ISHS Acta Horticulturae 231: II International Symposium on Mango
ROLE OF ABSCISIC ACID IN THE RIPENING OF MANGO |
| Authors: | V.A. Palejwala, B. Amin, H.R. Parikh, V.V. Modi |
| Abstract:
Post-harvest treatment of mature, unripe mangoes with abscisic acid hastened the process of ripening. A 10-6 M concentration of this growth regulator decreased the levels of acids and elevated those of sugars. The sugar : acid ratio was also found to be maximum at this concentration of abscisic acid. The levels of hydrolytic enzymes, namely, amylase, and invertase and cellulase were higher in abscisic acid treated fruits as compared to the untreated controls. In an attempt to understand the mode of action of abscisic acid, the effect of protein and RNA syntheses inhibitors was examined. Cycloheximide (1 mg/ml) was found to interfere with the process of ripening and also with abscisic acid action, suggesting that protein synthesis was required for both, normal ripening as well as the abscisic acid effect. Cycloheximide treatment blocked the increase in the levels of hydrolytic and gluconeogenic enzymes observed in ripening mangoes and abscisic acid was unable to reverse the cycloheximide effect. Actinomycin-D (20 μg/ml) did not have any significant effect on the ripening process or the abscisic acid effect. | |
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