脱落酸
油菜素甾醇
细胞生物学
信号转导
转录组
生物
串扰
突变体
适应(眼睛)
化学
拟南芥
生物化学
基因表达
基因
植物
神经科学
物理
光学
作者
Qianqian Li,Fan Xu,Zhuo Chen,Zhenfeng Teng,Kai Sun,Xiancai Li,Jianyuan Yu,Guoxia Zhang,Yan Liang,Xiahe Huang,Lin Du,Yangwen Qian,Yingchun Wang,Chen Chu,Jiuyou Tang
出处
期刊:Nature plants
[Springer Nature]
日期:2021-07-05
卷期号:7 (8): 1108-1118
被引量:55
标识
DOI:10.1038/s41477-021-00959-1
摘要
Complex antagonistic interactions between abscisic acid (ABA) and brassinosteroid (BR) signalling pathways have been widely documented. However, whether or how ABA interacts synergistically with BR in plants remains to be elucidated. Here, we report that low, but not high, concentration of ABA increases lamina joint inclination of rice seedling, which requires functional BR biosynthesis and signalling. Transcriptome analyses confirm that about 60% of low-concentration ABA early response genes can be regulated by BR in the same directions. ABA activates BR signal in a fast, limited and short-term manner and the BR-biosynthesis regulatory gene, OsGSR1, plays a key role during this process, whose expression is induced slightly by ABA through transcriptional factor ABI3. Moreover, the early short-term BR signal activation is also important for ABA-mediated salt stress tolerance. Intriguingly, the process and effect of short-term BR signal activation were covered by high concentration of ABA, implying adaptive mechanisms existed in plants to cope with varying degrees of stress.
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