terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 White grape must processed by UHPH as an alternative to SO2 addition: Effect on the phenolic composition in three varieties

White grape must processed by UHPH as an alternative to SO2 addition: Effect on the phenolic composition in three varieties

Abstract

The quantity and distribution of polyphenols in musts play a fundamental role in the white winemaking. This is because these substances are exposed to oxidation reactions, which are catalysed by the polyphenol oxidase (PPO), leading to a decrease in the quality of the wines produced. PPO is inactivated by SO2, but currently, due to the restrictions of the legislation, other methodologies are being investigated. Ultra-High Pressure Homogenization (UHPH) is a non-thermal physic technology that exerts an ultrahigh pressure pumping (>200 MPa) of a fluid through a valve in a continuous system. Passing through the valve causes a series of mechanical forces (impact, shear, cavitation, friction) which produce an antimicrobial and anti-enzymatic effect, as well as nanofragmentation in biopolymers. Since both, phenolic composition and PPO activity, depend on the variety, the research of the response of musts from different varieties to this technique is essential. This work investigates, by using HPLC techniques, the response of polyphenol oxidase activity, flavonols, flavanols, phenolic acids and total phenols to the application of a) the UHPH technique (working flow rate: 60 L/h, at 300 ± 3 MPa, inlet T of 4ºC, in-valve T of 95 ± 2 ºC for less than 0.2 s and an outlet T of 14 ºC) and b) SO2 (total dose 60 mg/L) of musts of Xarel·lo (Xar), Moscatel de Alexandria (M) and Garnacha blanca (Gb) from the 2022 vintage. The impact of the techniques applied depended on the variety considered and the effectiveness of UHPH could be established in the following pattern: Xar ≥ M > Gb. Moreover, phenolic acids were more sensitive to the action of SO2 than the UHPH. In general, with the exception of M must, phenolic acids, flavanols and total phenols responded similarly to both treatments applied.

Acknowledgements: This work is founded by Operational Groups of the European Association for Innovation (AEI) in terms of agricultural productivity and sustainability (operation 16.01.01 of the Rural Development Program of Catalonia (PDR) 2014-2022). Generalitat de Catalunya.

DOI:

Publication date: October 13, 2023

Issue: ICGWS 2023

Type: Poster

Authors

M. Esperanza Valdés-Sánchez1, Daniel Moreno-Cardona1, Nieves Lavado-Rodas1, Angela Fondon-Aguilar1, Gemma Roca-Domènech2 and Anna Puig-Pujol2

1Food and Agriculture Technology Institute of Extremadura (CICYTEX_INTAEX). Adolfo Suárez s/n Avenue, Badajoz, 06071, Spain
2INCAVI-IRTA. Catalan Institute of Vine and Wine – Institute of Agrifood Research and Technology. Plaça Àgora, 2. 08720 Vilafranca del Penedès, Barcelona, Spain

Contact the author*

Keywords

Xarel·lo, Moscatel, Garnacha blanca, flavonols, flavanols, phenolic acids

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

High-throughput sequencing analysis based on nematode indices revealed healthier soils of organic vineyards 

Proper soil health assessments are crucial for sustainable cropland. Among the widely employed approaches, evaluating nematode community structure is particularly suitable. Traditionally, the taxonomic characterization of soil nematodes has relied on time-consuming morphology-based methods requiring experienced experts. However, molecular tools like high-throughput sequencing have emerged as efficient alternatives. In this study, we performed a metataxonomic analysis of soil samples collected from 57 vineyards in the DOCa Rioja region of Northern Spain, focusing on the impact of organic viticulture and cover cropping compared to integrated pest management (IPM) and tilling practices.

Acceptability of canned wines: effect of the level of involvement of consumers and type of wine

In recent years there has been a growing demand for alternative packaging designs in the food industry focused on diminishing the carbon footprint. Despite the environmental advantages of cans versus bottles, the traditional environment of wine has hindered the establishment of less contaminant containers. In this context, the objective of this study was to understand and generate knowledge about consumers´ perception of canned wines in comparison to bottled wines.

Effect of drought on grapevine wood fungal pathogen communities using a metatranscriptomics approach

Crops are facing increasing biotic and abiotic stress pressures due to global changes. However, trade-off mechanisms between these stresses and the underlying physiological processes are still poorly understood, especially in perennial crop species. To better understand these trade-offs, we studied the effect of drought on grapevine (Vitis vinifera) physiology and esca-related wood fungal communities. Esca is a vascular disease caused by a community of wood-infecting pathogenic fungi, and characterized by trunk necrosis, leaf scorch symptoms, yield losses, and mortality.

Water availability at budbreak time in vineyards that are deficitary irrigated during the summer: Effect on must volatile composition


In recent years, Mediterranean regions are being affected by marked climate changes, primarily characterized by reduced precipitation, greater concurrence of temperature extremes and drought during the growing season, and increased inter-annual variability in temperatures and rainfall. Generally, high-quality red wines need moderate water deficit. Hence, irrigation may be needed to avoid severe vine water stress occurring in some vintages and soils with low holding capacity. The aim of this work was to evaluate the effects of soil recharge irrigation in pre-sprouting and summer irrigation every week (30 % ETO) from the pea size state until the end of ripening (RP) compared to exclusively summer irrigation every week (R) in the same way that RP, on must volatile composition at harvest.

Evaluation of terroir suitability for vine cultivation in new areas using geographic multi-criteria decision support

Based on historical vine cultivation, the recent development of wine production in Drama wine region (Greece) has led to vine cultivation expansion of white and red varieties. The current cultivation of 500 ha of vineyards is expected to increase in the coming years. Natural terroir units (NTU) have been designed recently to support the production of high quality wines in the region [1]. The aim of this work is to evaluate the relevancy of the proposed NTUs regarding their suitability to produce wines of specific sensorial identity, and to provide guidelines for correct site selection for the expanding wine industry of the region.