Zonia Laura, Munnik Teun
Department of Plant Physiology, Swammerdam Institute for Life Sciences, University of Amsterdam, Kruislaan 318, 1098 SM Amsterdam, Netherlands.
Trends Plant Sci. 2007 Mar;12(3):90-7. doi: 10.1016/j.tplants.2007.01.006. Epub 2007 Feb 12.
H(2)O is one of the most essential molecules for cellular life. Cell volume, osmolality and hydrostatic pressure are tightly controlled by multiple signaling cascades and they drive crucial cellular functions ranging from exocytosis and growth to apoptosis. Ion fluxes and cell shape restructuring induce asymmetries in osmotic potential across the plasma membrane and lead to localized hydrodynamic flow. Cells have evolved fascinating strategies to harness the potential of hydrodynamic flow to perform crucial functions. Plants exploit hydrodynamics to drive processes including gas exchange, leaf positioning, nutrient acquisition and growth. This paradigm is extended by recent work that reveals an important role for hydrodynamics in pollen tube growth.
水（H₂O）是细胞生命中最基本的分子之一。细胞体积、渗透压和流体静压受到多种信号级联反应的严格控制，它们驱动着从胞吐作用、生长到细胞凋亡等关键的细胞功能。离子通量和细胞形状重塑会导致质膜两侧渗透势的不对称，并引发局部流体动力流动。细胞已经进化出了引人入胜的策略来利用流体动力流动的潜力来执行关键功能。植物利用流体动力学来驱动包括气体交换、叶片定位、养分获取和生长等过程。最近的研究扩展了这一范式，揭示了流体动力学在花粉管生长中的重要作用。
