miR164e-NAC32模块通过对DELLA蛋白稳定性的翻译后调节来调节玉米植物的高度
Chuanxi Peng1, Xi Zhao2, Jinzhong Xiao2
1State Key Laboratory of Plant Environmental Resilience, Engineering Research Center of Plant Growth Regulator, Ministry of Education & College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; Key Laboratory of Tobacco Biology and Processing, Ministry of Agriculture and Rural Affairs, Tobacco Research Institute of Chinese Academy of Agricultural Sciences, Qingdao 266101, China.
Plant communications
|December 11, 2025
概括
一个新的微RNA (miRNA) -NAC-DELLA调节网络通过稳定DELLA蛋白来控制玉米茎的生长. 这一发现提供了通过精密育种优化植物架构的目标.
科学领域:
- 植物生物学 植物生物学
- 遗传学 是一个遗传学.
- 分子生物学分子生物学
背景情况:
- 植物结构对于作物产量至关重要,并由内部节点延长来调节.
- 在干发育过程中集成microRNA和植物激素信号的翻译后调节尚未得到充分理解.
研究的目的:
- 阐明控制玉米茎发展的等级 miR164e-NAC32-DELLA 监管网络.
- 了解这种网络功能背后的翻译后机制.
主要方法:
- 在玉米中对ZmmiR164e和ZmNAC32的遗传分析.
- 在ZmNAC32和DELLA蛋白ZmD8.8之间的蛋白质-蛋白质相互作用研究中.
- 转录组分析,以确定下游监管途径.
- 结构分析以确定蛋白质稳定机制.
主要成果:
- ZmmiR164e负面调节ZmNAC32;ZmmiR164e过度表达增强了内部节点的延长,而功能丧失导致矮化.
- ZmNAC32与ZmD8进行物理相互作用,稳定其积累并抑制其降解.
- ZmNAC32的高度调节通过翻译后蛋白质稳定发生,影响GA-响应基因.
- ZmNAC32绑定屏蔽ZmD8残留K399,防止降解.
结论:
- 一个miRNA-NAC-DELLA模块控制了玉米茎发育中的翻译后蛋白质稳定性.
- 本监管模块提供了植物架构精密育种的战略目标.
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