Abstract
In this study, we examined the effects of UV-C irradiation, light condition of the fruit bearing part, removal of the fruit bag and changing of the harvest period on the resveratrol content of table grape berry skins cultivated in Mie. The resveratrol content in ‘Kyoho’ was increased by UV-C irradiation and that in ‘Aki Queen’ showed a significant positive correlation with photon flux density of the fruit bearing part. The resveratrol contents were increased both by removal of the fruit bag in ‘Aki Queen’ and ‘Muscat Bailey A’ and by delaying the harvest time in ‘Kyoho’ and ‘Muscat Bailey A’. Our finding showed that the cultivation techniques to increase solar irradiation are effective to produce grape berries with a high level of resveratrol.
