terclim by ICS banner
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.

Download the abstract

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)

Contact the author*

Keywords

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

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Anthocyanins in tannat wines rapidly evolve toward unidentified red-coloured pigments

To assess the relationship between the reported low-stability of Tannat colour during wine storage and its pigment composition and evolution
Read More

Measurements of the oxygen dissolved in white wines elaborated in barrels without to open the bung of the barrels

Bases on oxoluminescence, we have developed an innovative device for measuring dissolved oxygen in wines in barrels without opening the bung. This system is directly inserted into the wood during the barrel elaboration and can be positioned at different locations of the barrel (the head, the hull …). During two successive vintages we have used this device notably to follow the oxygen dissolved of whites wines elaborated in barrels. This allowed us initially to monitor the oxygen levels of the harvest to bottling the whole elaboration process in barrels of white wines without using techniques of measurement suitable to modify the real values in wines (opening the bung to plunge an oximeter).

Read More

Effect of climate and soil on phenology and ripening of Vitis vinifera cv Touriga acional in the Dão region

“Terroir” has been acknowledged as an important factor in wine quality
and style. It can be defined as an interaction between climate, soil, vine (cultivar, rootstock) and human
factors such as viticultural and enological techniques. Soil and climate are the two components of the “Terroir” with an important role on the vine development and berries ripening. The present study is focused on the effects of the weather conditions and the soil characteristics on the phenological and berries ripening dynamics of the “Touriga Nacional” in Dão region.

Read More

Le zonage viticole: instrument pour la récuperation d’un ancien cépage des collines de Conegliano (Verdiso – V. vinifera)

Dans le contexte viticole actuel, la prise de conscience que chaque cépage ne trouve son expression qualitative maximale que dans certains terroirs bien définis

Read More

Nutrient absorption in vines (Vitis vinifera L., cv. Tempranillo blanco) under two water management approaches in a semiarid region of the north of Spain

Two treatments were studied in vines of cv. Tempranillo blanco (Vitis vinifera L.) during the 2012-2018 period in an experimental plot located in Rincón de Soto (La Rioja, Spain). Rainfed treatment (R0) was compared with respect to an irrigation treatment (R2) equivalent to 30% of the crop evapotranspiration (ET0) from fruitset to harvest phenological stages. Pre-veraison irrigation ranged from 43 (2014) to 66 mm/m2 (2018) while post-veraison irrigation ranged from 37 (2017) to 115 mm/m2 (2012).The normalized difference vegetation index (NDVI) was assessed by measures of reflectance, nutrients were determined by analysis of petioles sampled at veraison, grape production was determined at harvest as well as renewable wood weight was assessed at pruning time.

Read More