Melatonin Participates in Selenium-Enhanced Cold Tolerance of Cucumber Seedlings

被引：18

作者：

Yang, Ning ^{[1
]}

Sun, Kaining ^{[1
]}

Wang, Xiao ^{[1
]}

Wang, Kean ^{[1
]}

Kong, Xianghua ^{[1
]}

Gao, Jianwei ^{[1
]}

Wen, Dan ^{[1
,2
]}

机构：

[1] Shandong Acad Agr Sci, Huang Huai Hai Reg Sci Observat & Expt Stn Veget, Inst Vegetables Res,Shandong Key Lab Greenhouse V, Minist Agr & Rural Affairs,Shandong Branch,Natl I, Jinan, Peoples R China

[2] Shandong Univ, Sch Life Sci, Key Lab Plant Dev & Environm Adapt Biol, Minist Educ, Qingdao, Peoples R China

来源：

FRONTIERS IN PLANT SCIENCE | 2021年 / 12卷

关键词：

selenium; melatonin; cucumber; cold stress; COMT; INDUCED STRESS TOLERANCE; MORPHOGENESIS; PEROXIDASE; QUALITY; GROWTH; PLANTS; ACID;

D O I：

10.3389/fpls.2021.786043

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

Melatonin is an important and widespread plant hormone. However, the underlying physiological and molecular mechanisms of melatonin as a secondary messenger in improving cold tolerance by selenium are limited. This study investigated the effects of selenite on the cold stress of cucumber seedlings. The results showed that exogenous application of selenite improved the cold tolerance of cucumber seedlings, which was dependent on the concentration effect. In the present experiment, 1 mu M of selenite showed the best effect on alleviating cold stress. Interestingly, we found that in the process of alleviating cold stress, selenite increased the content of endogenous melatonin by regulating the expression of melatonin biosynthesis genes (TDC, T5H, SNAT, and COMT). To determine the interrelation between selenite and melatonin in alleviating cold stress, melatonin synthesis inhibitor p-chlorophenylalanine and melatonin were used for in-depth study. This study provides a theoretical basis for cucumber cultivation and breeding.

引用

页数：11

共 56 条

[1] COMT1 Silencing Aggravates Heat Stress-Induced Reduction in Photosynthesis by Decreasing Chlorophyll Content, Photosystem II Activity, and Electron Transport Efficiency in Tomato [J].