Variovorax guangxiensis sp nov., an aerobic, 1-aminocyclopropane-1-carboxylate deaminase producing bacterium isolated from banana rhizosphere

文献类型： 外文期刊

第一作者： Gao, Jun-lian

作者： Gao, Jun-lian;Wang, Xu-ming;Qiu, Tian-lei;Li, Ji-wei;Li, Xiu-ai;Chen, Jian;Yuan, Mei;Sun, Jian-guang;Liu, Hong-can

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关键词： Variovorax guangxiensis sp nov.;Taxonomy;1-Aminocyclopropane-1-carboxylate deaminase;Banana rhizosphere

期刊名称：ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY （ 影响因子：2.271； 五年影响因子：2.707 ）

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收录情况： SCI

摘要： A 1-aminocyclopropane-1-carboxylate deaminase producing bacterium, designated GXGD002(T), was isolated from the rhizosphere of banana plants cultivated in Guangxi province, China. Phylogenetic analysis based on 16S rRNA gene sequences revealed that strain GXGD002(T) is a member of the genus Variovorax. High levels of 16S rRNA gene sequence similarity are found between strain GXGD002(T) and Variovorax paradoxus DSM 30034(T) (99.4 %), Variovorax ginsengisoli KCTC 12583(T) (99.1 %), Variovorax boronicumulans KCTC 22010(T) (99.0 %), Variovorax soli DSM18216(T) (98.7 %), Variovorax defluvii DSM 27259(T) (98.1 %) and Variovorax dokdonensis KCTC 12544(T) (97.4 %) respectively. However, the DNA-DNA hybridization values between strain GXGD002(T) and its closely related species V. paradoxus DSM 30034(T), V. ginsengisoli KCTC 12583(T) and V. boronicumulans KCTC 22010(T) were found to be 40.7, 30.9 and 23.7 %, respectively. The DNA G + C content of strain GXGD002(T) was found to be 67.8 mol%. The major fatty acids of strain GXGD002(T) are C-16:0 (20.3 %), C-10:0 3OH (18.4 %), C-17:0 cyclo (18.9 %), C(18:1)w(7)c (12.3 %) and summed feature 3 (13.9 %). The predominant respiratory quinone was identified as ubiquinone-8 (Q-8) and the major polar lipids as phosphatidylethanolamine and phosphatidylglycerol. The results of polyphasic taxonomic study including physiological and biochemical tests, whole-cell SDS-PAGE profiles and chemotaxonomic analysis allowed a clear differentiation of strain GXGD002(T) from the other species in the genus Variovorax. Based on these results, a new species, Variovorax guangxiensis, is proposed. The type strain is GXGD002(T) (=DSM 27352(T) = ACCC 05911(T)).

分类号： Q1

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