文献类型： 外文期刊

作者： Lang, Duoyong ³ ; Yu, Xiaxia ¹ ; Jia, Xiaoxia ⁴ ; Li, Zhixian ⁵ ; Zhang, Xinhui ¹ ;

作者机构： 1.Ningxia Med Univ, Coll Pharm, Yinchuan 750004, Ningxia, Peoples R China

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

3.Ningxia Med Univ, Lab Anim Ctr, Yinchuan 750004, Ningxia, Peoples R China

4.Gansu Acad Agr Sci, Potato Res Inst, Lanzhou 730000, Peoples R China

5.Hunan Univ Sci & Technol, Hunan Prov Key Lab Coal Resource Clean Utilizat &, Xiangtan 411201, Hunan, Peoples R China

关键词： G. uralensis; Methyl jasmonate; Antioxidant system; Carbon and nitrogen metabolisms; Salt stress

期刊名称：SCIENTIA HORTICULTURAE （ 影响因子：3.463； 五年影响因子：3.672 ）

ISSN： 0304-4238

年卷期： 2020 年 266 卷

页码：

收录情况： SCI

摘要： Background and Aims: Salinity is one of the major factors that affect growth and metabolism in plants. However, limited information is available on the influence of methyl jasmonate (MeJA) on antioxidant defense, carbon (C) and nitrogen (N) metabolisms in Glycyrrhiza uralensis Fisch. (G. uralensis) under salt stress. Here, this experiment was conducted to investigated the responses of antioxidant defense, C and N metabolisms of salt-stressed G. uralensis to MeJA at different concentrations. Methods: G.uralensis plant seeds were grown under six conditions: control, 200 mM NaCl, and 200 mM NaCl combined with 15, 30, 45 and 60 mu M MeJA. Key Results: Results showed that salt stress inhibited G. uralensis growth and this adverse effect was reversed by MeJA at different concentrations. MeJA also affected antioxidant system and C and N metabolisms. In general, MeJA from 45 to 60 mu M significantly enhanced superoxide dismutase (SOD), ascorbate peroxidase (APX) and glutathione peroxidase (GPX) activities in salt-stressed G. uralensis seedlings, MeJA from 15 to 30 mu M increased peroxidases (POD) and catalase (CAT) activities, and ascorbate peroxidase (AsA) and glutathione (GSH) contents. Thus, these changes caused a decrease in hydrogen peroxide (H2O2), superoxide radical (O-2(-)) and malondialdehyde (MDA) contents correspondingly. Moreover, 60 mu M MeJA enhanced sucrose synthase (SS), sucrose phosphate synthase (SPS) and nitrate reductase (NR) activities in salt-stressed G. uralensis seedlings. Conclusions: MeJA promoted growth of salt-stressed G. uralensis seedlings by alleviating oxidative stress and strengthening C and N metabolism, these effect depended on the applied concentrations of MeJA.