Melatonin Alleviates Abscisic Acid Deficiency Inhibition on Photosynthesis and Antioxidant Systems in Rice under Salt Stress  

作　　者：Feiyu Yan Xin Chen Zhenzhen Wang Yuxuan Xia Dehui Zheng Sirui Xue Hongliang Zhao Zhiwei Huang Yuan Niu Guoliang Zhang 

机构地区：[1]School of Life Sciences and Food Engineering,Huaiyin Institute of Technology,Huai’an,223003,China [2]Jianghuai Plain Crop Industry Engineering Research Institute,Huaiyin Institute of Technology,Huai’an,223003,China

出　　处：《Phyton-International Journal of Experimental Botany》2024年第7期1421-1440,共20页国际实验植物学杂志（英文）

基　　金：supported by National Programs for Coordinated Promotion of Major Agricultural Technologies(Grant No.2021-ZYXT-02–1);Key Projects of Key research and Development Programs of Jiangsu Province(Grant No.BE2021323);the“333 Project”Scientific Research Project of Jiangsu Province(Grant No.70);Rural Revitalization Project of Huai’an(Grant No.HAN202312);Talent Introduction Research Project of Huaiyin Institute of Technology(Z301B22504).

摘　　要：Melatonin and abscisic acid,as major plant hormones,play important roles in the physiological and biochemical activities of crops,but the interaction between the two under salt stress is not yet clear.This study investigated the endogenous levels of melatonin and abscisic acid in rice by using exogenous melatonin,abscisic acid,and their synthetic inhibitors,and examined their interactions under salt stress.The research results indicate that melatonin and abscisic acid can improve rice salt tolerance.Melatonin alleviated the salt sensitivity caused by abscisic acid deficiency,increased antioxidant enzyme activity and antioxidant content in rice treated with abscisic acid synth-esis inhibitors,and reduced total reactive oxygen species content and thiobarbituric acid reactive substance accu-mulation.Melatonin also increased the activity of key photosynthetic enzymes and the content of photosynthetic pigments,maintaining the parameters of photosynthetic gas exchange and chlorophyllfluorescence.In summary,melatonin alleviated the effects of abscisic acid deficiency on photosynthesis and antioxidant systems in rice and improved salt tolerance.This study is beneficial for expanding the understanding of melatonin regulation of crop salt tolerance.

关 键 词：MELATONIN abscisic acid salt stress RICE PHOTOSYNTHESIS antioxidant system 

分 类 号：S511[农业科学—作物学]