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. 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.

Genetic variation among wild grapes native to Japan

Domesticated grapes are assumed to have originated in the Middle East. However, a considerable number of species are native in East Asian countries such as China, Korea and Japan as well. Evidence suggests that a total of seven species and eight varieties have been found to be native to Japan. A wide level variation in morphology, genetic and fruit composition exist in wild grape native to Japan.

A phylogenomic study reveals the major dissemination routes of ‘Tempranillo Tinto’ in the Iberian Peninsula

‘Tempranillo Tinto’ is a black-berried Iberian cultivar that originated from a hybridization between cvs. ‘Benedicto’ and ‘Albillo Mayor’ [1]. Today, it is the third most widely grown wine grape cultivar worldwide with more than 200,000 hectares of vineyards mostly distributed along the Iberian Peninsula, where it is also known as ‘Cencibel’, ‘Tinta de Toro’, ‘Tinta Roriz’, and ‘Aragonez’, among other synonyms. Here, we quantified the intra-varietal genomic diversity in this cultivar through the study of 35 clones or ancient vines from seven different Iberian wine-making regions. A comparative analysis after Illumina whole-genome sequencing revealed the presence of 1,120 clonal single nucleotide variants (SNVs).

Evaluation of the effects of pruning methodology on the development of young vines 

Grapevine pruning is one of the most important practices in the vineyards. Winegrowers use it to provide the vines the shape needed, or to maintain it once achieved, and also to balance vegetative growth and fruit production. In the last decades, careless pruning has been blamed, among other factors, as responsible of the vineyard decay that is been observed even in young vines. However, to our knowledge, there is a lack of systematic research trying to elucidate to which extent the pruning method used affects plant development or its susceptibility to grapevine trunk diseases (GTD). Within this context, the aim of this work is to study the influence of different pruning method strategies on the development of field-planted young vines.

Cover crop management and termination timing have different effects on the maturation and water potentials of Glera (Vitis vinifera L.) in Friuli-Venezia Giulia

Inter-row soil tillage in vineyards, stimulates vigor and production due to the absence of competition for water and nutrients, however negatively affects organic matter content, soil erosion, and compaction, resulting in reduced fertility. In this study, we investigated the effects of different cover crop management approaches, including cultivation type and termination timing, on the physiological and productive responses of a Glera vineyard.
The experimental trial was conducted in Precenicco (UD) from 2019 to 2021. A commercial mixture for autumn cover cropping was sown in alternating rows, and the sowing pattern was changed each year.