Influence of different withering conditions on phenolic composition of Avanà, Chatus and Nebbiolo grapes for the production of ‘Reinforced’ wines

Milena Lambri, Fabrizio Torchio, Vincenzo Gerbi, Delia Elena Urcan, Lin Lin, Simone Giacosa, Susana Río Segade, Nastasia Pop, Luca Rolle

Risultato della ricerca: Contributo in rivistaArticolo in rivistapeer review

16 Citazioni (Scopus)

Abstract

The impact of postharvest withering rates on the phenolic composition of ‘reinforced’ wines produced with partially dehydrated grapes was evaluated. The study was performed on winegrape varieties with anthocyanin profiles differently constituted of di- and tri-substituted forms. Dehydration induced limited changes in the anthocyanin profile of berry skins. Nevertheless, the greatest abundance of total antho- cyanins and their more stable forms (malvidin-3-glucoside and acylated glucosides) corresponded to the wines made from slow withered Chatus grapes, which were in turn the darkest. In contrast, the wines made from withered Avanà grapes did not meet good chromatic characteristics due to low contents of total anthocyanins and high ratios between di- and tri-substituted forms. Nebbiolo wines showed inter- mediate values of this ratio, and therefore of clarity and color intensity. The fast process is recommended because higher percentages of galloylated flavanols in the seeds of slow withered Nebbiolo grapes may have a negative influence on wine astringency.
Lingua originaleEnglish
pagine (da-a)247-256
Numero di pagine10
RivistaFood Chemistry
Volume194
DOI
Stato di pubblicazionePubblicato - 2016

Keywords

  • grapes
  • phenolic compounds
  • withering

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