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Early defoliation reduces cluster compactness and improves grape composition in Mando an autochthonous cultivar of Vitis vinifera from southeastern Spain

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URI
http://hdl.handle.net/20.500.11939/5401
DOI
10.1016/j.scienta.2013.12.036
Derechos de acceso
openAccess
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Author
Intrigliolo, Diego S.; Llácer, Elena; Revert, Javier; Esteve, María D.; Climent, María D.; Palau, David; Gomez, Ivan
Date
2014
Cita bibliográfica
Intrigliolo, Diego S., Llacer, E., Revert, J., Dolores Esteve, M., Dolores Climent, M., Palau, David, Gomez, Ivan (2014). Early defoliation reduces cluster compactness and improves grape composition in Mando an autochthonous cultivar of Vitis vinifera from southeastern Spain. Scientia Horticulturae, 167, 71-75.
Abstract
In the old-world viticulture autochthonous varieties are an important inheritance because they can provide wines with authenticity and distinction. Cultivar Mando is an almost extinct variety from southeastern Spain, which is used by a few wineries for elaborating premium quality wines. The aim of this 3-seasons long experiment was to assess the usefulness of early defoliation to reduce cluster compactness and to improve grape composition. Early defoliation, consisting of removal of all leaves from the first eight nodes, was tested at 3 different timings: just before anthesis, at flowering, and at fruit set. Non-defoliated vines were considered as a control. Yield and grape composition parameters were evaluated. Early defoliation, especially at fruit set, reduced cluster compactness and yield but increased total phenolics, anthocyanins and tannins concentration in berries. In the three seasons, total soluble solids concentration showed a tendency to increase in defoliated vines, while titratable acidity and pH were not clearly affected by the leaf pulling applications. Berry tasting was also improved by defoliation. As a consequence, defoliation carried out at fruit set is now widely conducted in the Mando vineyards in the area for premium wine production. (C) 2014 Elsevier B.V. All rights reserved.
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