Flavobacterium notoginsengisoli sp. nov., isolated from the rhizosphere of Panax notoginseng
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Two novel bacterial strains, designated SYP-B540T and SYP-B556, were isolated from rhizospheric soil of Panax notoginseng located at Yunnan Province, China. Both strains were Gram-staining negative, aerobic, non-motile, elongated rod shaped and yellow coloured. They grew optimally at 28 °C and pH 7.0. Analysis of 16S rRNA gene sequences showed that the two strains shared 99.8 % sequence similarity to each other, but lower than 97.6 % to the other known species of the genus Flavobacterium. The predominant respiratory quinone for the two strains was MK-6, and the major fatty acids were iso-C15:0 and summed Feature 3 (comprising 16:1 ω7c and/or 16:1 ω6c). The polar lipids consisted of phosphatidylethanolamine, two unidentified polar lipids and three unidentified amino-phospholipids. The DNA G+C contents of strains SYP-B540T and SYP-B556 were 33.3 and 32.7 mol%, respectively. In addition, the DNA–DNA hybridization values of strains SYP-B540T and SYP-B556 to their closest phylogenetic neighbors were significantly lower than 70 %. On the basis of the polyphasic taxonomy studies, strains SYP-B540T and SYP-B556 represent a novel species of the genus Flavobacterium, for which the name Flavobacterium notoginsengisoli sp. nov. is proposed. The type strain is SYP-B540T (=KCTC 32505T = NBRC 110012T = BCRC 80724T).
KeywordsFlavobacterium notoginsengisoli sp. nov. Rhizosphere Panax notoginseng Polyphasic taxonomy
The authors are grateful to Prof. Dr. Takuji Kudo (JCM) and Miss Sang Mi Lee (KCTC) for their kind providing reference type strain. This research was supported by Key Project of Yunnan Provincial Natural Science Foundation (2013FC008). W-J Li was also supported by Project Supported by Guangdong Province Higher Vocational Colleges & Schools Pearl River Scholar Funded Scheme (2014).
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