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Paenibacillus radicis sp nov., an endophytic bacterium isolated from maize root

文献类型： 外文期刊

作者： Gao, Jun-Lian 1 ; Yuan, Mei 2 ; Wang, Xu-Ming 1 ; Qiu, Tian-Lei 1 ; Lv, Fan-Yang 2 ; Yang, Ming-Ming 1 ; Sun, Jian-Gua 1 ;

作者机构： 1.Beijing Acad Agr & Forestry, Beijing Agrobiotechnol Res Ctr, Beijing Municipal Key Lab Agr Gene Resources & Bi, Beijing 100097, Peoples R China

2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Minist Agr, Key Lab Microbial Resources, Beijing 100081, Peoples R China

3.Yangtze Univ, Coll Agr, Jingzhou 434025, Hubei, Peo

期刊名称：INTERNATIONAL JOURNAL OF SYSTEMATIC AND EVOLUTIONARY MICROBIOLOGY （ 影响因子：2.747； 五年影响因子：2.889 ）

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收录情况： SCI

摘要： A novel Gram-stain-positive, aerobic, endospore-forming, and rod-shaped strain designated 694(T) was isolated from surface-sterilized root tissue of a maize planted in the Fangshan District of Beijing, People's Republic of China. A polyphasic taxonomic study was performed on the new isolate. On the basis of 16S rRNA gene sequence similarity studies, this isolate belongs to the genus Paenibacillus. High levels of 16S rRNA gene sequence similarity were found between strain 694(T) and Paenibacillus xinjiangensis DSM 30034(T) (98.5 %) and Paenibacillus glycanilyticus (98.1 %), respectively. However, the DNA-DNA hybridization values between strain 694(T) and its close relatives P. xinjiangensis 16970(T) and Paenibacillus algorifonticola CGMCC 1.10223(T) were 30.0 % and 36.7 % respectively. The DNA G+C content of strain 694(T) was determined to be 46.9 mol%. The predominant respiratory quinone was identified as menaquinone-7 and the polar lipid profile was found to be composed of the major lipids diphosphatidylglycerol, phosphatidylglycerol and phosphatidylethanolamine. The major fatty acids were found to be anteiso-C-15 : 0 (42.1 %), iso-C-15 : 0 (18.4 %), iso-C-16 : 0 (11.2 %) and C-16 : 0 (12.1 %). The results of physiological and biochemical tests and minor differences in the fatty acid profiles allowed a clear phenotypic differentiation of strain 694(T) from the closely related species in the genus Paenibacillus. Strain 694(T) is concluded to represent a novel species within the genus Paenibacillus, for which the name Paenibacillus radicis sp. nov. is proposed, with the type strain 694(T) (=CGMCC 1.15286(T)=DSM 100762(T)).

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