terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Unraveling the complexity of high-temperature tolerance by characterizing key players of heat stress response in grapevine

Unraveling the complexity of high-temperature tolerance by characterizing key players of heat stress response in grapevine

Abstract

Grapevine (Vitis spp.) is greatly influenced by climatic conditions and its economic value is therefore directly linked to environmental factors. Among these factors, temperature plays a critical role in vine phenology and fruit composition. In such conditions, elucidating the mechanisms employed by the vine to cope with heat waves becomes urgent. For the past few years, our research team has been producing molecular and metabolic data to highlight the molecular players involved in the response of the vine and the fruit to high temperatures [1]. Some of these temperature-sensitive genes are currently undergoing characterization using transgenesis approaches coupled or not with genome editing, taking advantage of the Microvine genotype [2]. The expected results will allow us to enhance our understanding of the molecular mechanisms underlying grapevine’s response to heat stress and to identify biomarkers associated with temperature resilience. Furthermore, in the long term, these findings may facilitate the development of grapevine cultivars that are better adapted to the future climate.

Acknowledgements: This project and C.P. PhD thesis are supported by the French National Research Agency (ANR) (PARASOL Project, ANR-20-CE21-0003).

References:

1- Lecourieux, F et al. (2017). Dissecting the Biochemical and Transcriptomic Effects of a Locally Applied Heat Treatment on Developing Cabernet Sauvignon Grape Berries. Frontiers in Plant Science, 8. https://doi.org/10.3389/fpls.2017.00053
2- Torregrosa, L et al. (2019). The microvine, a model for studies in grapevine physiology and genetics. OENO One, 53(3). https://doi.org/10.20870/oeno-one.2019.53.3.2409

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Cécile Prévot 1, David Lecourieux1 and Fatma Ouaked-Lecourieux1

1UMR 1287 Ecophysiologie et Génomique Fonctionnelle de la Vigne, ISVV Bordeaux-Aquitaine, 210 Chemin de Leysotte, 33140 Villenave-d’Ornon, France

Contact the author*

Keywords

grapevine, heat stress, functional genomic, climate change

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Identification of a stable epi-allele associated with flower development and low bunch compactness in a somatic variant of Tempranillo Tinto

Grapevine cultivars are vegetatively propagated to preserve their varietal characteristics. However, spontaneous somatic variations that occur and are maintained during cycles of vegetative growth offer opportunities for the natural improvement of traditional grape cultivars. One advantageous trait for winegrowing is reduced bunch compactness, which decreases the susceptibility to pests and fungal diseases and favor an even berry ripening.

Read More

Pre-breeding for developing heat stress resilient grape varieties to ensure yield 

Climate change has numerous detrimental consequences and creates new challenges for viticulture around the world. Transitory or constant high temperatures frequently associated with an excess of sunlight (UV) can cause a variety of physiological disorders, such as sunburn. Diverse environmental factors and the plant’s response mechanisms to stress determine the symptoms. Grapevine berry sunburn leads to a drastic reduction in yield, and may eventually decline berry quality. Consequently, this poses a significant risk to the winegrowers.

Read More

Antimicrobial activity of oenological polyphenols against Gram positive and Gram negative intestinal multidrug-resistant bacteria

Bacterial antibiotic resistance is a major current health problem. Polyphenols have demonstrated antibacterial activity, and in this work we studied the effect of oenological polyphenols on the growth of intestinal multidrug-resistant strains of human and animal origin. Two Enterococcus faecium strains, resistant to vancomycin and other antibiotics, and four Escherichia coli strains, resistant to ampicillin and other antibiotics, were included in this study. All strains showed multidrug resistant phenotypes and genotypes to at least two antibiotic families.

Read More

Wine racking in the winery and the use of inerting gases

The O2 uptake in the different winemaking processes is generally considered to be negative for the sensory characteristics of white and rosé wines. Wine racking is a critical point of O2 uptake, as the large surface area of the wine exposed during this operation and the inability to maintain an effective inert gas blanket over it.
The objective was to study O2 uptake during the racking of a model wine without using inert gases and to compare it with the purging of the destination tank with different inert gases.

Read More

Sparkling wines and atypical aging: investigating the risk of refermentation

Sparkling wine (SW) production entails a two-steps process where grape must undergoes a primary fermentation to produce a base wine (BW) which is then refermented to become a SW. This process allows for the development of a new physicochemical profile characterized by the presence of foam and a different organoleptic profile.

Read More