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…

Quelles cibles moléculaires pourraient expliquer l’effet du terroir sur la composition des baies en sucres et acides?

Le manque de connaissances concernant la physiologie de la maturation du raisin a longtemps interdit d’interpréter l’effet du terroir ou du millésime sur la qualité des vendanges en termes moléculaires. L’hypothèse selon laquelle c’est la perméabilité membranaire qui contrôlerait le sens comme l’intensité du stockage des acides est pourtant déjà ancienne (1). L’étude du transport des acides organiques et de son coût énergétique permet d’avancer certaines hypothèses concemant les sites potentiels de la régulation du contenu en sucres et acides du raisin sous l’effet de paramètres environnementaux.

Read More

Predicting provenance and grapevine cultivar implementing machine learning on vineyard soil microbiome data: implications in grapevine breeding

The plant rhizosphere microbial communities are an essential component of plant microbiota, which is crucial for sustaining the production of healthy crops. The main drivers of the composition of such communities are the growing environment and the planted genotype. Recent viticulture studies focus on understanding the effects of these factors on soil microbial composition since microbial biodiversity is an important determinant of plant phenotype, and of wine’s organoleptic properties. Microbial biodiversity of different wine regions, for instance, is an important determinant of wine terroir.

Read More

Narrow terraces and alternative training systems for steep sloop viticulture – Douro region

In Douro Region, vineyards are usually planted on hillsides with steep sloops. The models currently used for planting those vineyards are, depending on the initial slope of the hillside, vertical planting or terraces.

Read More

Exploring the resistance of non-Saccharomyces wine yeasts to dehydration-rehydration processes

AIM: The use of non-Saccharomyces (NS) yeasts in multi-starter fermentations with S. cerevisiae is a trend in the wine industry, but the number of strains commercially available in a powder formulation, such as active dry yeasts (ADY), is still limited.

Read More

Understanding the impact of rising temperatures due to climate change on aromatic compositions in Malbec wines from Mendoza, Argentina

Mendoza is one of Argentina’s most important and outstanding wine regions producing the renowned Malbec wines due to its optimal soil and weather conditions. However, the effects of 21st-century climate change would negatively impact Malbec wines quality. This study investigated the effect of temperature increase and the impact of plant hormone abscisic acid (ABA) used to mitigate the negative effect of temperature increase on Malbec wines aromatic composition through GC-MS. Four treatments were applied on vines at field condition: Control, Control + 3 ºC, ABA and ABA + 3 ºC.

Read More