在Pinus tabuliformis休眠期间,短时间诱导的PtTFL2表达触发了生长防御权衡
Chengcheng Zhou1, Hongmei Liu1,2, Yue Sang1
1State Key Laboratory of Tree Genetics and Breeding, National Engineering Research Center of Tree Breeding and Ecological Restoration, College of Biological Sciences and Technology, Beijing Forestry University, Qinghua East Road 35, Beijing 100083, China.
Plant physiology
|August 19, 2025
概括
短短的一天很快就会导致针叶树的休眠状态. 基因PtTFL2起着关键作用,通过与其他因素的相互作用来调节生长停止和冷耐受性,突出显示了它在冬季适应中的重要性.
科学领域:
- 植物生物学 植物生物学
- 休眠状态的分子机制
- 针叶植物生理学 针叶植物生理学
背景情况:
- 针叶树表现出复杂的休眠策略,以冬季生存.
- 缩短的光周期是诱导针叶树休眠的主要提示,导致生长停止和增加结耐受性.
- 控制短日诱导休眠的精确分子途径在很大程度上仍未被阐明.
研究的目的:
- 为了研究在针叶树中短日诱导休眠的基础上的分子机制.
- 为了确定关键的基因和调节网络,涉及针叶树冬季适应.
- 阐明TFL1类基因在休眠诱导和冷性中的功能.
主要方法:
- 用不同的光周期对Pinus tabuliformis苗木进行处理.
- 转录组分析以确定与休眠相关的基因表达模式.
- 在树和Arabidopsis thaliana中PtTFL2的异质过度表达.
- 同表达网络分析和蛋白质与蛋白质相互作用研究.
主要成果:
- 经证实,短日可以迅速诱导和促进Pinus tabuliformis的休眠状态.
- 类似TFL1 (PtTFL2) 的表达与休眠相关的生物过程有很强的相关性.
- 在异质系统中,PtTFL2过度表达促进了休眠状态,增长延迟,并增强了结耐受性.
- 确定了一个以PtTFL2为中心的调节网络,涉及PtNF-YC18和PtNAC67.7.
- PtTFL2 与 PtNF-YC18 相互作用以调节生长停止,与 PtNAC67 相互作用以激活 PtDHN2,从而提高结耐受性.
结论:
- PtTFL2是针叶树中短日诱导休眠的关键调节者.
- PtTFL2-PtNF-YC18模块控制植物生长和停止生长.
- 在PtTFL2-PtNAC67模块通过激活PtDHN2.2,提高结耐受性.
- 这些发现揭示了针叶树在冬季休眠期间生长防御权衡的分子框架.
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