标志性受体控制布拉西卡系的物种内部和物种间的障碍
Jiabao Huang1,2, Lin Yang1,2, Liu Yang1,2
1State Key Laboratory of Crop Biology, Shandong Agricultural University, Tai'an, China.
Nature
|January 25, 2023
概括
开花植物使用自我不相容性 (SI) 和跨物种障碍物来防止不利的后代. 研究人员发现S-locus受体激酶 (SRK) 和FERONIA (FER) 整合了这些机制,使得Brassicaceae作物能够远程繁殖.
科学领域:
- 植物生殖生物学
- 分子遗传学
- 植物育种
背景情况:
- 开花植物利用生殖前障碍物,包括自我不相容性 (SI) 和跨物种障碍物,以防止产生不利的后代.
- SI,单边不兼容性 (UI),自我兼容性 (SC) 和单边兼容性 (UC) 的机制及其在 Brassicaceae 中的相互联系尚未完全理解.
研究的目的:
- 阐明了Brassicaceae种类内和种类间的生殖障碍的分子机制.
- 研究S-locus受体激酶 (SRK) 和FERONIA (FER) 在整合这些障碍物的作用.
主要方法:
- 研究了S-locus蛋白/S-locus蛋白11 (SCR/SP11) 或UI花粉信号与SI标记中的SRK之间的相互作用.
- 检查了FERONIA (FER) 的招募及其在调节活性氧物种 (ROS) 生产中的作用.
- 分析了SC和UC花粉的花粉外蛋白触发的信号通路,包括氧化物 (NO) 和FER介导的ROS抑制.
主要成果:
- SI花粉决定者SCR/SP11或UI花粉信号与SI雌性决定者SRK结合,招募FER并激活FER介导的ROS生产以排斥不兼容的花粉.
- 从SC和UC花粉中分离的花粉外蛋白分别触发NO和FER,抑制SC的ROS以促进花粉生长.
- 确定SRK和FER是种内 (SI) 和种间 (UI/UC) 生殖障碍的关键整合剂.
结论:
- SRK和FER在Brassicaceae中整合自我不兼容性和跨物种兼容性机制方面发挥着至关重要的作用.
- 了解这些分子通路,可以了解维护物种完整性,并提供Brassicaceae作物中远程繁殖的潜在策略.
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