Avaliação do potencial de cinco cultivares de videiras americanas para sucos de uva no sul de Minas Gerais

Abstract

RESUMOObjetivou-se, no presente trabalho realizar uma caracterização dos sucos de uva de cinco cultivares de videira americana Vitis labrusca (Folha de Figo, Alwood, Concord, BRS-Rúbea e Isabel) segundo suas características visuais, olfativas e gustativas, utilizando um método descritivo por um painel de degustadores da Embrapa Uva e Vinho (EMBRAPA/CNPUV) de Bento Gonçalves e da Associação Brasileira de Enologia (ABE), constituído por doze degustadores. De acordo com os resultados, os sucos das cultivares Isabel e Folha de Figo foram superiores aos demais, segundo a análise de componentes principais (ACP), principalmente pelas variáveis limpidez, equilíbrio olfativo, intensidade e corpo gustativo, persistência olfato-gustativa e julgamento geral (notas). O suco Folha de Figo foi superior ao Isabel quanto à tonalidade, sendo o primeiro caracterizado como vermelho-violáceo. A cultivar Folha de Figo é a mais utilizada na região para a produção de suco, podendo os produtores utilizarem também a cultivar Isabel, que mostrou potencial nas condições edafo-climáticas do sul de Minas Gerais. Termos para indexação:Vitis labrusca, cultivares, suco de uva, análise sensorial. ABSTRACTThe present work was designed to accomplish the characterization of the different grape juices of five grapevine cultivars of Vitis labrusca (Folha de Figo, Alwood, Concord, BRS-Rúbea e Isabel) according to their visual, smell and taste characteristics utilizing a descriptive method by a panel of tasters of Embrapa Grape and Wine (EMBRAPA/CNPUV) of Bento Gonçalves, and of the Brazilian Enology Association (ABE) consisting of 12 tasters. According to the results, the juices of the cultivars Isabel and Folha de Figo were higher than the others, analyzed statistically according to the Principal Component Analysis (PCA), mainly by the visual cleanliness variables, olfatory equilibrium, gustative body and quality, olfato-gustative persistence and general judgement (scores) and the juice of Folha de Figo was higher than Isabel according to visual shade, the former being characterized as violet-red. Folha de Figo is the most used cultivar for grape juices. Isabel would be also used, with a great potential in the environmental conditions of the south of Minas Gerais estate.

Maturação e qualidade de uvas para suco em condições tropicais, nos primeiros ciclos de produção

“…Isso pode ter ocorrido em virtude dos sinais de murcha das bagas, já comentado, que teria acarretado maior concentração das substâncias presentes na polpa. Pereira et al (2008) observaram AT de 1,2, 0,9, 1,3, 1,7 e 0,8 g de ácido tartárico por 100 mL, na colheita, das cultivares Folha de Figo, Alwood, Concord, BRS Rúbea e Isabel, respectivamente, produzidas no sul de Minas Gerais. Também em cultivos no Estado de Minas Gerais, a AT encontrada por ocasião da colheita das uvas das cultivares Niágara Rosada, Folha de Figo, Syrah, Merlot e Moscato Embrapa foi de 0,9, 0,7, 1,1, 1,1 e 1,0 g de ácido tartárico por 100 mL, respectivamente (Abe et al, 2007).…”

Analytical characteristics and discrimination of Brazilian commercial grape juice, nectar, and beverage

“…Considering the variables evaluated, PC1 discriminated − values within parentheses represent the correlation coefficients r between the variables and the principal components -pH (-0.994), Rb (-0.988), total polyphenols (-0.986), P (-0.974), titratable acidity (-0.957), ashes (-0.954), color intensity (-0.933), density (-0.932), total sugars (-0.932), tartaric acid (-0.930), OD at 620 nm (-0.926 Whole and sweetened juices were analytically similar because in general they were characterized by higher (PEREIRA et al, 2008); j) the characterization of 20 grape juices according to their mineral and heavy metal contents (ASSIS et al, 2008); and k) characterization of grape juices made in two Brazilian viticultural regions (SANTANA et al, 2008).…”

Thermal requirement and phenology of different cultivars of Vitis labrusca on different rootstocks

“…The cultivars 'Concord' and 'Bordô', 157 days for the two cultivars, in the South of Minas Gerais (PEREIRA et al, 2008 Means followed by the same lowercase letter in the column and uppercase on the line do not differ significantly by Tukey test at 5% for scion cultivars within the same cycle.…”

“…However, for the cultivar Bordô, which ranged from 24 to 32 days in 2011/2012, it was reduced to just 10 to 19 days in the subsequent seasons (Figure 1). In study in Minas Gerais was reported for 'Concord' a period of 27 days (PEREIRA et al, 2008), but in the Serra Gaúcha, RS, was obtained higher values, 33 days for the Bordô and Concord cultivars (MANDELLI et al, 2003). There was a significant interaction for the sum of degree-days between scion and rootstock combinations used.…”

“…Phenology varies according to genotype and climatic conditions of each region or from the same region due to seasonal climate throughout the year SENTELHAS, 2003). To understand this variation several authors assess cultivars during consecutive season and use phenological scales to compare and to establish each proper stage to cultivar (GONÇALVES et al, 2002;ANDERSON et al, 2003;MANDELLI et al, 2003;PEREIRA et al, 2008;BROETTO et al, 2011;PRADUBSUK;DAVENPORT, 2011;ANZANELLO et al, 2012). Another method to estimate the duration of the development stages of the vines is the use of thermal index or degree-days (DD).…”