PEP1 调节了阿尔卑斯山的多年生花期
Renhou Wang1, Sara Farrona, Coral Vincent
1Max Planck Institute for Plant Breeding Research, Carl von Linne Weg 10, D-50829 Cologne, Germany.
Nature
|April 17, 2009
概括
像阿拉比斯阿尔皮纳这样的多年生植物因永久开花1 (pep1) 基因而季节性开花. 这个基因,这个基因.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 进化植物学是进化的植物学.
背景情况:
- 一年一度的植物在一年内完成其生命周期,而多年生植物活了许多年,并多次开花.
- 驱动多年生植物生命周期的机制,包括季节性开花,比一年生植物的理解要少.
- 阿拉比多普西斯 (Arabidopsis thaliana) 是一个典型的一年生植物,而它的亲属阿拉比斯阿尔皮纳 (Arabis alpina) 是多年生植物.
研究的目的:
- 为了研究阿拉比斯阿尔卑斯山的多年生花的遗传基础.
- 了解多年生植物如何调节与季节同步的重复开花周期.
- 为了比较多年生和一年生物种之间的开花调节机制.
主要方法:
- 在Arabis alpina.中永久开花1 (pep1) 突变的识别和特征.
- 在阿拉比斯·阿尔皮纳 (Arabis alpina) 中对PEP1的比较分析和在阿拉比索普西斯·塔利亚纳 (Arabidopsis thaliana) 中的花C (FLC) 分析.
- 检查基因表达模式和染色质修饰.
主要成果:
- 1突变体表现出改变的多年性特征,包括开花时间和分枝.
- PEP1是阿拉比多普西斯FLC的正经体,调节季节性开花反应.
- PEP1表现出寒冷的短暂抑制,使周期性开花,与FLC的稳定抑制不同.
- 显著的染色质修饰模式与PEP1和FLC的差异表达相关.
结论:
- PEP1是多年生植物生命史特征的关键调节者,包括季节性开花.
- PEP1和FLC的染色体调节的差异解释了多年生和一年生物种之间花期控制的差异.
- 这项研究揭示了多年生植物生命周期进化背后的一个关键机制.
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