terclim by ICS banner
IVES 9 IVES Conference Series 9 Grapevine xylem embolism resistance spectrum reveals which varieties have a lower mortality risk in a future dry climate

Grapevine xylem embolism resistance spectrum reveals which varieties have a lower mortality risk in a future dry climate

Abstract

Wine-growing regions have recently faced intense and frequent droughts that have led to substantial economical losses, and the maintenance of grapevine productivity under warmer and drier climates will rely notably on planting drought-resistant cultivars. Given that plant growth and yield depend on water transport efficiency and maintenance of photosynthesis, thus on the preservation of the vascular system integrity during drought, a better understanding of drought-related hydraulic traits that have a significant impact on physiological processes is urgently needed. We have worked towards this end by assessing vulnerability to xylem embolism in 30 grapevine commercial varieties encompassing red and white Vitis vinifera varieties, hybrid varieties characterized by a polygenic resistance for powdery and downy mildew, and commonly used rootstocks. These analyses further allowed a global assessment of wine regions with respect to their varietal diversity and resulting vulnerability to stem embolism. Hybrid cultivars displayed the highest vulnerability to embolism, while rootstocks showed the greatest resistance. Significant variability also arose among Vitis vinifera varieties, with Ψ12 and Ψ50 values ranging from -0.4 to -2.7 MPa and from -1.8 to -3.4 MPa, respectively. Cabernet franc, Chardonnay and Ugni blanc featured among the most vulnerable varieties while Pinot noir, Merlot and Cabernet Sauvignon ranked among the most resistant. In consequence, wine regions bearing a significant proportion of vulnerable varieties, such as Poitou-Charentes, France and Marlborough, New Zealand, turned out to be at greater risk under drought. These results highlight that grapevine varieties may not respond equally to warmer and drier conditions, outlining the importance to consider hydraulic traits associated with plant drought tolerance into breeding programmes and modeling simulations of grapevine yield maintenance under severe drought. They finally represent a step forward to advise the wine industry about which varieties and regions would have the lowest risk of drought-induced mortality under climate change.

DOI:

Publication date: May 31, 2022

Issue: Terclim 2022

Type: Article

Authors

Laurent J. Lamarque1,2, Chloé E.L. Delmas3, Guillaume Charrier4, Régis Burlett1, Ninon Dell’acqua3, Jérôme Pouzoulet5, Gregory A. Gambetta5 and Sylvain Delzon1

1Université de Bordeaux, INRAE, BIOGECO, Pessac, France
2Département des Sciences de l’Environnement, Université du Québec, Trois-Rivières, Québec, Canada
3SAVE, INRAE, BSA, ISVV, Villenave d’Ornon, France
4INRAE, PIAF, Université Clermont Auvergne, Clermont-Ferrand, France
5EGFV, Univ. Bordeaux, Bordeaux-Sciences Agro, INRAE, ISVV, Villenave d’Ornon, France

Contact the author

Keywords

drought, Vitis, hydraulics, P50, regions at risk, ontogeny

Tags

IVES Conference Series | Terclim 2022

Citation

Related articles…

Setting up new tools to reduce the duration of the grapevine breeding process : Mercier experience

Since some years, the French wine sector faces strategical challenges, all linked to climate change. Multiple issues have been observed like diseases development, early frost, drought, change in the precocity and maturity of grapes, each one resulting in loss of productivity and yield. In France, the varieties proposed today by nurseries are historical varieties that are not well adapted to those changes. Therefore, Mercier Frères, one of the leading grapevine nursery, has decided to start its own research programs, with the help of its laboratory Novatech, to answer the growing demand for new grapevine varieties.

Detoxification capacities of heavy metals and pesticides by yeasts 

Winegrowing is still characterized by the extensive use of chemical fertilizers and plant protection products, despite strong recommendations to limit these practices. A part of these xenobiotics and metals are then found in grape juice and wine, causing a major health concern, as well as negatively affecting the fermentation process. In recent years, there has been renewed interest in non-Saccharomyces yeasts. These species have a wide phenotypic diversity, which would be exploited to broaden the aromatic palette of wines.

Characterization of winegrape berries’ composition on sorting tables using hyperspectral imaging and AI

Comprehensive evaluation of grape composition at winery receiving areas often requires multiple measurements to ensure representativeness, as well as the use of analytical techniques that are time-consuming and involve sample preparation.

Regenerative agricultural approaches to improve ecosystem services in Mediterranean vineyards

REVINE is a 3 year European projected funded by PRIMA programme which proposes the adoption of regenerative agriculture practices with an innovative and original perspective, in order to improve the resilience of vineyards to climate change in the Mediterranean area. The potential for innovation lies in developing and combining new approaches that make agriculture more environmentally sustainable and enable a circular economy capable of improving farmers’ incomes. Primarily REVINE aims to improve soil health and biodiversity by promoting the multiplication of soil saprophytic microorganisms and the presence of useful microorganisms linked to the life cycle of the plant, such as rhizobacteria (PGPR) and fungi (PGPF) that promote plant growth which, in addition to increasing plant performance, increase tolerance to biotic and abiotic stresses.

Vacuum distillation of Muscaris pomace: temperature effects on aroma composition

The consumption of wine in traditional wine-producing countries like Italy, Spain, and France is decreasing.