PHENOLIC COMPOSITION OF VRANEC GRAPEVINE CULTIVAR (Vitis vinifera L.) GRAFTED ON DIFFERENT ROOTSTOCK

Mr. Dushko Nedelkovski, Hristina Poposka, Julijana Cvetković, Klime Beleski

Abstract: The objective of this work comprises the content of phenolic compounds in grape and wine produced by Vranec grapevine cultivar grafted on four different rootstocks (Teleki, Fercal, Rupestris Du Lot and Chasselas 41B). Total phenols, total flavan-3-ols, total anthocyanins and total fl avonoids in the grapeberries, separately in seeds, pulp and skin were determined. Three months later, the same parameters were analyzed in the wine obtained by the investigated grape variety. The field investigations showed that Teleki and Fercal were more vigorous rootstocks than Rupestris Du Lot and Chasselas 41B, but there was not significant deference in the phenological stages between the rootstocks. The grape clusters of Vranec grafted on Fercal and Teleki were larger than Rupestris Du Lot and Chasselas 41B. The results obtained from the laboratory analysis showed higher level of total phenols in the berries of Vranec grafted on Teleki rootstock, higher level of total anthocyanins in the berries of Vranec grafted on Chasselas 41B rootstock, higher level of total fl avonoids in the berries of Vranec grafted on Rupestris Du Lot rootstock and the higher level of total fl avan-3-ols in the berries of Vranec grafted on Fercal rootstock. Statistical analyses were performed using SPSS software 14.0. The differences were evaluated by ANOVA analysis through General Linear Model (GLM) procedure. After GLM analyses post hoc comparison of means were calculated by LSD (Least Significant Difference). Results were expressed at the P = 0.05 level of significance.

Keywords: Chasselas 41B; rootstock; total phenols; Vranec grapevine

Date published: 2017-07-07