Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7598430 | Food Chemistry | 2014 | 30 Pages |
Abstract
Increasing evidence for the health benefits of E-resveratrol has triggered interest in stilbenoids in grapes, wine and by-products. Less attention has been paid to stilbenoid levels in viticulture residues. However, grape canes are a promising source of stilbenoids and have economic potential because they are a source of high-value phytochemicals. The objective of this research was to determine the effect of post-pruning storage on stilbenoid levels in grape canes. In most samples, the predominant stilbenoid was (E)-resveratrol, followed by (E)-ε-viniferin. In Pinot Noir canes stored after pruning at room temperature, the stilbenoid levels increased significantly after 8 months. The concentration was increased by up to fivefold, reaching 4777 mg kgâ1 dw (dry weight). This effect did not occur in frozen, lyophilised or milled material. Branches collected directly from the plants after grape vintage and those remaining on the plant after pruning showed only a small increase in stilbenoid levels.
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Tamara Gorena, Vania Saez, Claudia Mardones, Carola Vergara, Peter Winterhalter, Dietrich von Baer,