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绿色植物吸收水分的主要器官是根。根吸收水分最活跃的部位是根毛区细胞。那么细胞是怎样吸水呢?这是一个复杂的过程,近来关于水分进入细胞的研究有了新的发展。这一新的发展是建立在热力学概念基础上的,也就是水分流动需要能量。水流方向都是从“水势”高处向着“水势”低处流动,所以首先要讨论自由能和水势的概念。
The main organ that absorbs water from green plants is the root. Roots absorb the most active parts of the water is the root hair cells. How does the cell absorb water? This is a complicated process. Recent research on the entry of water into cells has made new developments. This new development is based on the concept of thermodynamics, that is, moisture flow requires energy. The direction of the water flow is from the height of the “water potential” to the “water potential”, so we must first discuss the concept of free energy and water potential.