Action of Calcium on Corn Mitochondria
Open Access
- 1 November 1965
- journal article
- research article
- Published by Oxford University Press (OUP) in Plant Physiology
- Vol. 40 (6), 1033-1040
- https://doi.org/10.1104/pp.40.6.1033
Abstract
No evidence for uncoupling of phosphorylation could be found unless concentrations of Ca were used which strongly suppressed respiration. Lower concentrations of Ca did lower P/O ratios, but this was due to diversion of phosphate from ATP formation into uptake. Ca did not stimulate ATPase or swelling rates. Contraction with ATP or succinate was enhanced by Ca, particularly in the presence of phosphate. Only small stimulations of acceptorless respiration were found; these were not sustained except in the presence of phosphate and ATP. In no respect did Ca act like 2,4-dinitrophenol. The action of Ca in diverting phosphate into uptake is discussed.This publication has 14 references indexed in Scilit:
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