Evaluation of winegrape anthocyanins in the vineyard using a portable fluorimetric sensor: seasonal and water regime effects
Abstract
Accumulation of anthocyanins (Anth) on whole winegrape (Vitis vinifera L.) bunches attached to the vine was monitored by a fluorescence-based sensor (Multiplex) on ‘Aleatico’ and ‘Nero d’Avola’. Different water regimes wereapplied. The Anth index (ANTH) provided by the Multiplex sensor was able to detect a shift in the berry ripening curve of ‘Aleatico’ between two consecutive seasons: it was at least one week anticipated in 2009 with respect to 2008, as also confirmed by the visual estimation of veraison onset and by the time evolution of technological maturity. For both cultivars under different water regimes, the ANTH index indicated that in plants under water stress the rate of Anth accumulation was increased with respect to those undermoderate water deficit. The Multiplex sensor resulted to be an useful device for the rapid and non- invasive estimation of Anth in the vineyard.
Issue: Macrowine 2010
Type: Article
Authors
1Dip. Coltivazione e Difesa delle Specie Legnose, Univ. Pisa, Pisa, I.
2Dip. Scienze Farmaceutiche, Univ. Firenze, Sesto Fiorentino, FI, I.
3Sant’Anna School of Advanced Studies, Pisa, I.
4Gruppo Mezzacorona, Mezzocorona, TN, I.
5Istituto di Fisica Applicata ‘N. Carrara’ – CNR, v. Madonna del Piano 10, 50019 Sesto Fiorentino, FI, I.