Ozone Improves the Aromatic Fingerprint of White Grapes

Fabrizio Torchio, Susana Río Segade, Mar Vilanova, Simone Giacosa, Irene Perrone, Walter Chitarra, Matteo Pollon, Paolo Boccacci, Giorgio Gambino, Vincenzo Gerbi, Luca Rolle

Risultato della ricerca: Contributo in rivistaArticolo in rivista

16 Citazioni (Scopus)

Abstract

Ozone, a powerful oxidative stressor, has been recently used in wine industry as sanitizing agent to reduce spoilage microflora on grapes. In this study, we evaluated ozone-induced metabolic and molecular responses during postharvest grape dehydration. Ozone increased the contents of total volatile organic compounds (VOCs), which have a great impact on the organoleptic properties of grapes and wines. Among terpenes, responsible for floral and fruity aroma, linalool, geraniol and nerol were the major aromatic markers of Moscato bianco grapes. They were significantly affected by the longterm ozone treatment, increasing their concentration in the last phases of dehydration (>20% weight loss). At molecular level, our results demonstrated that both postharvest dehydration and ozone exposure induce the biosynthesis of monoterpenes via methylerythritol phosphate (MEP) pathway and of aldehydes from lipoxygenase-hydroperoxide lyase (LOX-HPL) pathway. Therefore, transcriptional changes occurred and promoted the over-production of many important volatile compounds for the quality of white grapes
Lingua originaleEnglish
pagine (da-a)1-16
Numero di pagine16
RivistaOPEN ACCESS SCIENTIFIC REPORTS
Stato di pubblicazionePubblicato - 2017

Keywords

  • ozone, terpenes

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