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Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/18015
Title: Differential stilbene induction susceptibility of seven red wine grape varieties upon post-harvest UV-C irradiation
Authors: Cantos Villar, Emma; Tomás Barberán, Francisco; Martínez, Adrián; Espín de Gea, Juan Carlos
Keywords: HPLC-MS-MS
UV-C irradiation
Vitis vinifera
Wine grapes
Issue Date: 19-Feb-2004
Publisher: Springer
Citation: European Food Research and Technology 217(3): 253-258 (2003)
Abstract: The stilbene induction capacity of the red wine grape varieties 'Tempranillo' (TEM), 'Cabernet Sauvignon' (CAS), 'Merlot' (MER), 'Syrah' (SYR), 'Monastrell' (MON), 'Garnacha' (GAR) and 'Cariñena' (CAR) exposed to post-harvest UV-C irradiation is reported for the first time. The induction of trans-piceatannol, trans-resveratrol and viniferins, among other stilbenes, was characterized using high-performance liquid chromatograph with diode-array and mass spectrometric detection (HPLC-DAD-MS-MS). All the wine grape varieties increased their resveratrol, piceatannol and viniferin content after UV-C treatment with the exception of the variety MON in which only piceatannol was induced. Other stilbenes such as astringin (piceatannol glucoside) or piceid (resveratrol glucoside) were induced to a lesser extent and only in some varieties. The stilbene induction capacity of grapes submitted to UV-C irradiation did not necessarily match the final corresponding maximum stilbene content reached in each variety. The total stilbene induction capacity of the grapes ranged from 2.4-fold (in MER) to 10.9-fold (in both CAS and CAR) with respect to untreated grapes (control). The total stilbene content (mg stilbene/100 g fresh weight, fw) after UV-C irradiation ranged from 1.16 in MON to 3.5 in MER. In general, the maximum induction of specific stilbenes in all the varieties followed the sequence: resveratrol >piceatannol >1-viniferin >piceid. This maximum induction was 22.7-fold for resveratrol in CAS, 6.4-fold for piceatannol in CAR, 3.8-fold for piceid in TEM and 8.4-fold for 1-viniferin in both CAS and CAR with respect to the control. The maximum concentration of the specific stilbenes reached after UV-C irradiation was 2.5 (mg stilbene/100 g fresh grape weight) for resveratrol in MER, 0.42 for piceatannol in MER, 0.16 for piceid in MON and 0.39 for 1-viniferin in CAR. The screening of stilbene induction capacity in red wine grapes treated with UV-C irradiation could be useful for selecting the most suitable variety to produce stilbene-enriched red wines with potentially increased health-promoting properties.
Description: 6 pages, 2 figures, 2 tables.-- Online version published Aug 2003.
Publisher version (URL): http://dx.doi.org/10.1007/s00217-003-0736-x
URI: http://hdl.handle.net/10261/18015
DOI: 10.1007/s00217-003-0736-x
ISSN: 1438-2377 (Print)
1438-2385 (Online)
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