Ethylene biosynthesis and respiration during ripening in mango cultivars.
Reddy Y. V., Srivastava G. C.
Author Affiliation: Division of Plant Physiology, Indian Agricultural Research Institute, New Delhi - 110 012, India.
Indian Journal of Plant Physiology 6 : 361-364
Abstract : The activities of ACC oxidase [1-aminocyclopropane-1-carboxylate oxidoreductase] and ACC synthase [1-aminocyclopropane-1-carboxylate synthase] were determined at different stages of fruit ripening of mango cultivars Amrapali and Dashehari. An increase in ACC synthase activity was observed in both cultivars from the mature green stage to overripe stage. ACC oxidase decreased with ripening, resulting in ACC accumulation. ACC synthase activity decreased in the presence of aminooxyacetic acid at 50 µM. Dashehari showed higher ACC synthase activity and ACC accumulation than Amrapali. Higher respiration rate and ethylene production was observed in Amrapali compared to Dashehari.