Nucleo Tecnologico EPAMIG Uva e Vinho

Poços de Caldas, Brazil

Nucleo Tecnologico EPAMIG Uva e Vinho

Poços de Caldas, Brazil
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da Mota R.V.,Nucleo Tecnologico EPAMIG Uva e Vinho | de Amorim D.A.,Nucleo Tecnologico EPAMIG Uva e Vinho | Favero A.C.,Federal University of Lavras | Purgatto E.,University of Sao Paulo | Regina M.A.,Nucleo Tecnologico EPAMIG Uva e Vinho
Ciencia e Tecnologia de Alimentos | Year: 2011

Based on the concept that the trellising system affects not only sunlight interception and carbon assimilation, but also the fruitzone microclimate, which has a great impact on fruit composition and consequently on wine quality, the effect of two trellising systems - Vertical Shoot Position (VSP) and modified Geneva Double Curtain (GDC) - on wine and berry composition of Syrah grapes grown in João Pinheiro, Northeast region of Minas Gerais State, Brazil was investigated. The parameters such as pH, berry size and weight, and seeds total phenolic contents were not affected by the training system. The GDC system produced fruits with the highest Brix and lowest titratable acidity. Berries from the VSP system presented lower anthocyanin concentration than those from the GDC system. Similar results were found for the total phenolic content of the skin of grape berries from the VSP system. GDC wines were characterized by high anthocyanin content and red color, resulting in wines with high color intensity. These data suggest that in the tropical region of Minas Gerais state, with high temperature and high sunlight intensity, the trellising system, which protects bunches against excessive radiation, should be chosen.

da Mota R.V.,Nucleo Tecnologico EPAMIG Uva e Vinho | de Souza C.R.,Nucleo Tecnologico EPAMIG Uva e Vinho | Silva C.P.C.,Nucleo Tecnologico EPAMIG Uva e Vinho | Freitas G.D.F.,Federal University of Lavras | And 4 more authors.
Bragantia | Year: 2010

The control of leaf to fruit ratio by the practice of entire clusters removal from the vine upon berry set has been used in traditional vineyards in order to regulate yield and to improve chemical composition of the berries. Although this practice has been settled in temperate zones, little is known about grapevines behavior in tropical growing areas. The aim of this work was to evaluate the biochemical and agronomical responses of two Vitis vinifera cultivars (Merlot and Cabernet Sauvignon) grown in Caldas, Minas Gerais, Brazil, a new winegrape region. Grapevines were submitted to cluster thinning (0%, 50% and 75% of cluster removal) and trimming treatments (trimmed and untrimmed) imposed at pea size stage. The source-sink alteration by fruit removal and shoot trimming had impact on yield, leaf sugar metabolism and grape composition. Although there was an improvement in color intensity of the berries with reduction of fruit load, the cluster thinning practice should be avoided in vineyards grown in the south of Minas Gerais State without impairment of wine grape quality. On the other hand, shoot trimming practice should be recommended only for Merlot in order to improve sugar grapes from vines with no cluster removal.

da Mota R.V.,Pesquisadora do Nucleo Tecnologico EPAMIGUvaeVinho | Silva C.P.C.,Nucleo Tecnologico EPAMIG Uva e Vinho | do Carmo E.L.,Brazilian National Council for Scientific and Technological Development | Anderson R.F.,Brazilian National Council for Scientific and Technological Development | And 4 more authors.
Revista Brasileira de Fruticultura | Year: 2010

This work aimed on evaluating the influence of training systems in berries composition of 'Niágara Rosada' and 'Folha-de-Figo' grapevines grown in Caldas, MG. Yield per plant; diameter, weight, temperature and potassium content of the berries; pH, soluble solids, reducing sugars, total acidity and organic acids of the must; anthocyanins and phenolic compounds of the skins and phenolic compounds of the seeds were evaluated in grapevines training in vertical shoot position, lyre trellis, pergola Veronese or simple string in 2006 and 2007 seasons. 'Niágara Rosada' and 'Folha-de-Figo' grapevines training in pergola Veronese and lyre trellis, respectively, showed higher yield than the other training systems under study. Berries grown under the four different training systems were cooler than ambient temperature, resulting from partial or deep shade clusters. Berries harvested from pergola Veronese trellis system showed lower soluble solids and reducing sugars levels in both cultivars. These preliminary data show that training systems exerted little influence on berries composition.

Da Mota R.V.,Nucleo Tecnologico EPAMIG Uva e Vinho | Favero A.C.,Nucleo Tecnologico EPAMIG Uva e Vinho | Silva C.P.C.,Nucleo Tecnologico EPAMIG Uva e Vinho | Purgatto E.,University of Sao Paulo | And 2 more authors.
Journal International des Sciences de la Vigne et du Vin | Year: 2011

