Abstract
UV-C treatment has been studied for increasing stilbene in grape and inhibiting the development of spoilage microorganism. In this work, treatment application day (7, 5, 3 and 1 days previous to harvest) and light dose (from 966 to 27,990 J/m2) have been optimised together with storage conditions (20 °C–80% RH, 4 °C–60% RH and combined) when grapes were treated on plant with UV-C light. trans-Resveratrol and ε-viniferin were monitored in grapes after treatments. Maximum trans-resveratrol concentration was achieved after 24 h regardless of preharvest application day. It increased between 46 to and 22-folds. A dose lower than 10,000 J/m2 approximately seemed to increase trans-resveratrol. trans-Resveratrol was affected not only by the dose but also by how the dose was applied in terms of output power and exposure time. Cold storage keeps stilbene metabolism still until grapes reach a temperature which re-activates their synthesis. Preharvest UV-C light treatment is an interesting stilbene inductor in table grapes on plant and during postharvest storage. Due to the health promoting and anti-pathogen properties of stilbenes, the use of this technology is interesting for both the consumer preferences and organic/viticulture point of view.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Innovative Food Science & Emerging Technologies
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
