The influence of calcium on potassium fluxes across the root of Ricinus communis |
| |
| Authors: | F. R. Minchin D. A. Baker |
| |
| Affiliation: | (1) School of Biology, City of Leicester Polytechnic, Leicester, UK;(2) School of Biological Sciences, University of Sussex, BN1 9QG Falmer Brighton, Sussex, UK;(3) Present address: Department of Botany, The Queen's University of Belfast, BT7 1NN Belfast, Northern Ireland |
| |
| Abstract: | Summary 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. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
