School of Biology, City of Leicester Polytechnic, Leicester, UK.
Planta. 1973 Jun;113(2):97-104. doi: 10.1007/BF00388195.
The effect of calcium on the flux of potassium to the exudate of detached root systems of Ricinus communis has been investigated. Previous analyses have indicated the presence of a water dependent and a water independent flux of potassium which vary with the concentration of potassium in the bathing medium, in the presence of 0.1 mM CaCl2. In the present study it has been observed that at a higher concentration of calcium in the bathing medium (2.5 mM CaCl2) the water dependent flux of potassium is greatly reduced while the water independent flux is not affected. It is proposed that the differential effect of calcium on these two fluxes is a reflection of the degree of dependence of these fluxes on the permeability of the plasmamembranes within the root.
已经研究了钙对蓖麻离体根系渗出液中钾流的影响。先前的分析表明存在一种依赖水的钾流和一种不依赖水的钾流，它们随浴液中钾浓度的变化而变化，在存在 0.1mM CaCl2 的情况下。在本研究中观察到，在浴液中较高浓度的钙（2.5mM CaCl2）下，依赖水的钾流大大减少，而不依赖水的钾流不受影响。据推测，钙对这两种流动的不同影响反映了这些流动对根内质膜通透性的依赖程度。
