ストライゴラクトン受体DWARF14调节了Arabidopsis的开花时间
Jinrui Bai1,2, Xi Lei1,2, Jinlan Liu1,2
1State Key Laboratory of Chemo/Biosensing and Chemometrics, Hunan Provincial Key Laboratory of Plant Functional Genomics and Developmental Regulation, College of Biology, Hunan University, Changsha 410082, China.
The Plant cell
|September 5, 2024
概括
斯特里戈拉克顿 (SL) 激素信号调节了阿拉比多普西斯的开花时间. 当AtD14受体核局部化时,会稳定TOE1,这会通过抑制FT基因表达来延迟开花.
科学领域:
- 植物生物学 植物生物学
- 激素信号传递 激素信号传递
- 发展条例是一个发展条例.
背景情况:
- 斯特里戈拉克 (SL) 是一种关键的植物激素,调节各种发育过程.
- 该SL信号通路涉及DWARF14 (AtD14) 受体,MAX2和SMXL抑制器.
- SL在控制阿拉比多普西斯花期中的确切作用尚不清楚.
研究的目的:
- 为了阐明strigolactone在调节Arabidopsis的开花时间中的分子机制.
- 研究SL介导的开花控制中的AtD14受体的功能.
- 了解SL信号如何与其他调节途径相互作用以影响花过渡.
主要方法:
- 在SL生物合成 (max3) 和信号传递 (Atd14,max2) 途径中对功能丧失突变的分析.
- 对smxl6/7/8抑制体三重突变现型的表征.
- 研究AtD14的亚细胞局部化及其与TOE1和SMXL7.7的相互作用.
- 评估AtD14对FLOWERING LOCUS T (FT) 发起人活动的影响.
主要成果:
- 在SL生物合成或信号传导中缺乏突变的突变体表现出加速开花.
- 在 smxl6/7/8 抑制器突变中,花期延迟,这表明 SMXL 蛋白抑制花期.
- 核局部化的AtD14对于抑制开花至关重要.
- AtD14直接稳定了TOE1并促进了SMXL7的降解,释放了TOE1以抑制FT转录.
结论:
- 完整的strigolactone生物合成和信号传递对于Arabidopsis的正常开花时间至关重要.
- 核局部化的AtD14通过稳定TOE1并促进SMXL7降解,充当了开花抑制剂.
- 通过AtD14-TOE1-FT调节模块,SL通路提供了激素控制开花的机制.
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