Stilbene compounds and stilbene synthase expression during ripening, wilting, and UV treatment in grape cv. Corvina.
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.
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Corso di Laurea in Scienze e Tecnologie Alimentari, Università di Bologna, via Ravennate 1020, Cesena (FC) 47023 Italy.
Parpinello
G P
GP
Tornielli
G B
GB
Ferrarini
R
R
Giulivo
C
C
D000217:Acyltransferases / Q000235:genetics / Q000378:metabolism*; D015152:Blotting, Northern; D012333:RNA, Messenger / Q000235:genetics; D000077185:Resveratrol; D013267:Stilbenes / Q000378:metabolism*; D014158:Transcription, Genetic; D014466:Ultraviolet Rays; D027843:Vitis / Q000502:physiology / Q000528:radiation effects*
D012333:RNA, Messenger; D013267:Stilbenes; D000217:Acyltransferases; C022674:stilbene synthase; D000077185:Resveratrol