ISHS Acta Horticulturae 464: International Postharvest Science Conference Postharvest 96
RELATION BETWEEN ABA APPLICATION AND FRUIT QUALITY OF ‘PIONNIER’ GRAPE (VITIS SP.) |
| Authors: | S. Kondo, E. Masuda, K. Inoue |
| Abstract:
A 500 ppm (+)-s-ABA solution was applied, as a dip, only to the fruit, 57 days after full bloom (DAFB) (before colouring) and 67 DAFB (beginning of colouring). Endogenous ABA content in the peel increased gradually from 26 to 54 DAFB, and then decreased slightly until harvest (90 DAFB) and also during 42 days storage at 1°C. At the same time, t-ABA content in the peel increased gradually from 26 to 61 DAFB, and then decreased slightly until harvest after which its level increased dramatically after 42 days storage at 1°C. The ABA contents (free and conjugated) in peel of the 57 and 67 DAFB applications were higher than those of the untreated control. Both ABA applications increased the phenylalanine ammonia-lyase (PAL) activity and anthocyanin concentration of the peel. ABA application at 67 DAFB increased the glucose and fructose contents of berries at early harvest (76 DAFB) compared to those of the untreated control, while contents at the late harvest date (90 DAFB) were almost equivalent. These results suggest that ABA application at the beginning of coloring advances the maturation of ‘Pionnier’ grape berries. | |
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