首次接触更大的重力:植物通过通过AP2/ERF转录因子调解的增强光合作用来适应
Yuko T Hanba1, Thi Huong Do2, Kaori Takemura3
1Faculty of Applied Biology, Kyoto Institute of Technology, Matsugasaki, Sakyo-ku, Kyoto 606-8585, Japan.
Science advances
|July 16, 2025
概括
增加的重力通过增加植物数量和叶绿体大小来增强的光合作用. 这种适应涉及APETALA2/乙烯反应因子 (AP2/ERF) 转录因子,对陆地植物进化至关重要.
科学领域:
- 植物生物学 植物生物学
- 进化生物学 进化生物学
- 引力生物学 引力生物学
背景情况:
- 陆地植物的出现需要适应重力和水的可用性.
- 植物在地球化过程中表现出生理和解剖学的变化.
- 重力,光合作用和陆地适应之间的遗传控制不清楚.
研究的目的:
- 研究增加重力的对光合作用和遗传调节的影响.
- 确定关键的基因和途径,参与植物适应陆地引力.
- 了解转录因子在对引力变化的反应中的作用.
主要方法:
- 在模拟的高重力 (6和10g) 下使用了模型.
- 测量了叶子二氧化碳扩散,光合作用速率,植物数量和叶绿体大小.
- 进行RNA测序以识别差异表达的基因,重点关注APETALA2/乙烯反应因子 (AP2/ERF) 转录因子.
- 对ISSUNBOSHI1 (IBSH1) 进行过度基因表达和抑制实验.
主要成果:
- 增加的重力 (10g) 增强了P的光合作用. 专利权. 专利权.
- 较高的重力导致植物数量增加和叶绿体大小增加.
- RNA测序揭示了几种AP2/ERF转录因子在10g时的上调调节.
- 过度表达IBSH1模仿了高重力反应,而其抑制形式则阻止了它们.
结论:
- 植物结构和叶绿体中的重力诱导的变化增强了的光合作用.
- AP2/ERF转录因子,特别是IBSH1,在调解对增加重力的反应方面发挥着重要作用.
- AP2/ERF转录因子和相关基因网络的扩散可能对陆地植物适应陆地的重力至关重要.
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