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…

Analyses of a long-term soil temperature record for the prediction of climate change induced soil carbon changes and greenhouse gas emissions in vineyards

The evaluation of the current and future impact of climate change on viticulture requires an integrated view on a complex interacting system within the soil-plant-atmospheric continuum under continuous change. Aside of the globally observed increase in temperature in almost all viticulture regions for at least four decades, we observe several clear trends at the regional level in the ratio of precipitation to potential evapotranspiration. Additionally the recently published 6th assessment report of the ipcc (the physical science basis) shows case-dependent further expected shifts in climate patterns which will have substantial impacts on the way we will conduct viticulture in the decades to come.

Read More

Sensory evolution of minerality in Chasselas wines

The term ‘minerality’ is one which is still widely employed to describe wines. Mineral wines have sensory characteristics such as gunflint aromas, sometimes extending to reduction odours.

Read More

Phenological characterization of a wide range of Vitis Vinifera varieties

In order to study the impact of climate change on Bordeaux grape varieties and to assess the adaptation capacities of candidates to the grape varieties of this wine region to the new climatic conditions, an experimental block design composed of 52 grape varieties was set up in 2009 at the INRAE Bordeaux Aquitaine center. Among the many parameters studied, the three main phenological stages of the vine (budburst, flowering and veraison) have been closely monitored since 2012. Observations for each year, stage and variety were carried out on four independent replicates. Precocity indices have been calculated from the data obtained over the 2012-2021 period (Barbeau et al. 1998). This work allowed to group the phenological behaviour of the grapevine varieties, not only based on the timing of the subsequent developmental stages, but also on the overall precocity of the cycle and the total length of the cycle between budburst and veraison. Results regarding the variability observed among the different grape varieties for these phenological stages are presented as heat maps.

Read More

High density balsamic vinegar: application of stable isotope ratio analysis to determine watering down.

Aceto balsamico di Modena IGP (ABM) is an Italian worldwide appreciated PGI (Protected Geographical Indication) vinegar,  obtained from cooked and/or concentrated grape must (at least 20% of the volume), with the addition of at least 10% of wine vinegar and a maximum 2% of caramel for color stability (EU Reg. 583/ 2009).

Read More

Local adaptation tools to ensure the viticultural sustainability in a changing climate

[lwp_divi_breadcrumbs home_text="IVES" use_before_icon="on" before_icon="||divi||400" module_id="publication-ariane" _builder_version="4.19.4" _module_preset="default" module_text_align="center" module_font_size="16px" text_orientation="center"...
Read More