Melatonin activates the OsbZIP79-OsABI5 module that orchestrates nitrogen and ROS homeostasis to alleviate nitrogen-limitation stress in rice
文献类型： 外文期刊
作者： Jiang, Meng 1 ; Song, Yue 1 ; Yang, Ruifang 5 ; Zheng, Chenfan 1 ; Zheng, Yunchao 6 ; Zhang, Huali 7 ; Li, Shan 2 ; Tan, Yuanyuan 2 ; Huang, Jianzhong 1 ; Shu, Qingyao 1 ; Li, Ruiqing 4 ;
作者机构： 1.Zhejiang Univ, Hainan Inst, Yazhou Bay Scitech City, Sanya, Peoples R China
2.Zhejiang Univ, Natl Key Lab Rice Breeding & Biol, Hangzhou, Peoples R China
3.Zhejiang Univ, Zhejiang Prov Key Lab Crop Germplasm, Adv Seed Inst, Hangzhou, Peoples R China
4.Anhui Agr Univ, Coll Agron, Hefei, Peoples R China
5.Shanghai Acad Agr Sci, Crop Breeding & Cultivat Res Inst, Shanghai, Peoples R China
6.Westlake Univ, Sch Life Sci, Hangzhou, Peoples R China
7.China Natl Rice Res Inst, State Key Lab Rice Breeding & Biol, Hangzhou, Peoples R China
8.China Natl Rice Res Inst, Chinese Natl Ctr Rice Improvement, Hangzhou, Peoples R China
关键词： melatonin; peroxidase; nitrogen starvation; allantoinase; ROS signaling
期刊名称：PLANT COMMUNICATIONS （ 影响因子：10.5； 五年影响因子：10.5 ）
ISSN： 2590-3462
年卷期： 2023 年 4 卷 6 期
页码：
收录情况： SCI
摘要： Melatonin (Mel) has previously been reported to effectively alleviate nitrogen-limitation (N-L) stress and thus increase nitrogen-use efficiency (NUE) in several plants, but the underlying mechanism remains obscure. Here, we revealed that OsbZIP79 (BASIC LEUCINE ZIPPER 79) is transcriptionally activated under N-L conditions, and its expression is further enhanced by exogenous Mel. By the combined use of omics, genetics, and biological techniques, we revealed that the OsbZIP79-OsABI5 (ABSCISIC ACID INSENSITIVE 5) module stimulated regulation of reactive oxygen species (ROS) homeostasis and the uptake and meta-bolism of nitrogen under conditions of indoor nitrogen limitation (1/16 normal level). OsbZIP79 activated the transcription of OsABI5, and OsABI5 then bound to the promoters of target genes, including genes involved in ROS homeostasis and nitrogen metabolism, activating their transcription. This module was also indispensable for upregulation of several other genes involved in abscisic acid catabolism, nitrogen uptake, and assimilation under N-L and Mel treatment, although these genes were not directly transactivated by OsABI5. Field experiments demonstrated that Mel significantly improved rice growth under low nitrogen (L-N, half the normal level) by the same mechanism revealed in the nitrogen-limitation study. Mel application produced a 28.6% yield increase under L-N and thus similar increases in NUE. Also, two OsbZIP79- overexpression lines grown in L-N field plots had significantly higher NUE (+13.7% and +21.2%) than their wild types. Together, our data show that an OsbZIP79-OsABI5 module regulates the rice response to N insufficiency (N limitation or low N), which is important for increasing NUE in rice production.
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