Vine vigour modulates bunch microclimate and affects the composition of grape and wine flavonoids: an unmanned aerial vehicle approach in a Sangiovese vineyard in Tuscany

• Y. Romboli ^[1] ; S.F. Di Gennaro ^[2] ; S. Mangani ^[1] ; G. Buscioni ^[1] ; A. Matese ^[2] ; L. Genesio ^[2] ; M. Vizencini ^[1]
  1. [1] University of Florence

     University of Florence

     Firenze, Italia

     
  2. [2] Institute of Biometeorology (IBIMET), National Research Council (CNR)
• Localización: Australian journal of grape and wine research, ISSN 1322-7130, Vol. 23, Nº 3, 2017, págs. 368-377
• Idioma: inglés
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• Resumen

  • Background and Aims This study focused on the impact of vine vigour on Sangiovese grapes and wines, applying a high-resolution remote sensing technique by an unmanned aerial vehicle (UAV) platform to identify vigour at the single vine level within a vineyard.

    Methods and Results A factorial field experiment was established combining two vigour classes (low and high) and two bunch positions within the canopy (north-facing and south-facing). The remote sensing technique by the UAV platform identified the heterogeneity in terms of vigour within the vineyard. Vine vigour influenced significantly the composition of anthocyanins, flavonols and flavan-3-ol monomers of the grapes and wines.

    Conclusions The work confirmed that UAV-based remote sensing enabled the successful evaluation of vine vigour at high resolution and that vigour influences the flavonoid monomeric compounds as a function of bunch position within the canopy.

    Significance of the Study Understanding the impact of spatial variability in a vineyard on grape composition should assist the viticulturist and winemaker toward the adoption of adequate viticultural management operations capable of adding value to their wines.