期刊
PLANT PHYSIOLOGY AND BIOCHEMISTRY
卷 165, 期 -, 页码 239-250出版社
ELSEVIER FRANCE-EDITIONS SCIENTIFIQUES MEDICALES ELSEVIER
DOI: 10.1016/j.plaphy.2021.05.003
关键词
Melatonin pretreatment; Rice; Reactive oxygen species; Salt stress; Antioxidant system
资金
- National Key Research and Development Program of China [2017YFD0301200, 2018YFD0300803]
- Key Research and Development Program of Jiangsu Province [BE2017369]
- Jiangsu Agriculture Science and Technology Innovation Fund [CX(18) 1002]
Melatonin plays a crucial role in mediating various physiological processes in plants and is particularly important in protecting plants from abiotic stress. This study found that melatonin improved the antioxidant capacity of rice under salt stress by alleviating growth inhibition and reducing membrane damage. Additionally, melatonin influenced the activity and content of antioxidant enzymes in rice during different stages of salt stress.
Melatonin mediates multiple physiological processes in plants and is involved in many reactions related to the protection of plants from abiotic stress. In this paper, the effect of melatonin on the antioxidant capacity of rice under salt stress was studied. Melatonin alleviated the inhibition of salt stress on the growth of rice seedlings, mainly by increasing the dry weight and fresh weight of shoots and roots. Melatonin alleviated the membrane damage caused by salt stress, which was mainly manifested by the decrease of TBARS content and the decrease of leaf and root damage. During the whole salt stress period, rice after melatonin pretreatment showed lower ROS (H2O2, O-2(center dot-),OH-) accumulation. In the early stage (1-3 d) of stress, the rice after melatonin pretreatment showed a strong increase in antioxidant enzyme activity, while in the later stage (5,7 d), it showed a strong increase in antioxidant content. During the whole period of salt stress, melatonin had a weak regulatory effect on AsA-GSH cycle. Through the above regulation process, the decreasing effect of melatonin on ROS content of rice under salt stress did not decrease with prolonged stress time in a short time (1-7 d). In conclusion, melatonin improved the antioxidant capacity of rice under continuous salt stress, and rice showed variable antioxidant strategies after melatonin pretreatment.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据