Postharvest stilbene-enrichment of red and white table grape varieties using UV-C irradiation pulses.

摘要: The red table grape varieties Flame, Red Globe, Crimson, and Napoleon, as well the white Superior, Dominga, Moscatel Italica, were irradiated with a previously optimized UV-C postharvest irradiation protocol (510 W, 40 cm, 60 s). induction kinetics of stilbenes trans-resveratrol, trans-piceid, trans-piceatannol, trans-astringin, viniferins was followed by using HPLC-DAD/MS/MS. most inducible viniferins. Both quantitative qualitative differences observed in both stilbene content seven grapes analyzed here. total resveratrol ranged from 0.69 mg/100 g fw (Dominga) to 2.3 (Red Globe). net 3.4-fold (Flame) 2315-fold highest variety Flame (0.73 fw), although Globe presented (175-fold). ...