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The Endo-beta-1,4-Glucanase of Bacillus amyloliquefaciens Is Required for Optimum Endophytic Colonization of Plants

文献类型： 外文期刊

作者： Fan, Xiaojing 1 ; Yang, Ruixian 2 ; Qiu, Sixin 3 ; Cai, Xueqing 1 ; Zou, Huasong 1 ; Hu, Fangping 1 ;

作者机构： 1.Fujian Agr & Forestry Univ, Coll Plant Protect, Fuzhou 350002, Fujian, Peoples R China

2.Luoyang Inst Sci & Technol, Dept Environm Engn & Chem, Luoyang 471023, Henan, Peoples R China

3.Fujian Acad Agr Sci, Crop Inst, Fuzhou 350013, Fujian, Peoples R China

关键词： Bacillus amyloliquefaciens;colonization;endophytic;endo-beta-1;4-glucanase

期刊名称：JOURNAL OF MICROBIOLOGY AND BIOTECHNOLOGY （ 影响因子：2.351； 五年影响因子：2.65 ）

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收录情况： SCI

摘要： The eglS gene in Bacillus amyloliquefaciens encodes an endo-beta-1,4-glucanase that belongs to glycosyl hydrolase family 5. In this study, a disruption mutant of gene eglS was constructed to examine its role in bacterial adaptation in plants. The mutant TB2(k), eglS gene inactivated bacterial strain, was remarkably impaired in extracellular cellulase activity. When inoculated on Brassica campestris, the TB2(k) population was reduced by more than 60% compared with the wild-type strain in the root, stem, and leaf tissues. Overexpression of eglS in the wild-type strain increased the bacteria population in the plant tissues. Further studies revealed that the transcription level of eglS was correlated with bacterial population. These data demonstrate that endo-beta-1,4-glucanase of B. amyloliquefaciens is required for its optimal endophytic colonization.

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