叶子液压迷宫:酸对捆束盖,杆和海绵状半球体导电性的作用
Adi Yaaran1, Eyal Erez1, Carl Procko2
1Institute of Plant Sciences and Genetics in Agriculture, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 76100, Israel.
Plant physiology
|June 30, 2023
概括
酸 (ABA) 调节植物中的水流. 对ABA不敏感的转基因植物在捆束和中粒细胞中表现出叶子液压导电率的增加,这表明这些细胞控制水运输.
科学领域:
- 植物生理学 植物生理学
- 工厂液压系统 工厂液压系统
- 水上运输 水上运输 水上运输
背景情况:
- 叶子的液压导电性 (Kleaf) 对于供水,二氧化碳吸收和保持植物水的状态至关重要.
- 酸 (ABA) 是一种关键的激素,调节植物对水的可用性作出反应.
- 捆束和美索菲尔细胞在ABA介导的水运输中的特定作用仍然不清楚.
研究的目的:
- 为了研究捆束和美索菲尔细胞在调节放射性水流的作用,从体对ABA的反应.
- 为了确定ABA如何影响不同类型的叶子细胞中的组织特异性水透性.
主要方法:
- 生成的转基因Arabidopsis thaliana在捆盖 (BSabi) 和美索菲尔 (MCabi) 细胞中具有ABA不敏感性.
- 利用特定于组织的光标记物来区分状中,海绵状中和捆束细胞.
- 在不同的ABA条件下测量了叶子的液压导电性,透气性,口腔参数和膜透性 (Pf).
主要成果:
- 与野生类型 (WT) 相比,BSabi和MCabi植物在最佳条件下表现出更高的Kleaf和透气.
- 麦卡比植物表现出增强的口腔孔径,口腔指数,血管直径和生物量.
- 在转基因和WT植物中,ABA减少了Kleaf和透气;组织特异性的Pf对ABA的反应是复杂的,有时是意想不到的.
结论:
- 捆束和美索菲尔细胞在调节叶子水力学方面发挥着重要作用,受ABA的影响.
- 状半囊-捆束膜通路动态地响应水的可用性,而状半囊则充当液压缓冲器.
- ABA对共塑性透性的调节对整体Kleaf的贡献极小,突出显示了无塑性和跨膜通路的重要性.
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