Abstract
A Gram-positive, aerobic, non-motile and extremely halophilic bacterial strain, designated K9(T), was isolated from kimchi, a Korean fermented food. The strain was observed as endospore-forming rod-shaped cells showing oxidase and catalase activity. It was found to grow at 10.0-30.0% (w/v) NaCl (optimum, 15.0-20.0%), pH 7.0-8.0 (optimum, pH 7.5) and 15-40°C (optimum, 30°C). The polar lipids of strain K9(T) were identified as phosphatidylglycerol, three unidentified phospholipids and an unidentified glycolipid. The isoprenoid quinone was identified as menaquinone-7. The major cellular fatty acids (>20% of the total) were found to be anteisio-C15:0 and anteisio-C17:0. The cell wall peptidoglycan composition was determined to contain meso-diaminopimelic acid. The G+C content of genomic DNA was determined to be 48.2mol%. Phylogenetic analysis based on the 16S rRNA gene sequence revealed that the isolated strain is closely related to Lentibacillus salinarum AHS-1(T) (96.7% sequence similarity). Based on its phenotypic, chemotaxonomic and phylogenetic data, strain K9(T) is considered to represent a novel species of the genus Lentibacillus, for which the name Lentibacillus kimchii sp. nov., is proposed. The type strain is K9(T) (=KACC 18490(T)=JCM 30234(T)).
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