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Gardin J.P.P.,Estacao Experimental de Videira | Schumacher R.L.,University of Castilla - La Mancha | Bettoni J.C.,Embrapa Clima Temperado | Petri J.L.,Estacao Experimental de Cacador | De Souza E.L.,Est. Exp. de Videira
Revista Brasileira de Fruticultura | Year: 2012

This study aimed to determine the effects of exogenous application of ABA and ETEFOM on the maturation and quality of Cabernet Sauvignon. This study was performed in a vineyard, located at the Experimental Station of Videira - Epagri - SC, during the 2009/2010 harvest. The doses of 0, 20, 40 g i.a.100L-1 of the abscisic acid (ABA) and 0, 136.8 and 273.6 g i.a. 100L-1 of ETEFOM, forming a 3×3 factorial design. The treatments were applied at the beginning of the color change 'veraison'. The variables were analyzed in grapes anthocyanins, total polyphenol, CIRG index (color index for red grapes), antioxidant activity, total soluble solids (°Brix) and titratable acidity. The results show improvement in the quality of grapes with the use of ABA and ETEFOM combinations, increased CIRG index, polyphenols, anthocyanins and sugars. Source


Dalbo M.A.,Estacao Experimental de Videira | Schuck E.,Estacao Experimental de Videira | Basso C.,Estacao Experimental de Videira
Revista Brasileira de Fruticultura | Year: 2011

Genetic diversity of rootstocks can affect nutrient uptake and the nutrient status of grapevines. The rootstock influence on nutrient content in grape petioles was evaluated on three rootstocks competition experiments carried out at Vale do Rio do Peixe region, in the state of Santa Catarina, Brazil, with the cultivars Niagara Rosada, Concord, and Isabella, grafted on different rootstocks. Two soil liming depths were also evaluated in the Isabella experiment. The greatest rootstock effect was observed on K and Mg content and K/Mg ratio in the petioles. The Vitis vinifera x V. rotundifolia hybrid rootstocks VR 043-43 and VR 044-4 provided the highest K/Mg values and self rooted Isabella the lowest K/Mg ratio. The other tested rootstocks resulted in intermediate values. There was also significant effect on P content, but only in Niagara Rosada and Concord experiments. The depth of soil liming did not significantly affect K and Mg content in the Isabella experiment. The results indicate that rootstock must be considered for nutritional status evaluation and fertilizer recommendation regarding to K and Mg. Source

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