Aims: Geographical indication plays an important role in the improvement of wine quality. In this context, the search for new grape growing areas has been constant. The São Francisco River Valley in the cerrado of Minas Gerais State (Brazil) has been pointed out in the Geoviticulture Multicriteria Climatic Classification System (MCC System) as a potentially winegrowing region, especially considering the autumn-winter period when night temperatures are favorable to grape ripening. In this work, we studied the maturation curves and fruit composition of four wine grape varieties (Syrah, Merlot, Cabernet-Sauvignon and Cabernet Franc) in two growing seasons in order to validate the state of Minas Gerais as a new winegrowing region in Brazil. Methods and results: Quality parameters (berry weight, pH, titratable acidity and total soluble solids) were measured weekly from véraison to harvest, and sugar, organic acid, anthocyanin and phenolic concentrations were determined in must and berry skins and seeds at harvest. Syrah berries showed the highest weight throughout maturation which contributed to higher yield (8.92 ton ha-1), followed closely by Merlot (8.07 ton ha-1). Berry sugar concentrations were higher and malic acid levels were lower than the values usually observed in wine grapes harvested during summer in traditional winegrowing regions in Brazil. Cabernet Franc showed lower levels of anthocyanins and skin phenolics per kg berries and the highest values of seed phenolics, which were not affected by growing season. Conclusion: Weather conditions of the cerrado of Minas Gerais State in Brazil during winter allowed complete maturation of Cabernet-Sauvignon, Cabernet Franc, Merlot and Syrah cultivars as revealed by the satisfactory sugar, anthocyanin and skin phenolic accumulation. Significance and impact of the study: This study revealed the potential of the cerrado ecoregion in the northeast of Minas Gerais to become a new winemaking region in Brazil. © Vigne et Vin Publications Internationales.

Regina M.A.,Nucleo Tecnologico EPAMIG Uva e Vinho | Purgatto E.,University of Sao Paulo | Shiga T.M.,University of Sao Paulo | Lajolo F.M.,University of Sao Paulo | da Mota R.V.,Nucleo Tecnologico EPAMIG Uva e Vinho
Revista Brasileira de Fruticultura | Year: 2010

In the southern and southeastern of Brazil, the excessive rainfall during the maturation period negatively affects the quality of red wines. On the other hand, these regions have great potential for the development of sparklings since that for the elaboration of this drink, the grape is harvested before complete its maturation. In the state of Minas Gerais, the conditions of rainy summer season are present in all regions of grape production potential, and the altitude variation between them influence on the grapes composition. Therefore, this study sought to evaluate the potential for maturing of the grapes 'Chardonnay' and 'Pinot Noir' which are designated for the preparation of sparklings in two locations of Minas Gerais: Cordislândia (873m) and Caldas (1150m). The plants were grafted on 1103 Paulsen and conducted in vertical shoot position trellis. It was evaluated the contents of total soluble solids, total acidity, malic and tartaric acid, and pH of the must, size and mass of the berries, phenolic compounds in the peels and in the seeds, anthocyanins in the peels and soluble sugars in the berries in two growing seasons. The berries had higher size and mass when grown in Caldas. The grapes harvested in Cordislândia presented a higher maturity degree, and it was observed a higher pH, higher levels of glucose and fructose, and a lower amount of acidity and total phenolic content in the seeds. The highest levels of malic acid present in the grapes of Caldas suggest that this region may be more appropriate for the production of grapes which are used for making sparklings.

Favero A.C.,Federal University of Lavras | Angelucci De Amorim D.,Nucleo Tecnologico EPAMIG Uva e Vinho | Vieira Da Mota R.,Nucleo Tecnologico EPAMIG Uva e Vinho | Soares A.M.,Federal University of Lavras | And 2 more authors.
Vitis - Journal of Grapevine Research | Year: 2011

Grape harvest in the major grapevine growing regions of Brazil occurs during the summer; a period with excessive rainfall. The climatic conditions during the Brazilian summer can have an adverse effect on fruit maturation and wine quality. This study compared the performance of 'Syrah' grapevines cultivated in two growing seasons. A double pruning management system was employed as a technique in the vineyard and the grapevines were cultivated in summer, a cycle normally adopted in the South and Southeast of Brazil and winter during 2005 and 2006 in a non-irrigated vineyard. Vine water stress was minimal for both growing seasons and photosynthetic rates were found to be lower in the winter than the summer. However, no differences in vegetative vigor were observed. The growing season was shorter in summer than in winter. This was predominately due to a faster ripening period in the summer. During the winter harvests, grapevines had a higher yield, accumulation of sugar, anthocyanins and total phenolic compounds, and the lowest rot incidence. Double-pruning proved to be a powerful tool to improve wine grape composition in the Brazilian Southeast. This management will allow the production of quality raw materials for the production of good wines, allowing Southeastern Brazil to enter the competitive globalized wine market.

Favero A.C.,Federal University of Lavras | de Amorim D.A.,Nucleo Tecnologico EPAMIG Uva e Vinho | da Mota R.V.,Nucleo Tecnologico EPAMIG Uva e Vinho | de Souza C.R.,Nucleo Tecnologico EPAMIG Uva e Vinho | de Albuquerque Regina M.,Nucleo Tecnologico EPAMIG Uva e Vinho
Scientia Agricola | Year: 2010

Plant architecture and its interaction with agricultural practices and environmental constraints is determinant for grapevine canopy structure, which is related to carbon assimilation, bud fertility and fruit quality. In this context, this study evaluated the performance of field-grown 'Syrah' grapevines conducted by two management systems: Vertical Shoot Position (VSP) or a modified Geneva Double Curtain (GDC), in Pirapora, state of Minas Gerais, Brazil, during the winters of 2007 and 2008. The evaluations of leaf area, water relations and net CO2 assimilation were made at the end of the ripening period. Yield per vine and per hectare were estimated and mean berry weight and diameter, total soluble solids, pH and titratable acidity were evaluated during berry ripening. The grapevines trained in VSP had higher water status as compared to GDC, shown by differences in pre-dawn leaf water potential (Ψpd) and stem water potential (Ψstem). However, the CO2 assimilation was similar in both training systems. Fruit exposure was higher in VSP than in GDC, which contributed to increasing berry temperature. At harvest, the berries in GDC reached values near to 23 °Brix whereas berries in VSP showed values near 21 °Brix.

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