Measurement of profiles of potassium activity and electrical potential in the intact root
- 1 January 1972
- journal article
- Published by Springer Nature in Planta
- Vol. 108 (2), 147-151
- https://doi.org/10.1007/bf00386076
Abstract
Profiles of potassium activity and electrical potential in the vacuoles of cells across the intact root of Helianthus annuus have been measured. No gradient in either potassium activity or potential difference was detected from epidermis to pericycle. The trans-root electrical potential was found to be made up of two components, a large P.D. between the outside solution and the outer cells and a small P.D. at the pericycle-xylem interface. The results indicated that all the living cells of the root have the same capacity to actively accumulate potassium.Keywords
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