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  • Sphingomonas panacis sp. nov., isolated from rhizosphere of rusty ginseng.

Sphingomonas panacis sp. nov., isolated from rhizosphere of rusty ginseng.

Antonie van Leeuwenhoek (2015-07-15)
Priyanka Singh, Yeon-Ju Kim, Van-An Hoang, Mohamed El-Agamy Farh, Deok-Chun Yang
摘要

The type strain DCY99(T) was isolated from soil collected from a ginseng field in Hwacheon, Republic of Korea. Strain DCY99(T) is Gram-negative, non-spore forming, motile, rod-shaped, and strictly aerobic. The bacteria grow optimally at 25-30 °C and pH 6.0-6.5. Phylogenetically, strain DCY99(T) is most closely related to Sphingomonas oligophenolica JCM 12082(T), followed by Sphingomonas asaccharolytica KCTC 2825(T), Sphingomonas mali KCTC 2826(T), Sphingomonas cynarae JCM17498(T), Sphingomonas pruni KCTC 2824(T), and Sphingomonas glacialis DSM 22294(T). The DNA-DNA relatedness between strain DCY99(T) and S. oligophenolica JCM 12082(T) was 15.6 ± 0.4 %, and the DNA G+C content of strain DCY99(T) was 64.4 mol%. An isoprenoid quinone was detected and identified as ubiquinone Q-10, and sym-homospermidine was identified as the major polyamine of DCY99(T). The major polar lipids were identified as sphingoglycolipid, diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, and phosphatidylcholine. C14:02OH, C16:0, and summed feature 8 (C18:1 ω7c:/C18:1 ω6c) were identified as the major fatty acids present in DCY99(T). The results of physiological and biochemical tests allowed strain DCY99(T) to be differentiated phenotypically from other recognized species belonging to the genus Sphingomonas. Therefore, it is suggested that the newly isolated organism represents a novel species, for which the name Sphingomonas panacis sp. nov. is proposed with the type strain designated as DCY99(T) (=JCM 30806(T) =KCTC 42347(T)).

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