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INDETERMINATE1与MYB31和TCP协调,以推动温带玉米的自主路径中的花过渡
Qingqian Zhou1, Yongtian Qin2, Yibo Li1
1State Key Laboratory of High-Efficiency Production of Wheat-Maize Double Cropping/College of Agronomy/The Shennong Laboratory, Henan Agricultural University, Zhengzhou 450046, China.
Plant physiology
|March 4, 2026
概括
INDETERMINATE1 (ID1) 通过激活两个途径来协调玉米的开花时间:一个涉及MADS67的途径,另一个激活SBP20以调节ZCN8,确保强大的花过渡.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 发展生物学 发展生物学
背景情况:
- 开花过渡对于植物繁殖至关重要.
- INDETERMINATE1 (ID1) 是单花的关键转录因子.
- ID1在玉米花过渡中的确切作用尚未完全理解.
研究的目的:
- 阐明ID1在玉米中调节花过渡的分子机制.
- 描述一种新的花过渡缺陷突变 (ftd1) 的功能.
主要方法:
- 基于地图的克隆和基因补充来识别ftd1基因.
- 全基因组结合和转录组分析以确定ID1目标.
- 生物化学测试用于研究蛋白质相互作用和转录激活.
主要成果:
- ftd1突变是ID1的等位基因,证实了ID1在花过渡中的作用.
- ID1作为转录激活剂,与GTC核心动机结合.
- ID1调节MADS67和SBP20,而SBP20直接对ZCN8.8进行上调.
- ID1与MYB31和TCP转录因子相互作用,协同激活MADS67.
结论:
- ID1通过一个涉及MADS67和SBP20-ZCN8.8的双路径模型控制玉米的开花.
- ID1的法规确保了对玉米的开花时间的严格控制.
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