Effect of Berry Weight and its Components on the Contents of Sugars and Anthocyanins of Three Varieties of Vitis vinifera L. under Different Water Supply Conditions M. Ferrer1*, G. Echeverría2, A. Carbonneau3 (1) Facultad de Agronomia, Av. Garzon 780, Montevideo, Uruguay (2) Facultad de Agronomia, Av. Garzon 780, Montevideo, Uruguay (3) Sup-Agro 2, Place Viala, Montpellier, France (
[email protected]) Submitted for publication: September 2013 Accepted for publication: December 2013 Key words: Berry size, composition, components, water availability, varieties The influence of berry size on wine quality is a matter of debate. With the aim to contribute to that debate, a study of the influence of the varieties Tannat, Merlot and Cabernet Sauvignon on berry weight, on berry components (flesh, seeds and skin) and on the varieties’ oenological potential under different water supply conditions was carried out in Uruguay between 2001 and 2004. Replicated samples of 250 berries per vineyard were gathered at technological maturity at harvest. Berry weight and volume, weight ratio among each of the components and anthocyanin potential (ApH1 ) were measured and a basic analysis of the must was carried out. The vine water status was established through the measurement of pre-dawn leaf water potential. The tests showed that berry weight and sugar content were positively correlated and depended on variety, as was evident from the proportions of the berry components. Flesh weight was the most important determinant of berry weight, and flesh weight changed with the weight of the seeds. Larger values of these two components explained the heavier berries of the Tannat variety.