One aerobic, Gram-stain-negative, rod-shaped bacterium, designated strain RB1R5T, was isolated from Renlongba glacier in Tibet Autonomous Region, China. Growth was observed at 4–25 °C and pH 7.0–8.0. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain RB1R5T belongs to the genus Flavobacterium, and its closest relatives are Flavobacterium luteum IMCC26026T and Flavobacterium psychroterrae CCM 8827T with 97.75 and 97.42% gene sequence similarities, respectively. The average nucleotide identity and DNA–DNA hybridization values between strain RB1R5T and its closest relative Flavobacterium luteum IMCC26026T were 78.02 and 21.8 %, respectively. The major cellular fatty acids were anteiso-C15 : 0 and summed feature 3 (comprising C16:1ω7c/C16:1ω6c). The sole menaquinone was MK-6. The major phospholipid was phosphatidylethanolamine. On the basis of phenotypic, phylogenetic and chemotaxonomic characterizations, strain RB1R5T represents a novel species of the genus Flavobacterium, for which the name Flavobacterium psychrotolerans sp. nov. is proposed. The type strain is RB1R5T (=CGMCC 1.23024T=NBRC 113060T).
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