GhCOMT33D modulates melatonin synthesis, impacting plant response to Cd2+ in cotton via ROS
文献类型： 外文期刊
作者： Zhang, Menghao 1 ; Chen, Xiugui 1 ; Wang, Ning 3 ; Guan, Lijun 5 ; Wang, Lidong 1 ; Chen, Xiao 1 ; Yang, Zhining 1 ; Sun, Yuping 1 ; Fan, Yapeng 1 ; Meng, Yuan 1 ; Liu, Mengyue 1 ; Chen, Wenhua 1 ; Wu, Fange 1 ; Song, Ruize 1 ; Wang, Shuai 1 ; Lu, Xuke 1 ; Wang, Junjuan 1 ; Guo, Lixue 1 ; Zhao, Lanjie 1 ; Nan, Hongyu 3 ; Zhang, Kunpeng 4 ; Feng, Keyun 3 ; Ye, Wuwei 1 ;
作者机构： 1.Zhengzhou Univ, Chinese Acad Agr Sci, Sch Agr Sci, Inst Cotton Res,State Key Lab Cotton Biobreeding &, Anyang, Henan, Peoples R China
2.Natl Ctr Technol Innovat Comprehens Utilizat Salin, Dongying, Shandong, Peoples R China
3.Gansu Acad Agr Sci, Inst Crop Sci, Lanzhou, Gansu, Peoples R China
4.Anyang Inst Technol, Anyang, Henan, Peoples R China
5.Xinjiang Prod & Construct Corps, Inst Agr Sci, Div 13, Hami, Xinjiang, Peoples R China
期刊名称：PHYSIOLOGIA PLANTARUM （ 影响因子：3.6； 五年影响因子：5.4 ）
ISSN： 0031-9317
年卷期： 2024 年 176 卷 6 期
页码：
收录情况： SCI
摘要： Caffeic acid-3-O-methyltransferase (COMT) serves as the final pivotal enzyme in melatonin biosynthesis and plays a crucial role in governing the synthesis of melatonin in plants. This research used bioinformatics to analyze the phylogenetic relationships, gene structure, and promoter cis-acting elements of the upland cotton COMT gene family members, which it identified as the key gene GhCOMT33D to promote melatonin synthesis and responding to Cd2+ stress. After silencing GhCOMT33D through virus-induced gene silencing (VIGS), cotton seedlings showed less resistance to Cd2+ stress. Under Cd2+ stress, the melatonin content in the silenced plants significantly decreased, while ROS, MDA, and proline accumulated in the plant cells. The stomatal aperture of the leaves was reduced, hindering normal photosynthesis, leading to cotton leaves withering and yellowing, and epidermal cells becoming twisted and deformed, with a large number of gaps appearing. The non-silenced plants had a significantly higher melatonin content and were in better condition, providing important evidence for further research on how plant melatonin enhances the Cd2+ resistance of cotton and its regulatory mechanisms.
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