Exogenous melatonin alleviates nicosulfuron toxicity by regulating the growth, photosynthetic capacity, and antioxidative defense of sweet corn seedlings

被引：3
作者：
Huang, J. X. [1 ]
Liu, Y. B. [1 ]
Xiao, R. [1 ]
Yu, T. [1 ]
Guo, T. [1 ]
Wang, H. W. [1 ]
Lv, X. L. [1 ]
Li, X. N. [2 ]
Zhu, M. [1 ]
Li, F. H. [1 ]
机构：
[1] Shenyang Agr Univ, Specialty Corn Inst, Coll Agron, Shenyang 110866, Liaoning, Peoples R China
[2] Liaoyuan Farmer Sci & Technol Educ Ctr, Liaoyuan 136200, Jilin, Peoples R China
来源：
PHOTOSYNTHETICA | 2024年 / 62卷 / 01期
关键词：
antioxidative system; herbicide stress; melatonin; photosystem; sweet corn seedlings; INDUCED OXIDATIVE STRESS; FOLIAR APPLICATION; PLANT-RESPONSES; PHOTOSYSTEM-II; TOLERANCE; POSTEMERGENCE; RESISTANCE; MAIZE; PHOTOINHIBITION; PEROXIDASE;
D O I：
10.32615/ps.2024.004
中图分类号：
Q94 [植物学];
学科分类号：
071001 ;
摘要：
Improper use of nicosulfuron (NSF) may induce harmful effects on plants during weed control. Melatonin (MT) regulates photosynthetic and physiological processes in plants. This study aimed to explore the effects of MT on alleviating NSF toxicity by measuring the growth parameters, photosynthetic capacity, and antioxidative responses in sweet corn seedlings. Compared to NSF alone, exogenous MT increased chlorophyll content, transpiration rate, net photosynthetic rate, stomatal conductance, and maximum efficiency of PSII photochemistry, while reduced the activity of ascorbate peroxidase and the expression levels of ZmAPX1, ZmAPX2, ZmALS1, and ZmCYP81A9. The inhibition of p-chlorophenylalanine inhibited the positive effects of MT on photosynthetic and physiological indexes. The results indicated that pretreatment with MT might effectively mitigate NSF toxicity in sweet corn seedlings.
引用
收藏
页码：58 / 70
页数：13
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