通过PINs和plasmodesmata进行平行auxin运输,在Arabidopsis叶的低反应过程中
Jiazhou Li1,2,3, Jintao Yang1,2,3, Yibo Gao1
1College of Life Sciences, Northwest A & F University, Yangling, 712100, China.
Plant cell reports
|December 20, 2023
概括
叶子低静止,植物避免阴影的反应,依赖于两个并行的辅酶运输途径:PIN蛋白介导和等离子体介导. 这两种途径对于完全的低性反应至关重要,为改善作物提供了洞察力.
科学领域:
- 植物生物学 植物生物学
- 分子植物生理学分子植物生理学
- 植物开发 植物开发
背景情况:
- 植物避免阴影的反应对于生存和竞争至关重要.
- 辅助运输是植物生长和发育的关键调节者,包括叶子运动.
- 叶子低沉,叶子向上卷曲,是对感知到阴影的反应.
研究的目的:
- 为了研究PIN蛋白介导和等离子体介导的auxin运输通路在叶子hyponasty之间的相互作用.
- 为了确定这两个辅酶运输途径是否并行或顺序运行.
- 阐明这些途径在调解避阴反应中的功能关系.
主要方法:
- 创建和分析具有被破坏的辅酶运输通路 (PIN介导和等离子体介导) 的植物突变物.
- 使用光标记物 (PIN3-GFP,PIN7-GFP) 进行PIN蛋白定位的可视化.
- 通过等离子体测量细胞合,并分析突变系中的基因表达 (mRNA水平).
主要成果:
- 通过PIN介导的和通过等离子体介导的传输通路对于完全的叶子低静止反应至关重要.
- 通过PIN介导的运输与通过plasmodesmata介导的运输平行地沿着轴中间肋表皮细胞发生.
- 这两条路径并非多余;一条路径的中断不能完全补偿另一条路径.
结论:
- 叶子低静止是通过通过两个不同的平行途径通过辅酶运输来调节的.
- 了解这些机制可以为操纵作物中避阴反应的策略提供信息.
- 这项研究提供了关于植物适应环境线索的机制性见解,例如遮阳.
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