JOURNAL ARTICLE

Flavobacterium dispersum sp. nov., isolated from a freshwater spring

Wen-Ming Chen, Ching-Ling Su, Shih-Yi Sheu
International Journal of Systematic and Evolutionary Microbiology 2017, 67 (11): 4416-4423
28920840
A novel bacterial strain MVW-23T was isolated from a freshwater spring in Taiwan. The strain was Gram-staining-negative, strictly aerobic, motile by gliding, rod-shaped and formed translucent yellow colonies. Optimal growth occurred at 20-30 °C, pH 7.0, and in the presence of 0.5-1 % NaCl. Phylogenetic analyses based on 16S rRNA gene sequences showed that strain MVW-23T belonged to the genus Flavobacterium and showed the highest levels of sequence similarity with respect to Flavobacterium denitrificans ED5T (97.3 %), Flavobacterium kyungheense THG-107T (97.2 %) and Flavobacterium defluvii EMB117T (97.0 %). Strain MVW-23T contained iso-C15 : 0, summed feature 3 (C16 : 1ω6c and/or C16 : 1ω7c) and iso-C17 : 0 3-OH as the predominant fatty acids. The polar lipid profile consisted of phosphatidylethanolamine, three uncharacterized aminophospholipids and one uncharacterized phospholipid. The major polyamine was homospermidine. The major isoprenoid quinone was MK-6. The DNA G+C content of the genomic DNA was 39.9 mol%. The DNA-DNA hybridization value for strain MVW-23T with F. denitrificans DSM 15936T , F. kyungheense LMG 26575T and F. defluvii DSM 17963T was less than 35 %. Differential phenotypic properties, together with the phylogenetic inference, demonstrate that strain MVW-23T should be classified as a novel species of the genus Flavobacterium, for which the name Flavobacterium dispersum sp. nov. is presented. The type strain is MVW-23T (=BCRC 80978T =LMG 29558T =KCTC 52234T ).

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