Correlations between Potassium Uptake and Hydrogen Efflux in Barley Varieties
Open Access
- 1 August 1981
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 68 (2) , 457-459
- https://doi.org/10.1104/pp.68.2.457
Abstract
Rates of hydrogen ion secretion and potassium (86Rb) absorption by intact roots of twenty-four barley varieties were measured in solutions containing K2SO4 (1 × 10−4 to 1 × 10−3 molar) plus 5 × 10−4 molar CaSO4, at initial pH values in the range 5.3 to 5.5. Fluxes of H+ and K+ were strongly correlated in short-term experiments (up to 15 minutes) as well as in long-term experiments (lasting 24 hours). The observed correlations provide the basis for a preliminary screening method, designed to segregate varieties with high rates of potassium uptake by the use of an acid-base indicator (methyl red).This publication has 4 references indexed in Scilit:
- Varietal Differences in Potassium Uptake by BarleyPlant Physiology, 1980
- Regulation of Potassium Absorption in Barley RootsPlant Physiology, 1976
- Active H+ Efflux from Cells of Low-salt Barley Roots during Salt AccumulationPlant Physiology, 1970
- Hydrogen-ion Effects and the Accumulation of Salt by Barley Roots as Influenced by MetabolismAmerican Journal of Botany, 1940