Metabolomics of grape dehydration process

Luigi Bavaresco, M De Rosso, S Soligo, A Panighel, A Dalla Vedova, R. Flamini

Risultato della ricerca: Contributo in libroContributo a convegno

Abstract

Recently, a mid-way method between “targeted” and “untargeted” analysis (suspect screening analysis) was developed to study grape metabolomics. For the identification of metabolites, a new electronic database of putative grape and wine compounds (GrapeMetabolomics) was expressly constructed which currently contains around 1,100 entries. By performing high-resolution mass spectrometry analysis in a grape extract averaging 320-450 putative compounds are identified, depending on the variety. In the present work this approach was applied to study the chemical changes occurring in grape during dehydration process. In particular, changes in anthocyanins, polyphenols and flavonols, stilbene derivatives, and glycoside aroma precursors, were studied by performing PCA. In the red grape samples an increase of stilbene monomers and oligomers accompanied by decrease of glucoside stilbenes and some other polyphenols, was observed. Flavonols did not change significantly after 15 days, instead a loss of anthocyanins was found after 30 days. These preliminary results indicate the best drying time of these grape varieties under the experimental conditions used to produce raisins wines richer in secondary metabolites.
Lingua originaleEnglish
Titolo della pubblicazione ospiteBIO Web of Conferences - 37th World Congress of Vine and Wine and 12th General Assembly of the OIV
PagineN/A
Stato di pubblicazionePubblicato - 2014
Evento37th OIV World Congress - Mendoza
Durata: 9 nov 201414 nov 2014

Convegno

Convegno37th OIV World Congress
CittàMendoza
Periodo9/11/1414/11/14

Keywords

  • Flavonols
  • anthocyanins
  • glycoside aroma precursors
  • grape metabolomics
  • high-resolution mass spectrometry analysis
  • stilbene derivatives

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