文献类型： 外文期刊

作者： Zhang, Xinhui ¹ ; Xie, Zhicai ¹ ; Lang, Duoyong ³ ; Chu, Yuankui ⁴ ; Cui, Gaochang ¹ ; Jia, Xiaoxia ⁵ ;

作者机构： 1.Ningxia Med Univ, Coll Pharm, Yinchuan, Ningxia, Peoples R China

2.Ningxia Med Univ, Ningxia Engn & Technol Res Ctr Hui Med Moderniza, Lab Hui Ethn Med Modernizat, Ningxia Collaborat Innovat Ctr Hui Med,Minist Edu, Yinchuan 750004, Ningxia, Peoples R China

3.Ningxia Med Univ, Lab Anim Ctr, Yinchuan, Ningxia, Peoples R China

4.Ningxia Med Univ, Gen Hosp Ningxia Med Univ, Dept Lab Med, Yinchuan, Ningxia, Peoples R China

5.Gansu Acad Agr Sci, Potato Res Inst, Lanzhou, Peoples R China

期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：4.5； 五年影响因子：4.576 ）

ISSN： 0031-9317

年卷期：

页码：

收录情况： SCI

摘要： It has been reported that drought stress adversely affects the growth and yield of Glycyrrhiza uralensis, Chinese liquorice, in agricultural production. Bacillus pumilus, an important plant growth-promoting bacterium, play a significant role in improving plant tolerance to abiotic stress. However, the role of Bacillus pumilus G5 in resisting drought stress is largely unknown. In the present study, we found that drought stress significantly inhibited the growth and reduced the biomass of G. uralensis seedlings by restraining C- and N-metabolism, while this could be effectively reversed by B. pumilus G5 inoculation. Specifically, B. pumilus G5 significantly increased the content of primary metabolites such as soluble sugar, soluble protein, and free amino acids by regulating the C and N metabolic processes in G. uralensis seedlings. Moreover, B. pumilus G5 increased the content of glycyrrhizic acid, one of the important secondary metabolites, likely mediated through the increased content of primary metabolites and by recovering the expression of three key enzymes, HMGR, SQS, and beta-AS, in the biosynthesis of glycyrrhizic acid. Interestingly, the regulating effect of B. pumilus G5 inoculation on promoting the accumulation of glycyrrhizic acid and increasing the expression of synthesis-related genes is spatially selective. In summary, our findings suggest that B. pumilus G5 could alleviate adverse effects induced by drought stress on the growth of G. uralensis seedlings by regulating C- and N-metabolisms that further triggered the accumulation of secondary metabolites, and this finally improved the drought tolerance of cultivated G. uralensis seedlings.