ABSTRACT Grape juices have been valued due to their potential health benefits, which have demanded increased grape productivity and quality. Five grape cultivars grown in Brazil, Isabel Precoce, Carmem, Violeta, Concord and Bordo were evaluated in 2013 and 2014 seasons for bioactive components and also for juice processing quality traits. Production cycle was the longest for Carmem but lower and similar for Violeta, Isabel, Bordo and Concord. Isabel showed higher productivity (5.4 kg∙plant-1) but lowest soluble solids content (16.9 °Brix), anthocyanins (26.7 mg∙100 g-1) and total phenolics (110.7 mg∙100 g-1). The highest anthocyanins contents were observed in Violeta (189.9 mg∙100 g-1) and Bordo (133.8 mg∙100 g-1). These cultivars were also rich in phenolics (356.1 and 239.5 mg∙100 g-1, respectively). The highest anthocyanin and total phenolics concentrations were found in Violeta juice (2.68 and 6.33 g∙L-1) followed by Bordo (1.44 and 2.86 g∙L-1). Isabel juice had the lowest content, 0.14 and 1.29 g∙L-1, respectively. Biogenic amines were found at low concentrations only in the juices. Putrescine and spermidine were the major amines detected in juices. Phenylethylamine was detected only in Bordo juice from 2013 season and tryptamine was detected only in 2014 season. Blends were preferred over varietal juices except for Carmem.

ABSTRACT O comportamento agronômico da videira Chardonnay, indicada para a produção de vinhos espumantes, está relacionado ao manejo do vinhedo e às condições edafoclimáticas da região de cultivo. O objetivo deste trabalho foi avaliar dois tipos de poda (Cordão Royat e Guyot Duplo) no desenvolvimento vegetativo e produtivo da videira Chardonnay, em região de elevada altitude no Sudeste Brasileiro. Foi utilizado o clone 96 da cultivar Chardonnay, enxertado sobre o porta-enxerto 1103 Paulsen, e sustentado em espaldeira, em um vinhedo comercial localizado a 1.280 m de altitude em Divinolândia (SP). Durante os ciclos de produção de 2014 e 2015, foram avaliados vigor vegetativo, fertilidade de gemas, produção e composição físico-química das bagas. A poda do tipo Royat induziu maior vigor vegetativo e aumentou a fertilidade das gemas, o número de cachos e a produtividade da videira Chardonnay quando comparada à poda Guyot. Apesar do aumento de produtividade, não houve efeito do tipo de poda na qualidade final da uva. Portanto, a escolha do sistema de poda em função das características genéticas da cultivar e sua interação com o ambiente pode proporcionar maior rentabilidade ao vinhedo. Para o cultivo da Chardonnay no Sudeste Brasileiro, com a finalidade de se obterem vinhos espumantes, o sistema Royat é o mais indicado.

ABSTRACT The agronomical responses of Chardonnay, a variety indicated for sparkling wine production, is influenced by the vineyard management and the edaphoclimatic conditions of the region. The objective of this study was to evaluate the effects of two pruning types (Royat and double Guyot) on vegetative and reproductive development of Chardonnay vine growing at high altitude in the Brazilian southeastern region. The experiment was carried out in a commercial vineyard located at 1,280 m of altitude in Divinolândia, São Paulo State, Brazil. The Chardonnay vines (clone 96), grafted onto 1103 Paulsen rootstock and trained in a vertical shoot positioning trellis system, were assessed. Vegetative vigor, bud fruitfulness, production and physicochemical composition of grapes were evaluated during 2014 and 2015 growing seasons. The Royat pruning induced higher vegetative vigor and increased the bud fruitfulness, the cluster number and the productivity of Chardonnay vine when compared to Guyot pruning. Even though the increase on yield was observed, there was no effect of pruning type on grape final quality. Therefore, the choice of pruning method in function of variety genetic characteristics and their interaction with environment can optimize the vineyard profitability. In the Brazilian southeast, the Royat system is the most suitable one to grow Chardonnay for sparkling wines production.