The effect of the different components of the inhibitor β complex in peelings of resting potato tubers on the respiration and uptake of inorganic phosphate

Abstract

The four different inhibitors or groups of inhibitors, called I, II, IV and V, which could be separated from the inhibitor β complex from peelings of resting potatoes (Solanum tuberosum L., variety Majestic) by thin layer chromatography in chloroform: 96% acetic acid (95:5 v/v), stimulated the oxygen uptake of discs of potato tubers during the first 4 to 5 h after addition of the substances. Number I was less active, the other three more active. Furthermore II, IV, and V significantly inhibited the uptake of inorganic phosphate by potato discs measured 24 and 5 h after addition of the substances, so that they seem to be uncouplers of oxidative phosphorylation.