terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Effect of drought on grapevine wood fungal pathogen communities using a metatranscriptomics approach

Effect of drought on grapevine wood fungal pathogen communities using a metatranscriptomics approach

Abstract

Crops are facing increasing biotic and abiotic stress pressures due to global changes. However, trade-off mechanisms between these stresses and the underlying physiological processes are still poorly understood, especially in perennial crop species. To better understand these trade-offs, we studied the effect of drought on grapevine (Vitis vinifera) physiology and esca-related wood fungal communities. Esca is a vascular disease caused by a community of wood-infecting pathogenic fungi, and characterized by trunk necrosis, leaf scorch symptoms, yield losses, and mortality. This grapevine disease lead to xylem hydraulic failure and leaf symptoms are inhibited by severe drought. To characterize the molecular processes underlying the interactions between drought and esca, we conducted two experiments on 30-year-old Sauvignon blanc vines, expressing or not esca leaf symptoms, and subjected or not to drought stress under controlled conditions. Sapwood samples from the trunks were used to perform community-level transcriptomics analyses. Results will be also analyzed in the light of others metabolomics and ecophysiological data acquired on wood and leaf samples. Such an integrative approach will provide new insights into the understanding of grapevine/esca pathosystem under drought conditions, in terms of physiological and functional responses in either host and pathogens.

Acknowledgements: The authors thanks Université de Bordeaux for funding the GPR (Great Research Project) Bordeaux Plant Science.

DOI:

Publication date: October 6, 2023

Issue: ICGWS 2023

Type: Poster

Authors

Marie Chambard1,2, Ninon Dell’Acqua1, Giovanni Bortolami1, Dario Cantù3, Nathalie Ferrer1, Gregory A. Gambetta4, Marie Foulongne-Oriol2, Chloé E. L. Delmas1

1 INRAE Bordeaux Nouvelle Aquitaine, UMR 1065 SAVE, 71 avenue Edouard Bourlaux – CS 20032, 33882 Villenave d’Ornon cedex
2 INRAE Bordeaux Nouvelle Aquitaine, UR 1264 MycSA, 71 avenue Edouard Bourlaux – CS 20032, 33882 Villenave d’Ornon cedex

3 Department of Viticulture and Enology, University of California, Davis, One Shields Ave, Davis, CA 95618, USA
4 INRAE Bordeaux Nouvelle Aquitaine, UMR 1287 EGFV, 71 avenue Edouard Bourlaux – CS 20032, 33882 Villenave d’Ornon cedex

Contact the author*

Keywords

Vitis vinifera Sauvignon Blanc, esca disease, drought, metatranscriptomics, physiology

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

The colour pattern of flower arrangements influence wine tasters’ sensory description

The arrangements of flowers and wine counterparts are inextricably linked. Whether a fundamental aspect of tablescaping or acolytes to broader entertainment rituals, they have an entangled history since ancient times. The aim of this contribution is to verify the influence of visually delicate and robust flower arrangements on individual description of wines. Changes in the sensory description of wines were investigated during subjects’ (thirty-two participants) exposure to three different conditions: the presence of delicate, robust, or totally absent flower arrangements.

Molecularly imprinted polymers: an innovative strategy for harvesting polyphenoles from grape seed extracts

Multiple sclerosis (MS) is a multifactorial autoimmune disease associating demyelination and axonal degeneration developing in young adults and affecting 2–3 million people worldwide. Plant polyphenols endowed with many therapeutic benefits associated with anti-inflammatory and antioxidant properties represent highly interesting new potential therapeutic strategies. We recently showed the safety and high efficiency of grape seed extract (GSE), a complex mixture of polyphenolics compounds comprising notably flavonoids and proanthocyanidins, in an experimental autoimmune encephalomyelitis (EAE) mouse model of MS.

Climate change and viticulture in Nordic Countries and the Helsinki area

The first vineyards in Northern Europe were in Denmark in the 15th century, in the southern parts of Sweden and Finland in the 18th century at 55–60 degrees latitude. The grapes grown there have not been made into wine, but the grapes have been eaten at festive tables. The resurgence of viticulture has started with global warming, and currently the total area of viticulture in the Nordic countries, including Norway, is estimated to be 400–500 hectares, most of which is in Denmark. Southern Finland, like all southern parts of Northern Europe, belongs to the cool-cold winegrowing area.

Glucosidase and esterase salivary activities and their involvement in consumer’s wine sensory perception and liking

Wine flavour is the integration of distinct physiologically defined sensory systems that combine taste, aroma and trigeminal sensations, and it is a key determinant factor for the acceptance of wine by consumers. Volatile compounds, are important contributors to wine flavour, specially to aroma. These small and low-boiling point compounds are easily released into the air allowing to enter and move within the nasal or oral cavities where they can bind the olfactory receptors. Additionally, wine also contains aroma precursors, which are non-volatile compounds, but that can be broken down releasing volatile odorants. During wine tasting, all these chemicals (volatiles and non-volatiles) can be submitted to the action of salivary enzymes.

Organic mulches slightly influence wine phenolic composition and sensorial properties

Grapevines have traditionally been grown in semi-arid areas, but viticulture is now compromised by climate change. Therefore, it is necessary to implement environmentally friendly viticulture practices to adapt grapevines to current climatic conditions. In this context, organic mulches offer many benefits, such as reduced soil erosion and increased organic matter, soil water content and crop productivity. However, these practices must not compromise grape and wine quality. Therefore, the objective of this study was to evaluate the effect on wine physicochemical and phenolic composition and sensorial properties of different soil management practices on the vine row. Over four years, five soil treatments were examined in two different vineyards.