Physico-chemical composition of wine grapes berries in summer and winter growing seasons/Composicao fisico-quimica de uvas para vinho fino em ciclos de verao e inverno

• Published in: Revista Brasileira de fruticultura Vol. 32; no. 4; p. 1127
• Main Authors: Da Mota, Renata Vieira, Silva, Camila Pinheiro Carvalho, Favero, Ana Carolina, Purgatto, Eduardo, Shiga, Tania Misuzu, Regina, Murillo De Albuquerque
• Format: Journal Article
• Language: Spanish
• Published: Sociedade Brasileira de Fruticultura 01-12-2010
• ISSN: 0100-2945

This work aimed to evaluate some ripening parameters of cultivars Pinot Noir, Tempranillo, Merlot, Cabernet Sauvignon, Syrah, Chardonnay and Sauvignon Blanc submitted to the double-pruning management in Cordislandia, in the coffee region of the south of the state of Minas Gerais. Grapevines were cultivated in two different growing seasons, spring-summer from August to January and autumn-winter from January to July. Quality parameters such as berry transversal and longitudinal diameters, acidity, tartaric and malic acids, pH, soluble solids, anthocyanins, phenolic compounds, glucose, fructose and sucrose were evaluated. All cultivars showed higher pH, soluble solids, sugars, anthocyanins and phenolic compounds levels and lower transversal and longitudinal diameters in winter cycle. Syrah cultivar was stood out with higher anthocyanin and phenolic compounds levels in summer and winter cycles however showed lower reducing sugars levels. The alteration of the production cycle through double- pruning management in order to harvest grapes in the winter in the coffee region of Minas Gerais favors the ripening of the fruits and improves the quality of wine grapes. Index terms: Vitis vinifera, ripening, production cycle, phenolic compounds, organic acids, sugars. Este trabalho teve como objetivo avaliar o potencial de maturacao das cultivares Pinot Noir, Tempranillo, Merlot, Cabernet Sauvignon, Syrah, Chardonnay e Sauvignon Blanc submetidas ao regime de dupla poda, em Cordislandia, regiao cafeeira do sul de Minas Gerais. As plantas foram submetidas a dois ciclos de producao, um de primavera-verao, compreendido entre agosto e janeiro, e outro ciclo de outonoinverno, entre janeiro e julho. Como parametros de qualidade, foram avaliados os diametros transversal e longitudinal da baga, acidez, acidos tartarico e malico, pH, solidos soluveis, antocianinas, fenolicos totais e os teores de glicose, frutose e sacarose. Todas as variedades apresentaram maiores teores de pH, solidos soluveis, acucares, antocianinas e fenolicos totais, e reducao nos diametros transversal e longitudinal na safra de inverno. A cultivar Syrah destacou-se das demais no conteudo de antocianinas e fenolicos totais, tanto no verao quanto no inverno, entretanto apresentou o menor conteudo de acucares. A alteracao do ciclo de producao da videira atraves da tecnica da dupla poda para colheita, no periodo de inverno, na regiao cafeeira de Minas Gerais, favorece a maturacao dos frutos e melhora consideravelmente a qualidade das uvas para vinificacao. Termos para indexacao: Vitis vinifera, maturacao, safra, compostos fenolicos, acidos organicos, acucares.