terclim by ICS banner
IVES 9 IVES Conference Series 9 Characterizing the molecular basis of the differences in aromatic precursors found in commercial clones of Vitis vinifera cv. Tannat

Characterizing the molecular basis of the differences in aromatic precursors found in commercial clones of Vitis vinifera cv. Tannat

Abstract

Uruguay is known for the production of Tannat wines, which is a neutral variety from an aroma point of view, but capable of providing aromatic precursors that are of interest in the production of wines for ageing. The main aromatic precursors present are glycosidic compounds and carotenoids. The contribution of carotenoid degradation by-products such as norisoprenoids to wine aroma is fundamental, as they are associated with pleasant aroma descriptors and very low olfactory perception thresholds. Several factors have been shown to influence carotenoid concentrations in grapes, such as cultivar, climatic conditions, viticultural region, plant water status, exposure to sunlight and ripening stage. Norisoprenoids can be formed by chemical or enzymatic degradation of carotenoids. In this work, we studied two contrasting clones from the same plot as an experimental strategy to minimize the environmental factor and focus on the genes of interest. We evaluated glycosidic precursors (SPE-GC-MS), carotenoids (HPLC-DAD) and gene expression (RNA-Seq) in the selected clones during four stages of grape ripening. Significant differences in carotenoid and norisoprenoid content were found throughout the ripening period. Comparisons between clones showed significant differences in carotenoid content but not in norisoprenoid content during this harvest. Many genes associated with carotenoid and norisoprenoid biosynthesis showed differential expression throughout the ripening period in each clone. However, no genes were differentially expressed between clones. We conclude that the differences between clones do not manifest themselves every year. This shows that climate plays a fundamental role in aroma biosynthesis in Tannat clones.

Download the abstract

DOI:

Publication date: June 14, 2024

Issue: Open GPB 2024

Type: Poster

Authors

Cecilia C. Da Silva1*, Nicolas Nieto2, Andres Coniberti3, Eduardo Boido2, Francisco Carrau2, Eduardo Dellacassa4, Laura Fariña2

1 PDU Espacio de Biología Vegetal del Noreste, sede Tacuarembó, CENUR Noreste, Universidad de la República, Tacuarembó, Uruguay
2 Área Enología y Biotecnología de Fermentaciones, CYTAL, Facultad de Química, Universidad de la República, Montevideo, Uruguay
3 Estación Experimental “Wilson Ferreira Aldunate”, Instituto Nacional de Investigación Agropecuaria, Canelones, Uruguay
4 Laboratorio de Biotecnología de Aromas, DQO, Facultad de Química, Universidad de la República, Montevideo, Uruguay

Contact the author*

Keywords

Carotenoid, Norisoprenoid, Tannat, GC-MS, RNA-Seq.

Tags

IVES Conference Series | Open GPB | Open GPB 2024

Citation

Related articles…

Vino e paesaggio: materiali per il governo del territorio vitivinicolo. Il piano regolatore delle città del vino

S’intende per Piano Regolatore delle Città del Vino la metodologia per redigere la parte strutturale dello strumento comunale di governo del territorio. Parliamo, infatti, del principale strumento comunale di governo del territorio, così come è venuto maturando nella riflessione delle Città del Vino, strumento che si misura con la sfida di governare tutto il territorio in modo coerente e sostenibile, a partire dal riconoscimento del valore del “sistema vigneto” e della sua intrinseca fragilità.

Read More

Geological history and landscape of the Coastal wine-growing region, South Africa

The geology of the Western Cape testifies to the former existence of a late Precambrian supercontinent, its fragmentation, the closure of an ocean between the South African and South American continental precursors (Kalahari and Rio de la Plata cratons), the accumulation of marine sediments and limestones, and their compression during a collision between these cratons

Read More

Under-vine cover crops as a management tool for irrigated Mediterranean vineyards: agronomic implications and changes in soil physical and biological properties 

Cover crops are increasingly considered in Mediterranean climate vineyards due to a combination of agronomic and regulatory considerations. However, the soil under the vines themselves is typically kept free of vegetation by mechanical plowing or herbicide spraying. Taking into account that these practices may convey a number of non-favourable economic and environmental implications, and the fact that drip irrigation can ease the use of cover crops under the vines, the aim of this work was to evaluate the agronomic implications and the changes in soil physical and biological properties caused by an under-vine cover crop in a Mediterranean area.

Read More

Vers la maîtrise de l’effeuillage pré-floral de la vigne

Dans le cadre de TerclimPro 2025, Thibaut Verdenal a présenté l’article IVES Technical Reviews. Retrouvez la présentation ci-dessous ainsi que l’article associé : https://ives-technicalreviews.eu/article/view/8405

Read More

Red wines from southwest France, Lebanon and South Korea: study of phenolic composition and antioxidant and biological activities according to grape varieties and winemaking processes

The phenolic compounds present in the wine are responsible for reducing the risk of developing chronic diseases (cardiovascular, cancer, diabetes, Alzheimer …) because of their antioxidant activities and the presence of nutraceutical molecules with targeted biological activities. Polyphenols not only contribute to the “French paradox” but also contribute to give the wine its color, structure, aroma and allow a long-term preservation.

Read More