TMK1介导的辅酶信号调节了顶的差异生长
Min Cao1,2,3, Rong Chen1, Pan Li1,2,3
1Shanghai Center for Plant Stress Biology, Center for Excellence in Molecular Plant Sciences, Chinese Academy of Sciences, Shanghai, China.
Nature
|April 5, 2019
概括
与传统的TIR1/AFB信号通路不同的一种新型辅酶信号通路调节植物生长. 这种机制涉及TMK1,稳定Aux/IAA抑制剂以控制基于auxin水平的顶发育.
科学领域:
- 植物生物学
- 分子信号
- 发育生物学
背景情况:
- 植物激素素对植物生长和发育至关重要.
- 素度各不相同,导致不同的结果,但机制尚不清楚.
- 规范性辅酶信号涉及TIR1/AFB受体.
研究的目的:
- 确定新的辅酶信号机制.
- 了解角发展过程中的差异生长.
- 阐明素水平如何转化为不同的发育结果.
主要方法:
- 在角发育过程中研究了辅酶信号.
- 确定了TMK1在辅酶介导的C端裂变中的作用.
- 分析了TMK1,IAA32,IAA34和ARF转录因子之间的相互作用.
主要成果:
- 发现了一个与TIR1/AFB平行的auxin-TMK1信号通路.
- 这种途径稳定非正规的Aux/IAA抑制剂 (IAA32,IAA34).
- 这条通道在角的侧面运行,由高水平的auxin触发.
结论:
- 辅酶-TMK1通路提供了辅酶信号的并行机制.
- 它允许对复杂发育的auxin度进行差异解释.
- 这种途径稳定了Aux/ IAA抑制剂,抑制了生长,与常规途径相反.
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