Active H+ Efflux from Cells of Low-salt Barley Roots during Salt Accumulation
Open Access
- 1 June 1970
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 45 (6) , 787-790
- https://doi.org/10.1104/pp.45.6.787
Abstract
Measurements were made of net H+ loss from low-salt barley roots accumulating salt. Comparison of rates of loss from roots in different concentrations of KCl showed that H+ loss increased in the same way as the Mechanism II component of salt uptake. This H+ loss appeared to be coupled to salt uptake and was not due to increased respiration or metabolic breakdown of sugars. In view of the large negative potential of the cells (−60 millivolts), it is suggested that the H+ loss is due to an outward proton transport process.Keywords
This publication has 9 references indexed in Scilit:
- Simulation of Cl− Uptake by Low-salt Barley Roots as a Test of Models of Salt UptakePlant Physiology, 1969
- Localization of Hydrogen Ion and Chloride Ion Fluxes in Nitella The Journal of general physiology, 1969
- The Influence of H+ on the Membrane Potential and Ion Fluxes of Nitella The Journal of general physiology, 1968
- Loss of Organic Acids, Amino Acids, K, and Cl from Barley Roots Treated Anaerobically and with Metabolic InhibitorsPlant Physiology, 1967
- Sodium Absorption by Barley Roots: Role of the Dual Mechanisms of Alkali Cation TransportPlant Physiology, 1967
- Relationship of Cell Sap pH to Organic Acid Change During Ion UptakePlant Physiology, 1967
- The Influence of the Intracellular Potential on Potassium Uptake by Beetroot TissueThe Journal of general physiology, 1966
- Cation-Anion Balance during Potassium and Sodium Absorption by Barley RootsThe Journal of general physiology, 1963
- The Effect of pH and Temperature on the Absorption Of Potassium and Bromide by Barley Roots2Plant Physiology, 1957