Flavobacterium eburneum sp. nov., isolated from reclaimed saline land soil

Woon Mo Hwang, Dohak Kim, Keunsoo Kang, Tae-Young Ahn
International Journal of Systematic and Evolutionary Microbiology 2017, 67 (1): 55-59
A novel Gram-stain-negative, motile by gliding, and aerobic bacterial strain, designated SA31T, was isolated from reclaimed saline land soil near a lake in Taean-gun, South Korea. Cells of the isolate formed ivory-coloured colonies. Growth occurred at 10-35 °C (optimum 25-30 °C), pH 6.0-9.0 (optimum pH 7.0-7.5), and 0-2.0 % (w/v) NaCl (optimum 0 %). Based on similarities of 16S rRNA gene sequences, strain SA31T was mostly affiliated with the genus Flavobacterium, exhibiting the highest sequence similarities with Flavobacterium palustre S44T (96.0 %), Flavobacterium glycines Gm-149T (95.9 %), Flavobacterium defluvii EMB117T (95.7 %) and Flavobacterium daejeonense GH1-10T (95.6 %). Phylogenetic analysis based on 16S rRNA gene sequences also indicated that strain SA31T was clustered with Flavobacterium daejeonense GH1-10T and Flavobacterium glycines Gm-149T. The predominant fatty acids (>7 % of total) of strain SA31T were iso-C15 : 0, summed feature 3 (C16 : 1ω7с and/or C16 : 1ω6с), iso-C17 : 0 3-OH and iso-C15 : 0 3-OH. The major polar lipids of the isolate comprised phosphatidylethanolamine, one unknown aminolipid, one unknown glycolipid, one unknown aminophospholipid and three unknown lipids. The major respiratory quinone was MK-6. The genomic DNA G+C content of strain SA31T was 33.5 mol%. On the basis of phenotypic, chemotaxonomic and phylogenetic analyses, strain SA31T represents a novel species the genus Flavobacterium, for which the name Flavobacterium eburneum sp. nov. is proposed. The type strain is SA31T (=KACC 18743T=JCM 31221T).

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