文献类型： 外文期刊
作者： Li, Sijia 1 ; Liu, Ruixian 2 ; Wang, Xiaojing 2 ; Zhao, Liang 2 ; Chen, Jian 4 ; Yang, Changqin 2 ; Zhang, Guowei 2 ; Ni, 1 ;
作者机构： 1.Yangzhou Univ, Coll Biosci & Biotechnol, Yangzhou, Jiangsu, Peoples R China
2.Jiangsu Acad Agr Sci, Inst Ind Crops, Nanjing, Peoples R China
3.Jiangsu Acad Agr Sci, Prov Key Lab Agrobiol, Nanjing, Peoples R China
4.Minist Sci & Technol, Lab Food Qual & Safety, State Key Lab Cultivat Base, Nanjing, Peoples R China
5.Jiangsu Acad Agr Sci, Inst Food Safety & Nutr, Nanjing, Peoples R China
6.Shandong Agr Univ, Coll Plant Protect, Tai An, Shandong, Peoples R China
关键词： Hydrogen peroxide; Leaf abscission; Thidiazuron; Cotton
期刊名称：JOURNAL OF PLANT GROWTH REGULATION （ 影响因子：4.169； 五年影响因子：4.038 ）
ISSN： 0721-7595
年卷期：
页码：
收录情况： SCI
摘要： Thidiazuron (TDZ) has been extensively applied as chemical defoliant in cotton production, but the physiological mechanisms for its defoliating activity are poorly understood. Hydrogen peroxide (H2O2) is regarded as an endogenous regulator of abscission. In the current study, we found that H(2)O(2)was involved in cotton leaf abscission induced by TDZ. TDZ induced water loss, cell death, and oxidative injury in cotton leaf, leading to significant leaf abscission. TDZ treatment induced a significant increase in H(2)O(2)production in the leaf, petiole and abscission zone. Treatment with DPI, a respiratory burst oxidase homologue inhibitor, significantly inhibited TDZ-induced H(2)O(2)generation, coinciding with a remarkable decrease in leaf abscission. TDZ treatment stimulated the expression ofRbohAin the petiole and pulvinus. These results suggest that H(2)O(2)might play an important role in cotton leaf abscission induced by TDZ.
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