratory quinone. The G+C content of the genomic DNA was 32.9 mol%. On the basis of the phenotypic and phylogenetic data, strain SH27T represents a novel species of the genus Dokdonia, for which the name Dokdonia sinensis sp. nov. is proposed, with the type strain SH27T (MCCC 1H00358T=CCTCC AB 2018323T=KCTC 62962T).
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