杂草双色 INDETERMINATE1 是一个保存的初级调节器的开花
Samuel De Riseis1, Junping Chen2, Zhanguo Xin2
1Department of Plant & Microbial Biology, University of California, Berkeley, Berkeley, CA, United States.
Frontiers in plant science
|December 28, 2023
概括
马INDETERMINATE1 (SbId1) 通过调节关键的开花时间基因,对促进开花至关重要. 在SbId1中发生的突变导致花期的显著延迟,突出显示了它在草中保留的作用.
科学领域:
- 植物生物学 植物生物学
- 遗传学 遗传学 是一个
- 分子生物学分子生物学
背景情况:
- 开花是植物的一个关键的发育过渡,通过整合环境和内部线索来调节.
- INDETERMINATE1 (Id1) 基因家族对转录因子进行编码,这些因子对于激活草的开花至关重要,独立于光周期.
- 玉米Id1和大米RID1的功能丧失突变导致花期严重延迟.
研究的目的:
- 调查二色Id1 (SbId1) 同类物在调节开花时间中的功能.
- 描述SbId1突变对开花时间的影响以及中其他开花调节基因的表达.
主要方法:
- 从EMS突变物库中识别并绘制了 (sbid1-1和sbid1-2) 中的两个衰退的晚期开花突变物.
- 在野外和温室条件下,表型评估了由单个和组合的sbid1等位基因引起的开花时间延迟.
- 在sbid1-2突变背景中分析了主要的开花时间调节基因的表达.
主要成果:
- 确定了SbId1 (sbid1-1和sbid1-2) 的两个明显的功能丧失等位基因,导致花期显著延迟.
- 强的sbid1-2等位基因延迟了启动阶段超过60天,而较弱的sbid1-1等位基因导致了35天的延迟.
- SbId1是花激活剂 (例如,SbCO,SbCN8) 和抑制剂 (例如,SbPRR37,SbGhd7) 的表达所需的,这表明它在花调节中的核心作用.
结论:
- SbId1在促进的开花方面发挥着保护和关键的作用.
- 对于大多数主要的开花调节基因的表达,SbId1似乎是必不可少的,这强调了它在过渡到花发育中的基本重要性.
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