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Bacterial strain BBQ-18T, isolated from a freshwater lake in Taiwan, is characterized using a polyphasic taxonomy approach. Phylogenetic analyses based on 16S rRNA gene sequences and coding sequences of 92 protein clusters indicate that strain BBQ-18T forms a phylogenetic lineage in the genus Flavobacterium. Strain BBQ-18T is most closely related to Flavobacterium alvei HR-AYT with 98.5% 16S rRNA gene sequence similarity. Strain BBQ-18T shows 70.5-89.5% average nucleotide identity and 13.7-38.2% digital DNA-DNA hybridization identity with the type strains of other closely related Flavobacterium species. The strain is Gram-stain negative, strictly aerobic, motile by gliding, rod shaped and formed yellow colonies. Optimal growth occurs at 25 °C, pH 6, and in the absence of NaCl. Strain BBQ-18T contains iso-C15:0, summed feature 3 (C16:1ω6c and/or C16:1ω7c) and anteiso-C15:0 as the predominant fatty acids. The polar lipid profile consists of phosphatidylethanolamine, four uncharacterized aminophospholipids and two uncharacterized phospholipids. The major polyamine is homospermidine. The major isoprenoid quinone is MK-6. The DNA G+C content of the genomic DNA is 33.8%. Differential phenotypic properties, together with the phylogenetic inference, demonstrate that strain BBQ-18T should be classified as a novel species of the genus Flavobacterium, for which the name Flavobacterium undicola sp. nov. is proposed. The type strain is BBQ-18T (= BCRC 81050T = LMG 30052T = KCTC 52810T).


Wen-Ming Chen, Yi-Ru Xie, Soon-Wo Kwon, Shih-Yi Sheu. Flavobacterium undicola sp. nov., isolated from a freshwater lake. Archives of microbiology. 2021 Apr;203(3):989-1000

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PMID: 33108487

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