Stilbene compounds and stilbene synthase expression during ripening, wilting, and UV treatment in grape cv. Corvina.
Journal of agricultural and food chemistry
confidence
Key findings
Stilbene/resveratrol content and STS expression monitored in grape berry skins during ripening, wilting, and UV; mixed wilting maximized resveratrol (34 ug/g).
View source on PubMed (PMID 11714355) ↗
- Sample size
- N/A
- Population
- Grape (Vitis vinifera L. cv. Corvina) berry skins
- Dosing
- N/A
- Duration
- Up to 58 days (wilting time-course)
- Route
- N/A
- Blinding
- not_reported
- Controls
- none
- Drug class
- polyphenol
Full abstract
The content of selected phenolic compounds including resveratrol (trans-3,5,4'-trihydroxystilbene) and its cis-isomer and glucosides (piceides) were monitored in grape (Vitis vinifera L. cv. Corvina) berry skin during ripening in the vineyard and in response to the post-harvest drying process (wilting). Four wilting conditions were compared (traditional, mixed, low-temperature, and high-temperature) to verify the eliciting effect of drying on resveratrol production. During fruit ripening the cis-piceid was the major stilbene found in berry skins, and a weak accumulation of stilbene synthase (STS) mRNA was observed, whereas UV-light irradiation greatly stimulated STS transcript of unripe berries. A time-course experiment showed the highest STS mRNA accumulation and resveratrol content (34 microg/g fresh weight at 58 days) occurring in berry skins in a mixed wilting process.