Abstract

FRANCO-BANUELOS, Ambrosio; CONTRERAS-MARTINEZ, Cristina S.; CARRANZA-TELLEZ, José  and  CARRANZA-CONCHA, José. TOTAL PHENOLIC CONTENT AND ANTIOXIDANT CAPACITY OF NON-NATIVE WINE GRAPES GROWN IN ZACATECAS, MEXICO. Agrociencia [online]. 2017, vol.51, n.6, pp.661-671. ISSN 2521-9766.

The production of non-native wine grapes (Vitis vinifera L.) in Zacatecas, Mexico has increased in recent years; however, information about their chemical composition is not yet available. Polyphenols are associated with the antioxidant capacity of grapes due to their beneficial health effects. Therefore, the aim of this study was to evaluate the total phenolic content (TPC) and the antioxidant capacity (AC) of non-native wine grapes grown in Zacatecas, México. The AC and TPC of 4 white grape varieties and 4 red grape varieties were analyzed. Experimental design was completely randomized with three replications and the data was analyzed using ANOVA and compared with Tukey test (p≤0.05). Pearson’s correlation and linear regression were calculated for the TPC and the AC. Total phenolic content was significantly higher in red varieties of Rubired and white varieties of Furmint. The AC (using the ABTS method) was significantly correlated with the TPC (R2=0.8304). Red grape varieties, Petite Syrah and Rubired had a significant (p≤0.05) higher antioxidant potential which is associated with their higher content of bioactive compounds. The values obtained in this study show that wine grapes with a high functional content can be harvested in the state of Zacatecas, non-native varieties resulted in higher capacities than the values reported in the country of origin for each respective variety.

Keywords : wine grape cultivars; phytochemicals; antioxidant activity.