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    Por favor, use este identificador para citar o enlazar este ítem:https://uvadoc.uva.es/handle/10324/67378

    Título
    A preharvest treatment of ethephon and methyl jasmonate affects mechanical harvesting performance and composition of 'Verdejo' grapes and wines
    Autor
    Uzquiza Ollauri, LorenaAutoridad UVA
    González García, María RosaAutoridad UVA Orcid
    Martín Peña, PedroAutoridad UVA Orcid
    González Herranz, Raquel
    Fidelibus, Matthew W.
    Año del Documento
    2015
    Editorial
    International Society for Horticultural Science
    Descripción
    Producción Científica
    Documento Fuente
    European Journal of Horticultural Science, 2015, vol. 80, n.º 3, pp. 97-102
    Résumé
    Previously we showed that the combined application of ethephon and methyl jasmonate to grapes (Vitis vinifera L.) may decrease fruit detachment force and promote the formation of an abscission layer between the pedicels and berries, without causing preharvest yield losses or defoliation (Uzquiza et al., 2013). Theoretically, such effects could help minimize the physical damage to berries and the volume of must released during mechanical harvesting which could, in turn, reduce the opportunity for undesirable oxidative processes to occur before the product comes into the winery. The aim of this work was to study the effects of this treatment on mechanical harvesting performance, and on must and wine quality. The experiments were conducted in 2011 and 2013, in a 'Verdejo' vineyard located in 'Rueda' Appellation d'Origine area (North-Central Spain). In a completely randomized factorial design different treatments were compared, combining the application of abscission agents (ethephon 1,000 mg L<sup>-1</sup> plus methyl jasmonate 8,960 mg L<sup>-1</sup> sprayed on the clusters 10 days before harvesting, versus untreated controls), and type of harvest (manual picking and mechanical at different shaking frequencies, 400 and 425 shakes min<sup>-1</sup>). The preharvest treatment did not significantly affect product losses during mechanical harvesting at 400 shakes min<sup>-1</sup>but, at 425 shakes min<sup>-1</sup>, total losses in treated vines were 4.2% higher than in untreated. The percentage of free must in the harvested mass was lower in treated vines (20.6%) than in controls (23.2%) when shaking frequency was higher. The abscission agents tended to reduce potassium content in the must and increased hydroxycinnamic acid and total polyphenol contents, but they did not affect colour intensity or oxidative stability of wines.
    Materias (normalizadas)
    Vinos y vinificación
    Materias Unesco
    3309.29 Vino
    Palabras Clave
    Uva
    Plant growth regulators
    Abscission
    Oxidation
    Polyphenol
    Vitis vinifera L.
    ISSN
    1611-4426
    Revisión por pares
    SI
    DOI
    10.17660/eJHS.2015/80.3.1
    Version del Editor
    https://www.pubhort.org/ejhs/80/3/1/index.htm
    Idioma
    eng
    URI
    https://uvadoc.uva.es/handle/10324/67378
    Tipo de versión
    info:eu-repo/semantics/publishedVersion
    Derechos
    openAccess
    Aparece en las colecciones
    • DEP57 - Artículos de revista [101]
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    04 A preharvest treatment 2015.pdf
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    Attribution-NonCommercial-NoDerivatives 4.0 InternacionalExcepté là où spécifié autrement, la license de ce document est décrite en tant que Attribution-NonCommercial-NoDerivatives 4.0 Internacional

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