Author/Authors :
BESLIC, Zoran S. University of Belgrade - Faculty of Agriculture - Department of Viticulture, SERBIA , TODIC, Slavica R. University of Belgrade - Faculty of Agriculture - Department of Viticulture, SERBIA , TESEVIC, Vele V. University of Belgrade - Faculty of Chemistry, SERBIA , JADRANIN, Milka B. Institute of Chemistry, Technology and Metallurgy, SERBIA , NOVAKOVIC, Miroslav M. Institute of Chemistry, Technology and Metallurgy, SERBIA , TESIC, Dejan Charles Sturt University, AUSTRALIA
Abstract :
The effect of pruning severity on quercetin and catechin content in berry skins of cv. Blaufränkisch (Vitis vinifera L.) was studied over 3 years. Different crop levels and canopy structures were obtained by retaining 8, 16, and 24 nodes per vine at pruning. Canopy density, which is proportionate to the shoot number per canopy volume, directly affects the intensity of photosynthetically active radiation (PAR). The quercetin content has been shown to be highly dependent on the light exposure of the berries in which it accumulates. An increase in node number linearly decreased skin catechin, and it is suggested that the decrease was caused by increased yield per vine.
Keywords :
Bud load , canopy structure , berry skin , quercetin , catechin
