Effect of abscisic acid on ripening of mangoes (Mangifera indica).
Parikh H. R., Palejwala V. A., Modi V. V.
Author Affiliation: MS University of Baroda, Baroda 390 002, India.
Indian Journal of Experimental Biology 24 : 722-725
Abstract : Mature unripe fruits of the cv. Alphonso were treated or not with 10-6M ABA by the vacuum infiltration method and held at around 30°C for 8 days. Both treated and control fruits showed a climacteric peak on the second day and another on the sixth day, the rate of respiration being higher in treated fruits. Levels of pectin lyase activity (associated with fruit softening) were higher in treated fruits, as were sucrose synthetase, sucrose phosphate synthetase, cytosolic malic dehydrogenase and malic enzyme activities. The peak in cytosolic malic dehydrogenase was higher during the early phase of ripening, while that in malic enzyme was higher during the later phase; both peaks were greater in treated than in control fruits.