RT Journal Article
SR Electronic
T1 Early Leaf Removal Has Larger Effect than Cluster Thinning on cv. Teran Grape Phenolic Composition
JF American Journal of Enology and Viticulture
JO Am J Enol Vitic.
FD American Society for Enology and Viticulture
SP ajev.2016.16071
DO 10.5344/ajev.2016.16071
A1 Marijan Bubola
A1 Paolo Sivilotti
A1 Danijela Janjanin
A1 Stefano Poni
YR 2017
UL http://www.ajevonline.org/content/early/2016/12/29/ajev.2016.16071.abstract
AB This study aimed to assess the effects exerted by early leaf removal (ELR) and cluster thinning (CT) on vegetative growth, yield components and berry composition of Teran (Vitis vinifera L.) grown in Istria region, Croatia. Both treatments were compared with an untreated control (C) during the 2012 and 2013 growing seasons. ELR implied removing six basal leaves at pre-flowering stage, while in CT 35% of clusters were removed at the onset of veraison. Both ELR and CT resulted in lower yield per vine compared to C (22% and 37% less, respectively) and greater Brix in berries at harvest (+1.3 and 1.0, respectively). The concentration of total phenolics in grapes increased 19% in ELR and 6% in CT in comparison to C, while total anthocyanin concentration increased only in ELR (+20% vs. C). Despite greater yield and lower leaf area/yield ratio in comparison to CT, ELR achieved higher total anthocyanin and phenolic concentration, suggesting that this practice is more suitable than CT for the production of high quality Teran grapes.