Chitosan and Laminarin as Alternatives to Copper for Plasmopara viticola Control: Effect on Grape Amino Acid

  1. Garde-Cerdán, T. 3
  2. Mancini, V. 2
  3. Carrasco-Quiroz, M. 1
  4. Servili, A. 2
  5. Gutiérrez-Gamboa, G. 3
  6. Foglia, R. 2
  7. Pérez-Álvarez, E.P. 3
  8. Romanazzi, G. 2
  1. 1 Universidad de Talca
    info

    Universidad de Talca

    Talca, Chile

    ROR https://ror.org/01s4gpq44

  2. 2 Marche Polytechnic University
    info

    Marche Polytechnic University

    Ancona, Italia

    ROR https://ror.org/00x69rs40

  3. 3 Instituto de Ciencias de la Vid y del Vino
    info

    Instituto de Ciencias de la Vid y del Vino

    Logroño, España

    ROR https://ror.org/01rm2sw78

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Revista:
Journal of Agricultural and Food Chemistry

ISSN: 0021-8561

Año de publicación: 2017

Volumen: 65

Número: 34

Páginas: 7379-7386

Tipo: Artículo

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DOI: 10.1021/ACS.JAFC.7B02352 PMID: 28759217 SCOPUS: 2-s2.0-85028569714 GOOGLE SCHOLAR

Otras publicaciones en: Journal of Agricultural and Food Chemistry

Resumen

Copper fungicide use is limited by the European regulation; therefore, new strategies have been developed to prevent grapevine downy mildew (GDM). However, there is poor information about their effects on grape amino acid composition. This field trial aimed to evaluate the effect on grape amino acid composition of chitosan and of a mixture of laminarin and Saccharomyces extracts (LamE), applied in different strategies with copper hydroxide. The results showed that all the treatments applied to grapevines decreased the concentration of several amino acids. Moreover, treatments that have mostly decreased these compounds are those with copper hydroxide, especially when applied individually. LamE applied individually or alternately with copper hydroxide had the least negative effect on grape amino acid content. These results provide further information about the negative effects of copper on grape quality, which can be reduced when it is used in strategy with LamE or chitosan in GDM control. © 2017 American Chemical Society.