Flavobacterium cauense sp. nov., isolated from sediment of a eutrophic lake

A Gram-negative, rod-shaped, yellow-pigmented bacterium, designated strain R2A-7T, was isolated from sediment of the eutrophic Taihu Lake in Jiangsu Province, China. The isolate was subjected to a taxonomic study using a polyphasic approach. Phylogenetic analysis based on the 16S rRNA gene sequences placed strain R2A-7T within the genus Flavobacterium in the family Flavobacteriaceae. The highest sequence similarity was found with Flavobacterium saliperosum (98.3 %), followed by other Flavobacterium species with similarities 5 %) were 15 : 0 iso, 17 : 1 iso ω9c, 17 : 0 iso 3-OH, 15 : 1 iso G and 15 : 0 iso 3-OH. The G+C content of the genomic DNA of strain R2A-7T was 37.7 mol%. The DNA–DNA relatedness value with F. saliperosum CGMCC 1.3801T was 40.6 %. Molecular and phenotypic data suggest that strain R2A-7T represents a novel species within the genus Flavobacterium, for which the name Flavobacterium cauense is proposed. The type strain is R2A-7T (=CGMCC 1.7270T=NBRC 104929T).