Exogenous proline mitigates toxic effects of cadmium via the decrease of cadmium accumulation and reestablishment of redox homeostasis in Brassica juncea
文献类型： 外文期刊
作者： Wang, Yuanduo 1 ; Tan, Piaopiao 1 ; Chang, Liang 1 ; Yue, Zheming 1 ; Zeng, Chaozhen 1 ; Li, Mei 4 ; Liu, Zhixiang 1 ; Dong, Xujie 1 ; Yan, Mingli 4 ;
作者机构： 1.Cent South Univ Forestry & Technol, Coll Life Sci & Technol, Hunan Prov Key Lab Forestry Biotechnol, Changsha 410004, Peoples R China
2.Cent South Univ Forestry & Technol, Int Cooperat Base Sci & Technol Innovat Forest Re, Changsha 410004, Peoples R China
3.Hunan Agr Univ, Hunan Prov Key Lab Crop Germplasm Innovat & Utili, Changsha 410128, Peoples R China
4.Hunan Acad Agr Sci, Crop Res Inst, Changsha 410125, Peoples R China
5.Hunan Univ Sci & Technol, Hunan Key Lab Econ Crops Genet Improvement & Inte, Xiangtan 411201, Peoples R China
关键词： Brassica juncea; Cadmium tolerance; Reactive oxygen species; Oxidative stress; Antioxidant enzymes
期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）
ISSN： 1471-2229
年卷期： 2022 年 22 卷 1 期
页码：
收录情况： SCI
摘要： Background As a vital osmoticum, proline has an important role in enhancing the tolerance of plants to environmental stress. It is unclear whether the application of exogenous proline can improve the tolerance of Brassica juncea to cadmium (Cd). Results This study investigated the effects of different concentrations of proline (20, 40, 60, 80, and 100 mg/L) under Cd stress at different times (0 d, 2 d, and 7 d) on the growth and physiology of B. juncea. Treatment with exogenous proline not only increased the content of proline in B. juncea but also alleviated Cd-induced seedling growth inhibition via the maintenance of higher photosynthetic pigment content and cell viability and a decrease in the content of Cd. Moreover, it increased the activities of antioxidant enzymes and the glutathione/glutathione disulfide ratio to reduce the accumulation of reactive oxygen species. Compared with other concentrations, 60 mg/L of exogenous proline was the most effective at mitigating Cd toxicity in B. juncea. Conclusions Exogenous proline treatment enhanced the tolerance to Cd via a decrease in Cd accumulation and reestablishment of the redox homeostasis in B. juncea.
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