文献类型：期刊文献

英文题名：Photocaged abscisic acid enhances rice salt tolerance via sustained signaling and multilevel stress modulation

作者：Yin, Qi[1];Zhang, Yongchao[1];Hu, Yuqian[1];Li, Ang[2];Shi, Lei[3];Shao, Xiaoguang[4];Li, Zhong[1,5];Fu, Wen[1];Shao, Xusheng[1,5,6,7]

机构：[1]East China Univ Sci & Technol, Sch Pharm, Shanghai Key Lab Chem Biol, Shanghai, Peoples R China;[2]Tech Univ Munich, Munich, Germany;[3]Hangzhou Sinotek Qual & Technol Serv Co Ltd, Hangzhou 310052, Zhejiang, Peoples R China;[4]Agr Comprehens Serv Ctr Xiaqiu Town, Yantai, Peoples R China;[5]East China Univ Sci & Technol, State Key Lab Bioreactor Engn, Shanghai, Peoples R China;[6]East China Univ Sci & Technol, Sch Pharm, Shanghai Frontier Sci Res Base Optogenet Tech Cell, Shanghai, Peoples R China;[7]East China Univ Sci & Technol, Engn Res Ctr Pharmaceut Proc Chem, Sch Pharm, Minist Educ, Shanghai, Peoples R China

年份：2026

外文期刊名：PEST MANAGEMENT SCIENCE

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001778842100001)】；

基金：This work was financially supported by the National Natural Science Foundation of China (32472610, 32402439), the Shanghai Frontiers Science Center of Optogenetic Techniques for Cell Metabolism (Shanghai Municipal Education Commission), and the project of National Key Laboratory of Green Pesticide/Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University (SKL-GPL-KF-202405).

语种：英文

外文关键词：abscisic acid; stress responses; photo-caged; gene expression; antioxidant defense

摘要：Background Although abscisic acid (ABA) is essential for improving plant tolerance to salt stress, its practical use in agriculture is severely limited by rapid photodegradation, poor lipophilicity, and short-lived activity. Here, three photo-caged ABA derivatives were developed as light-responsive ABA delivery systems and systematically compared with free ABA.Results All three photo-caged ABA derivatives showed sustained bioactivity in seed germination assays of Arabidopsis thaliana and rice, indicating prolonged ABA action. Under salt stress, NV (4,5-dimethoxy-2-nitrobenzyl bromide4)-ABA performed best. Compared with free ABA, NV-ABA enhanced seedling salt tolerance, promoted chlorophyll recovery, and increased shoot and root fresh weights by 36% and 18%. It also better maintained antioxidant homeostasis and moderate ABA signaling. Sustained expression of OsP5CS1, OsP5CR, OsNHX1, and OsRAB16A supported prolonged stress regulation.Conclusion This study developed a photo-controlled strategy for precise ABA delivery, improving ABA stability and utilization, prolonging bioactivity, and enhancing crop salt tolerance, thus providing a novel approach for ABA application in crop stress regulation.