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IVES 9 IVES Conference Series 9 GiESCO 9 GiESCO 2015 9 GiESCO 2015 – Session 1: Ecophysiology, water, irrigation 9 Cold-response in grapevine inflorescences: comparison of two cultivars with contrasted resistance to coulure

Cold-response in grapevine inflorescences: comparison of two cultivars with contrasted resistance to coulure

Abstract

Grapevine flowers development and fruit set are both influenced by cold nights in the vineyard. In this study, impact of chilling temperatures (0°C overnight) on carbon metabolism was investigated in the inflorescences of two cultivars, Pinot noir (PN) and Gewurztraminer (GW), selected according to their distinct sensitivity to the “coulure” process, GW being the most sensitive. Fluctuations in photosynthetic activity and carbohydrate metabolism by analyzing gas exchanges, carbohydrate content, simultaneous activities of photosystem I and II, activities of several enzymes involved in carbohydrate metabolism and the expression of related genes were monitored. In addition, metabolomic analysis, presented here, was performed. Metabolomic analysis revealed that several metabolites, such as GABA, sugars and ascorbate, were changed with time, regardless of the cold treatment and cultivars. Interestingly, these results suggest that the different fluctuations observed in inflorescence activities, as response to chilled night, were due to different regulations processes. These findings suggest that inflorescences of both cultivars were differently impacted by cold, revealing that these organs are more vulnerable in GW.

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Publication date: 07/09/2026

Issue: GiESCO 2015

Type: Extended abstract

Authors

Mélodie Sawicki1, Essaïd Ait Barka1, Christophe Clément1, Françoise Gilard2, Guillaume Georges Tcherkez2, Fabienne Baillieul1, Cédric Jacquard1, Nathalie Vaillant-Gaveau1,*

1 Unité de Recherche Vignes et Vins de Champagne, EA 4707, F-51687 REIMS, France

2 Institut de Biologie des Plantes, UMR 8618, Plateau du Moulon, F-91190 GIF SUR YVETTE, France

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Keywords

carbon metabolism, cold night, coulure, inflorescences, photosynthetic activity

Tags

GiESCO | GiESCO 2015 | IVES Conference Series

Citation

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