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…

Influence of different Lachancea thermotolerans strains in wine acidity

Wine acidity is a parameter of great importance that influences different quality factors of the product such as biological stability or organoleptic characteristics. In the current context of climate change, which gives rise to wines with higher levels of ethanol and lower acidity, the biological acidification with yeast species such as Lachancea thermotolerans could be a solution.
In this work, the effect of the inoculation of different L. thermotolerans on the acidity of wine was studied.

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. In each condition, the same two wines were blind tasted: a wine previously defined as delicate – a Pinot Noir from Australia, and a wine known for its robust character – a Tannat from Uruguay.

Characterization of a Sémillon clonal population: exploring genetic diversity, metabolomic profiles, and phenotypic variations

Sémillon is a cultivated grape variety known for contributing to dry and sweet white wine production. However, only seven approved clones have been officially recognized in France[1]. In this study, we aimed to characterize the genetic diversity and metabolomic profiles of a Sémillon clonal population, shedding light on the potential variations within this important grape variety.

How are canned wine drinkers perceived? An investigation involving Swiss nationals and different scenarios of outdoor leisure activities

This study examines how people who consume wine in cans are perceived in terms of their basic personality characteristics, helps understand the role of cultural background on people’s perception, and verify the role played by the consumption context on the perception. Our hypothesis is that prejudice and negative attitudes towards wine in cans might exert a negative effect on the evaluation of people who consume canned wine. To evaluate this hypothesis, the consumption of wine in cans was evoked in four different contexts of use during outdoor leisure activity (beach resort, ski resort, desert safari, and party). In order to examine the effect of culture on subject’s response we use participants from Switzerland, a country where three different cultures, associated with three different languages, cohabit.

REGAVID a decision tool to deficit irrigation in a temperate climate (DO Monterrei – Spain)

In temperate climates, such as in the North of Spain, the use of irrigation in the vineyard has not been required, due to the usual rainfall from June to August. In some large vineyards, irrigation management has been carried out, based on occasional support irrigation, or for the application of nutrients (fertigation). Currently it is necessary to implement decision support models to manage irrigation water in real time and avoid misuse of a scarce resource. Moreover, quality standards must be achieved, as in the previous rainfed viticulture.