光合作用
淀粉
褪黑素
叶黄素
抗氧化剂
化学
蔗糖
植物
光合效率
生物
园艺
食品科学
生物化学
神经科学
作者
Feifei Yan,Jingyu Zhang,Weiwei Li,Yanfeng Ding,Qiuyi Zhong,Xihui Xu,Haimin Wei
标识
DOI:10.1016/j.plaphy.2021.03.058
摘要
Melatonin (MT), an important antioxidant existing in plants and animals, has been widely reported to participate in the process of plants coping with stress. In this study, we demonstrated the mechanism of MT enhancing photosynthesis in rice under salt stress. The results showed that MT treatment increased relative water content, sucrose and starch content of rice under salt stress. This was mainly owing to the fact that MT enhanced the net photosynthetic rate and enhanced the absorption and transmission of light energy. The effect of MT on photosynthesis of rice under salt stress conditions was mainly due to the regulation of three processes: maintaining low ROS status by improving the total antioxidant capacity, promoting the xanthophyll cycle and increasing the xanthophyll pool size to dissipate excess light energy, increasing the activities of key photosynthetic enzymes. Taken together, these results provide a mechanism for MT to improve the photosynthetic capacity of rice under salt stress.
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