Foliar treatments using two products based on Saccharomyces cerevisiae inactive dry yeast derivatives with specific formulations for white and red varieties were tested in two consecutive vintages on Vitis vinifera L. cv. Chardonnay, Cortese, and Nebbiolo grown in Piedmont (north-west Italy). The possible elicitor effect of the foliar treatment was assessed at harvest on the chemical composition and mechanical properties of grape berries. The accumulation and extractability of phenolic compounds in Nebbiolo grape skins were also studied. Wines were produced and analysed in terms of technological parameters, color characteristics, free volatile composition, and phenolic compounds. The treatments induced an +16 μm average increase in berry skin thickness, which makes the grapes more resistant to physical damages and pathogenous attacks. In Nebbiolo, this treatment enhanced the accumulation of anthocyanins (+33 mg/kg on average). However, the obtained results pointed out a vintage effect. In 2015, few significant differences between wines made from control and treated grapes were found. Instead, in 2016, Nebbiolo treated wines had a slightly worse chromatic quality as a consequence of lower contents of phenolic compounds, but they were richer in relative amounts of malvidin-3-glucoside.

Impact of specific inactive dry yeast application on grape skin mechanical properties, phenolic compounds extractability, and wine composition

Giacosa, Simone
First
;
Ossola, Carolina;Botto, Riccardo;Río Segade, Susana
;
Paissoni, Maria Alessandra;Pollon, Matteo;Gerbi, Vincenzo;Rolle, Luca
Last
2019-01-01

Abstract

Foliar treatments using two products based on Saccharomyces cerevisiae inactive dry yeast derivatives with specific formulations for white and red varieties were tested in two consecutive vintages on Vitis vinifera L. cv. Chardonnay, Cortese, and Nebbiolo grown in Piedmont (north-west Italy). The possible elicitor effect of the foliar treatment was assessed at harvest on the chemical composition and mechanical properties of grape berries. The accumulation and extractability of phenolic compounds in Nebbiolo grape skins were also studied. Wines were produced and analysed in terms of technological parameters, color characteristics, free volatile composition, and phenolic compounds. The treatments induced an +16 μm average increase in berry skin thickness, which makes the grapes more resistant to physical damages and pathogenous attacks. In Nebbiolo, this treatment enhanced the accumulation of anthocyanins (+33 mg/kg on average). However, the obtained results pointed out a vintage effect. In 2015, few significant differences between wines made from control and treated grapes were found. Instead, in 2016, Nebbiolo treated wines had a slightly worse chromatic quality as a consequence of lower contents of phenolic compounds, but they were richer in relative amounts of malvidin-3-glucoside.
2019
116
1084
1093
inactive dry yeasts, grapes, wines, texture analysis, phenolic composition, volatile compounds
Giacosa, Simone; Ossola, Carolina; Botto, Riccardo; Río Segade, Susana; Paissoni, Maria Alessandra; Pollon, Matteo; Gerbi, Vincenzo; Rolle, Luca...espandi
File in questo prodotto:
File Dimensione Formato  
Giacosa et al accepted manuscript.pdf

Open Access dal 26/09/2019

Tipo di file: POSTPRINT (VERSIONE FINALE DELL’AUTORE)
Dimensione 2.98 MB
Formato Adobe PDF
2.98 MB Adobe PDF Visualizza/Apri
Giacosa et al supplementary data.pdf

Open Access dal 26/09/2019

Tipo di file: DATASET
Dimensione 1.1 MB
Formato Adobe PDF
1.1 MB Adobe PDF Visualizza/Apri
Giacosa et al 2019.pdf

Accesso riservato

Tipo di file: PDF EDITORIALE
Dimensione 373.25 kB
Formato Adobe PDF
373.25 kB Adobe PDF   Visualizza/Apri   Richiedi una copia

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2318/1680263
Citazioni
  • ???jsp.display-item.citation.pmc??? 3
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 12
social impact