THE OSMOTIC CELL, SOLUTE DIFFUSIBILITY, AND THE PLANT WATER ECONOMY
THE OSMOTIC CELL, SOLUTE DIFFUSIBILITY, AND THE PLANT WATER ECONOMY
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DOI：
10.1104/pp.33.4.264
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发表时间：
1958-01-01
期刊：
影响因子：
7.4
通讯作者：
PHILIP, JR
中科院分区：
文献类型：
--
作者：
PHILIP, JR
值得注意的是，此处使用的关系对于质壁分离的细胞无效，并且分析仅限于正常非质壁分离条件下的细胞。前述处理可以应用于经典细胞渗透压计动力学中更普遍的问题。这种概括现在不涉及任何原理。 存在可扩散溶质的“渗透”：如果溶质是可扩散的，则术语“渗透”的适当性值得商榷。严格来说，该过程是透析过程之一。正如在理想的渗透压计中一样，在膜上设置扩散压 (14, 1) 差。在理想情况下，可以通过施加恒定的静水压差来防止溶剂跨膜的净移动。然而，在目前的情况下，“渗透”平衡需要所施加的压力差根据溶质扩散产生的浓度变化而变化。
It will be noted that the relationships used here fail for the plasmolyzed cell, and that the analysis is re-stricted to cells in the normal unplasmolyzed condition. The preceeding treatment may beapplied to more general problems in the dynamics of the classical cell osmometer. No now principles are involved in such generalizations." OSMOSIS" IN THE PRESENCE OF A DIFFUSIBLE SOL-uTE: The propriety of the term" osmosis" is open to question if the solute is diffusible. Strictly, the process is one of dialysis. Just as in the ideal osmometer, a diffusion pressure (14, 1) difference is set up across the membrane. In the ideal case, net movement of solvent across the membrane may be prevented by applying a constant hydrostatic pressure difference. In the present case, however," osmotic" equilibrium would require that the applied pressure difference vary in accord with changes in concentration produced by diffusionof the solute.