LsMAPK6酸化LsCO蛋白,增强其稳定性和转录活性,促进在高温下在生菜中的花过渡
Tingzhen Wang1, Mingjia Liu1, Yufeng Tian1
1Beijing Key Laboratory of New Technology in Agricultural Application, National Demonstration Center for Experimental Plant Production Education, Plant Science and Technology College, Beijing University of Agriculture, Beijing, China.
Plant biotechnology journal
|March 7, 2026
概括
高温加快了生菜的开花,降低了产量. 科学家发现LsMAPK6蛋白通过与LsCO相互作用来积极调节这一过程,为气候适应性作物提供了目标.
科学领域:
- 植物生物学 植物生物学
- 分子遗传学 分子遗传学
- 农作物科学 农作物科学
背景情况:
- 升高的温度加快了生菜中的花转变,导致了显著的产量损失.
- 了解花期的遗传控制对于生菜繁殖和农业生产率至关重要.
研究的目的:
- 为了研究基因激活蛋白激酶 (LsMAPK6) 在高温下调节菜中的花过渡的作用.
- 阐明LsMAPK6影响开花时间的分子机制.
主要方法:
- 对lsmapk6突变体和lsMAPK6过度表达线的分析,以评估开花时间.
- 通过共免疫沉研究LsMAPK6和LsCO之间的物理相互作用.
- 地点定向的突变发生和模仿/无活性分析,以确定酸化地点及其对LsCO功能的影响.
- 检查下游对LsFT介导的开花路径的影响.
主要成果:
- 随着温度升高,lsMAPK6的表达和酸化增加,促进了花过渡.
- lsMAPK6突变显示延迟螺栓和开花,而LsMAPK6过度表达加快了这些过程.
- LsMAPK6在物理上与LsCO相互作用,而LsCO的淘汰在很大程度上是lsmapk6突变体的复制物.
- LsMAPK6在Ser-258中酸化LsCO,增强其转录活性和稳定性,从而激活LsFT介导的开花.
结论:
- 信号模块LsMAPK6-LsCO是对应高温的菜花过渡的一个关键调节器.
- LsMAPK6通过酸化LsCO,微调开花时间,起到积极调节者的作用.
- LsMAPK6代表了开发耐热菜品种的潜在育种目标,以适应全球变暖.
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