生物
饥饿反应
信号转导
MYB公司
细胞生物学
调节器
TOR信号
选择性拼接
基因
生物化学
基因亚型
转录因子
作者
Meina Guo,Yuxin Zhang,Xianqing Jia,Xueqing Wang,Hongjie Zhang,Jifeng Liu,Qingshen Yang,Wenyuan Ruan,Keke Yi
出处
期刊:The Plant Cell
[Oxford University Press]
日期:2022-05-30
卷期号:34 (9): 3319-3338
被引量:27
标识
DOI:10.1093/plcell/koac161
摘要
Phosphate (Pi) limitation represents a primary constraint on crop production. To better cope with Pi deficiency stress, plants have evolved multiple adaptive mechanisms for phosphorus acquisition and utilization, including the alteration of growth and the activation of Pi starvation signaling. However, how these strategies are coordinated remains largely unknown. Here, we found that the alternative splicing (AS) of REGULATOR OF LEAF INCLINATION 1 (RLI1) in rice (Oryza sativa) produces two protein isoforms: RLI1a, containing MYB DNA binding domain and RLI1b, containing both MYB and coiled-coil (CC) domains. The absence of a CC domain in RLI1a enables it to activate broader target genes than RLI1b. RLI1a, but not RLI1b, regulates both brassinolide (BL) biosynthesis and signaling by directly activating BL-biosynthesis and signaling genes. Both RLI1a and RLI1b modulate Pi starvation signaling. RLI1 and PHOSPHATE STARVATION RESPONSE 2 function redundantly to regulate Pi starvation signaling and growth in response to Pi deficiency. Furthermore, the AS of RLI1-related genes to produce two isoforms for growth and Pi signaling is widely present in both dicots and monocots. Together, these findings indicate that the AS of RLI1 is an important and functionally conserved strategy to orchestrate Pi starvation signaling and growth to help plants adapt to Pi-limitation stress.
科研通智能强力驱动
Strongly Powered by AbleSci AI