Effects of Gamma Radiation and Ethylene Treatment on the Activity of Succinate Oxidation of Mitochondrial Fraction in Tomatoes

Abstract

The respiratory control ratio (RC ratio) of mitochondrial fraction isolated from the 250 Kradfruits immediately after irradiation was lower than that from the unirradiated ones, but the RC ratio in 250 Krad sample became higher during ripening in contrast to the decrease of RC ratio in unirradiated ones. The mitochondrial fraction isolated from ethylene treated (500 ppm for 18 hours) fruits, both the unirradiated and 500 Krad-fruits temporarily showed the rapid oxidation of succinate with addition of ADP and the RC ratio was 1.0.