黄金 perfusion 实验支持了 angiosperm xylem 中的插管坑膜的多层,半孔性质
Ya Zhang1, Luciano Pereira2, Lucian Kaack2
1Anhui Provincial Key Laboratory of the Conservation and Exploitation of Biological Resources, College of Life Sciences, Anhui Normal University, Beijingzhong Road 2, Wuhu, 241000, China.
The New phytologist
|February 26, 2024
概括
植物的树脂孔膜有多个毛孔收缩,而不是一个. 这种多层模型解释了流体运输阻力和粒子通过这些半孔结构的运动.
科学领域:
- 植物生物学 植物生物学
- 齐伦体生理学 齐伦体生理学
- 生物物理学的生物物理.
背景情况:
- 血管精子体中的液体运输对于植物的透气至关重要.
- 运输阻力主要取决于孔膜内的孔隙收缩的大小.
- 当前的模型通常假定单个孔隙收缩,这可能过度简化运输动态.
研究的目的:
- 为了测试一个多层孔膜模型的血管精子体.
- 为了研究孔隙收缩大小,孔腔膜厚度和流体运输之间的关系.
- 将模拟的孔狭窄数据与实验性金纳米颗粒 perfusion 的数据进行比较.
主要方法:
- 检查了来自八种芽种的树脂.
- 估计的孔径收缩大小频率与孔腔膜厚度相关.
- 使用传输电子显微镜透和分析纳米金颗粒.
- 将模拟的孔隙收缩数据与实验粒子 perfusion 数据进行了比较.
主要成果:
- 模拟的毛孔收缩大小频率与测量过颗粒大小呈现出质量一致.
- 实验频率比建模值低10-50倍.
- 较小的颗粒更容易穿透薄膜.
- 黄金颗粒的捕获增加了更多的收缩和更厚的膜.
- 现实的毛孔收缩范围在5-50nm之间,表明它具有中孔性质.
结论:
- 数据支持了具有多孔收缩的多层坑膜模型.
- 洞膜的中孔性质影响了流体运输和粒子捕获.
- 定量差异归因于实验限制,但定性协议验证了模型.
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