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KMID : 0880220190570121065
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Journal of Microbiology
2019 Volume.57 No. 12 p.1065 ~ p.1072
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Flavobacterium zhairuonensis sp. nov., a gliding bacterium isolated from marine sediment of the East China Sea
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Debnath Sanjit Chandra
Miyah Ahmed Mohammed Abdo
Chen Can
Sheng Huan
Xu Xue-Wei
Wu Yue-Hong
Zheng Dao-Qiong
Xu Jin-Zhong
Di Ya-Nan
Wang Pin-Mei
Shen Li
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Abstract
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A yellow pigmented, Gram-stain-negative, aerobic bacterium designated A5.7T was studied to evaluate the taxonomic position following the modern polyphasic approach. The strain was isolated from sediments near Zhairuo Island, which is situated in the East China Sea. Cells were non-spore forming rods without flagella but showed motility by gliding. Growth was observed at 15?35°C (optimum 28°C), pH 6.0?9.0 (optimum pH 6.5) and 0?2% (w/v) NaCl (optimum 0?0.5%) in LB broth. The major respiratory quinone of A5.7T was menaquinone 6. The major polar lipid of A5.7T was phosphatidylethanolamine and the predominant fatty acids (> 5%) were iso-C15:0, iso-C17:0 3-OH, C15:1ω6c, iso-C15:0 3-OH, iso-C15:1 G, summed feature 3 (C16:1ω7c and/or C16:1ω6c) and summed feature 9 (iso-C17:1ω9c and/or C16:010-methyl). Phylogenetic analysis based on 16S rRNA gene sequences showed that the isolate belongs to the genus Flavobacterium and shares the highest sequence similarities with Flavobacterium sharifuzzamanii A7.6T (98.5%), Flavobacterium tistrianum GB 56.1T (98.3%), Flavobacterium nitrogenifigens NXU-44T (97.8%), Flavobacterium anhuiense D3T (97.6%), Flavobacterium ginsenosidimutans THG 01T (97.6%), and Flavobacterium foetidum CJ42T (97.6%). Digital DNA-DNA hybridization and average nucleotide identity values between the strain and its closest phylogenetic neighbors showed the ranges from 19.6 to 34.1% and 73.7 to 87.9%, respectively. Therefore, based on polyphasic characteristics, strain A5.7T represents a novel species of the genus Flavobacterium for which the name Flavobacterium zhairuonensis sp. nov. is proposed. The type strain is A5.7T (= KCTC 62406T = MCCC 1K03494T).
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KEYWORD
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Flavobacterium zhairuonensis, polyphasic analysis, genome sequence, sediment, East China Sea
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