The Stoichiometry of Respiration-driven Potassium Transport in Corn Mitochondria
Open Access
- 1 February 1973
- journal article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 51 (2) , 357-362
- https://doi.org/10.1104/pp.51.2.357
Abstract
Determinations were made for corn (Zea mays L., WF9-Tms × M14) mitochondria of the stoichiometric relationship between K+ transport and bond energy produced in respiration (K+/∼ ratio). With inward pumping of potassium acetate activated by NADH oxidation, the initial rate of K+ transported into the sucrose inaccessible space varied between 0.58 and 0.97 K+/∼, assuming 2 high energy bond equivalents per NADH oxidized. Only small amounts of H+ were ejected. Valinomycin did not alter the ratio.Keywords
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