terclim by ICS banner
IVES 9 IVES Conference Series 9 Teran grape quality influenced by different irrigation treatments

Teran grape quality influenced by different irrigation treatments

Abstract

Teran is an important native variety grown in Istria known for its high level of polyphenols and intensive fruity character of wines. Teran’s yield and wine typicity have recently decreased due to climate changes (increased temperature and severe drought). Four drip irrigation treatments (25%, 50%, 75%, 100% of total evapotranspiration) and control were investigated for the influence on Teran yield and quality, where focus was given to the content and composition of main polyphenolic and volatile compounds in grapes. Irrigation positively influenced yield since the berry weight also increased with increased irrigation. This resulted in the highest yield for 100% ETc. The highest concentration of polyphenols had control, while the irrigation treatments did not differ significantly. However, there was a tendency to decrease concentration with increased irrigation probably due to the increased berry size, which led to a dilution effect. Regarding the volatile compounds, the most abundant group was alcohols, followed by acids. It seems that volatiles were not affected by irrigation as there is no significant difference between control and treatments, as well as among treatments. Even though the total content of volatiles was similar between treatments, there were significant differences among them in the content of esters, terpenes, and norisoprenoids, all very potent volatiles that can have an important impact on the sensory profile. Precise irrigation is necessary for yield management of Teran in changing environments due to the limited water availability, but grape quality and composition response must be precisely monitored to preserve wine quality and typicity.

Download the abstract

DOI:

Publication date: June 13, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Iva Šikuten1*, Darko Preiner1, Zvjezdana Marković1, Monika Zovko1, Davor Romić1, Marijan Bubola2, Jasminka Karoglan Kontić1

1 University of Zagreb Faculty of Agriculture, Svetošimunska 25, Zagreb, Croatia
2 Institute of Agriculture and Tourism Poreč, Karla Huguesa 8, Poreč, Croatia

Contact the author*

Keywords

Teran, Croatia, irrigation, polyphenols, volatiles

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Evolution of grape aromatic composition in cv. Ugni blanc

Cognac is a protected appellation of origin where world-famous brandies are produced. These brandies are obtained by the traditional double distillation of wines from Ugni blanc cultivar

Read More

Study of the evolution of tannins during wine aging by mass spectrometry monitoring of oxidation markers released after chemical depolymerization

Among the many compounds in wine, condensed tannins play an important role in the organoleptic properties of the products; they are partly responsible for astringency, bitterness and also contribute to the color. This research work aims to study the oxidation state of these bio-heteropolymers which is an important lock in the analysis of processed products in order to better control their quality. Indeed, their identification remains at present a challenge because of the large heterogeneity of their degrees of polymerization (DP) based on 4 monomers (epicatechin, catechin, epigallocatechin, epicatechin-3-O-gallate) thus multiplying the number of oxidation products.

Read More

Wine as cultural national heritage: 10 years of the “Vino Bebida Nacional” law in Argentina: review and lessons

Ten years have passed since the enactment and implementation of law no. 26,870 “national drink wine” in Argentina, a pioneering legislation worldwide that seeks to disseminate the cultural characteristics inherent in the production, elaboration, and consumption of wine, as well as its deep-rooted traditions.

Read More

Implementation of a deep learning-based approach for detecting and localising automatically grapevine leaves with downy mildew symptoms

Grapevine downy mildew is a disease of foliage caused by Oomycete Plasmopara viticola an endoparasite that develops inside grapevine organs and can infect virtually every green organ. Downy mildew is one of the most destructive diseases in wine-growing regions, drastically reducing yield and fruit quality. Traditional manual disease detection relies on farm experts. Human field scouting has been widely used for monitoring the disease progress, however, is costly, laborious, subjective, and often imprecise.

Read More

Caractérisation et gestion de la maturation par terroir en Champagne

Pour prévoir et gérer chaque année les principales caractéristiques de la maturation en Champagne, le CIVC (Comité Interprofessionnel du Vin de Champagne) a développé un ensemble de moyens de prévision et d’information très performants qui permettent aux différents acteurs de la filière viti-vinicole de prendre en compte ces informations à l’échelle de chaque terroir communal pour la recherche d’une qualité optimale.

Read More