Nicosulfuron stress on the glyoxalase system and endogenous hormone content in sweet maize seedlings
文献类型： 外文期刊
作者： Wu, Zhen-Xing 1 ; Wang, Jian 2 ; Lin, Xiao-Hu 2 ; Yang, Qing 2 ; Wang, Ting-Zhen 1 ; Chen, Jian-Jian 1 ; Li, Xiang-Nan 1 ; Guan, Yuan 3 ; Lv, Gui-Hua 1 ;
作者机构： 1.Zhejiang Acad Agr Sci, Inst Maize & Featured Upland Crops, Dongyang 322100, Peoples R China
2.Hebei Normal Univ Sci &Technol, Coll Agron & Biotechnol, Hebei Key Lab Crop Stress Biol, Qinhuangdao 066000, Peoples R China
3.Shanghai Acad Agr Sci, Shanghai Engn Res Ctr Specialty Maize, Shanghai 201106, Peoples R China
关键词： Nicosulfuron; Sweet corn; Glyoxalase system; Hormone; Gene expression
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.8； 五年影响因子：5.4 ）
ISSN： 0944-1344
年卷期： 2023 年 30 卷 17 期
页码：
收录情况： SCI
摘要： To reduce the harmful effects of nicosulfuron on sweet corn, the physiological regulation mechanism of sweet corn detoxification was studied. This study analyzed the effects of nicosulfuron stress on the glyoxalase system, hormone content, and key gene expression of nicosulfuron-tolerant "HK301" and nicosulfuron-sensitive "HK320" sweet corn seedling sister lines. After spraying nicosulfuron, the methylglyoxal (MG) content in HK301 increased first and then decreased. Glyoxalase I (GlyI) and glyoxalase II (GlyII) activities, non-enzymatic glutathione (GSH), and the glutathione redox state glutathione/(glutathione + glutathione disulfide) (GSH/(GSH + GSSG)) showed a similar trend as the MG content. Abscisic acid (ABA), gibberellin (GA), and zeatin nucleoside (ZR) also increased first and then decreased, whereas the auxin (IAA) increased continuously. In HK301, all indices after spraying nicosulfuron were significantly greater than those of the control. In HK320, MG accumulation continued to increase after nicosulfuron spraying and GlyI and GlyII activities, and GSH first increased and then decreased after 1 day of stress. The indicators above were significantly greater than the control. The GSH/(GSH + GSSG) ratio showed a decreasing trend and was significantly smaller than the control. Furthermore, ABA and IAA continued to increase, and the GA and ZR first increased and then decreased. Compared with HK320, HK301 significantly upregulated the transcription levels of GlyI and GlyII genes in roots, stems, and leaves. Comprehensive analysis showed that sweet maize seedlings improved their herbicide resistance by changing the glyoxalase system and regulating endogenous hormones. The results provide a theoretical basis for further understanding the response mechanism of the glyoxalase system and the regulation characteristics of endogenous hormones in maize under nicosulfuron stress.
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