Abstract
A novel Gram-staining-negative, non-motile, rod-shaped and aerobic bacterial strain, designated EGI 60015T, was isolated from healthy roots of Glycyrrhiza uralensis F. collected from Yili County, Xinjiang Province, Northwest China. The 16S rRNA gene sequence of strain EGI 60015T was found to show 97.6 % sequence similarity with Novosphingobium pentaromativorans US6-1T. The phylogenetic analysis based on 16S rRNA gene sequences showed that the strain formed a clade with N. pentaromativorans US6-1T in the neighbor-joining tree. Q-10 was identified as the respiratory quinone of strain EGI 60015T. The major fatty acids were summed feature 8 (C18:1 ω6c and/or C18:1 ω7c; 55.04 %), summed feature 4 (C17:1 anteiso B and/or iso I; 18.34 %) and summed feature 3 (C16:1 ω6c and/or C16:1 ω7c; 8.53 %). The polar lipids detected were phosphatidylethanolamine, phosphatidylmethylethanolamine, phosphatidylglycerol, diphosphatidylglycerol, phosphatidylcholine and sphingoglycolipids. The DNA G+C content of strain EGI 60015T was determined to be 66.6 mol%. The genomic DNA relatedness value between EGI 60015T and N. pentaromativorans US6-1T (54 %) was below the 70 % limit for species identification. Based on the result of the molecular studies supported by its morphological, physiological, chemotaxonomic and other differentiating phenotypic characteristics, strain EGI 60015T was considered to represent a novel species within the genus Novosphingobium, for which the name Novosphingobium endophyticum sp. nov. is proposed. The type strain is EGI 60015T (=CGMCC 1.15095T = KCTC 42486T = DSM 29948T).
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Acknowledgments
We are grateful to Prof. Dr. Takuji Kudo (JCM) for providing the reference type strain. This research was supported by the National Natural Science Foundation of China (Nos. 81102806, 31200008 and 31400009), projects of China tobacco Yunnan Industrial Co. Ltd. (Nos. 2012JC07, 2012FL02 and 2014YL01), the Hundred Talents Program of Chinese Academy of Sciences, the High-level Talents Program of Xinjiang Autonomous Region and the West Light Foundation of Chinese Academy of Sciences. W.-J. Li was also supported by Guangdong Province Higher Vocational Colleges & Schools Pearl River Scholar Funded Scheme (2014).
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Communicated by Erko Stackebrandt.
Yan-Qiong Li, Li Li and Wei Chen have contributed equally to this work.
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Li, YQ., Li, L., Chen, W. et al. Novosphingobium endophyticum sp. nov. isolated from roots of Glycyrrhiza uralensis . Arch Microbiol 197, 911–918 (2015). https://doi.org/10.1007/s00203-015-1124-1
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DOI: https://doi.org/10.1007/s00203-015-1124-1