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Abstract

Strain ICH-30 was isolated from a freshwater fish pond in Taiwan. Phylogenetic analyses based on 16S rRNA gene sequences and coding sequences of 92 protein clusters indicated that strain ICH-30 formed a phylogenetic lineage in the genus Flavobacterium . Strain ICH-30 was most closely related to Flavobacteriumlacus NP180 with 97.0 % 16S rRNA gene sequence similarity. Strain ICH-30 showed 70.0–83.1 % average nucleotide identity and 16.5–23.7 % digital DNA–DNA hybridization identity with the type strains of other closely related Flavobacterium species. Cells of strain ICH-30 were Gram-stain-negative, strictly aerobic, non-motile, rod-shaped and formed dark orange colonies. Optimal growth occurred at 20–30 °C, pH 8–9 and 0–0.5 % NaCl. Strain ICH-30 contained iso-C15 : 1 G and iso-C15 : 0 as the predominant fatty acids. The major hydroxyl fatty acids were iso-C17 : 0 3-OH, iso-C16 : 0 3-OH and iso-C15 : 0 3-OH. The polar lipid profile consisted of phosphatidylethanolamine, six uncharacterized aminophospholipids, one uncharacterized phospholipid and two uncharacterized lipids. The major polyamine was homospermidine. The only isoprenoid quinone was MK-6. The DNA G+C content of the genomic DNA was 34.3 mol%. On the basis of the phylogenetic inference and phenotypic data, strain ICH-30 should be classified as a novel species, for which the name Flavobacterium piscinae sp. nov. is proposed. The type strain is ICH-30 (=BCRC 81122=LMG 30579=KCTC 62513).

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2019-04-08
2019-09-15
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