Abstract
An aerobic, yellow-pigmented, Gram-negative bacterium, designated strain BD-b365(T), was isolated from sediment of the Hakjang stream in Busan, South Korea. Growth was observed at 15-40 degrees C (optimum 20-30 degrees C) and at pH 6.0-9.5 (optimum pH 7.0-8.0). Cells were non-spore-forming rods that showed gliding motility and contained branched and hydroxy fatty acids. The G+C content of the genomic DNA was 35.4 mol%. The major respiratory quinone was menaquinone-6 (MK-6). The major polar lipid of strain BD-b365(T) was phosphatidylethanolamine. Comparative 16S rRNA gene sequence analysis showed that strain BD-b365(T) formed a distinct phyletic line within the genus Flavobacterium. Based on levels of 16S rRNA gene sequence similarity, the novel strain was related most closely to Flavobacterium aquidurense WB 1.1-56(T), but the level of DNA-DNA relatedness between these two strains was only 9.6 %. On the basis of phenotypic and genotypic data, it is clear that strain BD-b365(T) represents a novel species of the genus Flavobacterium, for which the name Flavobacterium resistens sp. nov. is proposed. The type strain is BD-b365(T) (=KCTC 22078(T) =DSM 19382(T)).
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