Sodium Does Not Compete with Calcium in Saturating Plasma Membrane Sites Regulating 22Na Influx in Salinized Maize Roots
Open Access
- 1 May 1991
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 96 (1), 331-334
- https://doi.org/10.1104/pp.96.1.331
Abstract
Half maximal inhibition of sodium (22Na+) influx into maize (Zea mays L.) root segments incubated in solutions containing from 0.25 to 100 millimolar NaCl was consistently attained with external calcium activity at 0.26 ± 0.10 millimolar. Sodium ions do not appear to compete with calcium during initial binding to sites on the plasma membrane that participate in the regulation of sodium influx under saline conditions.Keywords
This publication has 8 references indexed in Scilit:
- Does Salinity Reduce Growth in Maize Root Epidermal Cells by Inhibiting Their Capacity for Cell Wall Acidification?Plant Physiology, 1990
- Salinity Affects Intracellular Calcium in Corn Root ProtoplastsPlant Physiology, 1988
- Salinity Reduces Membrane-Associated Calcium in Corn Root ProtoplastsPlant Physiology, 1987
- Calcium messenger system in plantsCritical Reviews in Plant Sciences, 1987
- Effects of NaCl and CaCl2 on Ion Activities in Complex Nutrient Solutions and Root Growth of CottonPlant Physiology, 1986
- Controls on 22Na+ Influx in Corn RootsPlant Physiology, 1985
- Salt Toleration by Plants: Enhancement with CalciumScience, 1969
- Sodium Absorption by Barley Roots: Its Mediation by Mechanism 2 of Alkali Cation TransportPlant Physiology, 1967