Flavobacterium zhairuonensis sp. nov., a gliding bacterium isolated from marine sediment of the East China Sea

Sanjit Chandra Debnath; Ahmed Mohammed Abdo Miyah; Can Chen; Huan Sheng; Xue-Wei Xu; Yue-Hong Wu; Dao-Qiong Zheng; Jin-Zhong Xu; Ya-Nan Di; Pin-Mei Wang; Li Shen

doi:10.1007/s12275-019-9194-4

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Flavobacterium zhairuonensis sp. nov., a gliding bacterium isolated from marine sediment of the East China Sea: Sanjit Chandra Debnath ¹⁺, Ahmed Mohammed Abdo Miyah ¹⁺, Can Chen ¹, Huan Sheng ¹, Xue-Wei Xu ^1,2,3, Yue-Hong Wu ^2,3, Dao-Qiong Zheng ¹, Jin-Zhong Xu ¹, Ya-Nan Di ¹, Pin-Mei Wang ¹, Li Shen ¹; Journal of Microbiology 2019;57(12):1065-1072.
DOI: https://doi.org/10.1007/s12275-019-9194-4
Published online: September 27, 2019

¹Ocean College, Zhejiang University, Zhoushan, 316021, P. R. China, ²Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou, 310012, P. R. China, ³Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, P. R. China¹Ocean College, Zhejiang University, Zhoushan, 316021, P. R. China, ²Key Laboratory of Marine Ecosystem and Biogeochemistry, State Oceanic Administration, Hangzhou, 310012, P. R. China, ³Second Institute of Oceanography, Ministry of Natural Resources, Hangzhou, 310012, P. R. China

Corresponding author: Li Shen , Tel: -,

Received: 12 April 2019 • Revised: 19 August 2019 • Accepted: 3 September 2019

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Abstract

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, C15:1 ω6c, iso-C15:0 3-OH, iso-C15:1 G, summed feature 3 (C16:1 ω7c and/or C16:1 ω6c) and summed feature 9 (iso-C17:1 ω9c and/or C16:0 10-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).

Keywords: Flavobacterium zhairuonensis;polyphasic analysis;genome sequence;sediment;East China Sea

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Flavobacterium zhairuonensis sp. nov., a gliding bacterium isolated from marine sediment of the East China Sea

J. Microbiol. 2019;57(12):1065-1072. Published online September 27, 2019

DOI: https://doi.org/10.1007/s12275-019-9194-4

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