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IVES 9 IVES Conference Series 9 Postharvest ozone treatment in grapevine white cultivars: Effects on grape volatile composition

Postharvest ozone treatment in grapevine white cultivars: Effects on grape volatile composition

Abstract

During postharvest management, the metabolism of fruits remains active and continuous physico-chemical changes occur. Ozone treatment has an elicitor effect on secondary metabolites and the treatment conditions can influence the grape response to the stress (Bellincontro et al., 2017; Botondi et al., 2015). Regarding volatile organic compounds (VOCs), previous studies showed that ozone treatment during postharvest dehydration induces the biosynthesis of terpenes in Moscato bianco grapes (Río Segade et al., 2017). It is well known that grape VOCs greatly influence the organoleptic properties of wines, particularly terpenes in aromatic varieties. Therefore, the aim of this study was to know the VOCs response to oxidative stress during postharvest ozone treatment in Galician white cultivars Albariño, Godello and Blanco Lexítimo (Vitis vinifera L.) from Ribeira Sacra wine region (Galicia, Spain). Grape samples from 2021 and 2022 vintages were exposed during 24 hours to ozone (30 mg/L) and air (control) at 10 ºC. Grape free and glycosylated volatile compounds were determined by SPE/GC–MS.

The results obtained showed that the ozone treatment effect on grapes volatiles depends of cultivar and vintage studied. In general, ozone caused an increase of total content of terpenes in all cultivars, however a decrease of C6 compounds was also observed. In free fraction an increase of terpenes was observed in all cultivars by ozone application. However, in bound fraction, terpenes, C13-norisoprenoids and esters showed an increase in Godello (2021) and Blanco lexítimo (2022). Free and bound C6 compounds decreased in all cultivars in 2022 vintage.

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DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Mar Vilanova1,4*, Bianca S. Costa1, María Fandiño2, Marta Rodríguez-Febereiro2, Rubén Pérez3, Javier Cancela2,4

1 Instituto de Ciencias de la Vid y el Vino, 26007 Logroño (España)
2 Universidade de Santiago de Compostela – EPSE, 27002 Lugo (España)
3 Adega Ponte da Boga, Castro Caldelas, 32764 Ourense (España)
4 CropQuality: Crop stresses and their effects on quality, Associate Unit USC-CSIC(ICVV)

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Keywords

Galicia, terpenes, C6 compounds, volatile organic compounds, grapes

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

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