Biochemical changes during acetylene-induced ripening in mangoes (var. Alphonso).
Padmini S., Prabha T. N.
Author Affiliation: Division of Fruits, Vegetable and Plantation Crops Technology, Central Food Technological Research Institute, Mysore 570?013, India.
Tropical Agriculture 74 : 265-271
Abstract : Acetylene [ethylene] (released from calcium carbide) induced an early climacteric along with an increased rate of respiration in Alphonso mangoes. However, flavour was found to be impaired and there was lower synthesis of aromatic components, sugars and lipids. The metabolism of labelled organic acids and incorporation of labelled linoleic acid into the volatile fraction were suppressed in treated fruits. The degree of unsaturation of free fatty acids increased during ripening and was higher in the control than in treated fruits at their ripe stage. Peel colour with higher carotenoid content was superior in treated compared to untreated fruits. Xanthophylls were higher in concentration in control fruits, whereas, xanthophyll esters and ?-carotenoids were predominant in treated fruits. In treated fruits, the loss of membrane integrity, starch and pectin were accelerated and there was more rapid dissolution of starch granules as seen under the scanning electron microscope.