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Poços de Caldas, Brazil

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

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. Source

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

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. Source

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

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. Source

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

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. Source

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.

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. Source

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