terclim by ICS banner
IVES 9 IVES Conference Series 9 International Congress on Grapevine and Wine Sciences 9 2ICGWS-2023 9 Grapevine adaptation to drought and resistance to Neofusicoccum parvum, causal agent of Botryosphaeria dieback

Grapevine adaptation to drought and resistance to Neofusicoccum parvum, causal agent of Botryosphaeria dieback

Abstract

The sustainability of viticulture in response to climate change has been addressed mainly considering agronomic impacts, such as water management and diseases, either separately or together.

In grapevines, there is strong evidence that different genotypes respond differently to biotic and abiotic stresses. A screening was conducted on various local cultivars in response to drought and Neofusicoum parvum infection aiming to evaluate their susceptibility to abiotic stress and resistance to fungal diseases.

To characterize the varieties’ drought effect, physiological parameters were measured on 12 potted plants of each variety. Relative water content (RWC), leaf water potential (ѰMD) and gas exchange parameters were measured at midday once the plants reached severe water stress levels, i.e. stomatal conductance (gs) between 0,05 and 0,15 mol H2O m-2 s-1.

Moreover, aiming to test the resistance of each variety to the pathogen N. parvum, agar and mycelium disks of 6 mm were placed in a marked wound between the two lower nodes of each plant, using sterile agar disks as controls. Six plants per variety were used as controls and the other 6 were inoculated with N. parvum. Four months after inoculation, the plants were evaluated by measuring the development of internal lesions produced by the fungus.

Under well-watered (WW) conditions, fungal infection provoked a strong reduction in gs and, consequently, an increase in intrinsic water use efficiency (WUEi, AN/gs) in infected plants compared with non-infected plants in all cultivars. However, no other parameters were affected by the fungus. Under water stress (WS) conditions, infection with N. parvum caused similar or even higher gs values in infected than in non-infected plants, thus obtaining similar WUE values for both treatments.

This study may indicate that plants may adjust their physiology to counteract the fungal infection by maintaining a tight stomatal control and by sustaining a balanced carbon change.

DOI:

Publication date: October 11, 2023

Issue: ICGWS 2023

Type: Poster

Authors

David Labarga, Andreu Mairata, Miguel Puelles, David Gramaje, Alicia Pou*

Instituto de Ciencias de la Vid y del Vino (CSIC, Gobierno de la Rioja, Universidad de La Rioja), 26006 Logroño, Spain

Contact the author*

Keywords

grapevine trunk disease, water use efficiency, local cultivars

Tags

2ICGWS | ICGWS | ICGWS 2023 | IVES Conference Series

Citation

Related articles…

Metabolomic profiling of botrytized grape berries: unravelling the dynamic chemical transformations during noble rot

Botrytis cinerea, a fungal pathogen commonly known as grey mold, which under specific climatic conditions can develop into a desirable form known as noble rot. In this process the fungus penetrates the grape skin, allowing water evaporation and concentration of sugars and flavors, while profoundly affects the metabolite composition of grapes, leading to the production of unique and desirable compounds in the resulting wines. The result is a unique and complex wine with a luscious sweetness, heightened aromatics, and a distinct character.
Read More

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.

Read More

Assessing the Effectiveness of Electrodialysis in Controlling Brettanomyces Growth in Wine

Brettanomyces yeast can negatively impact the quality and stability of wines, posing a significant challenge to winemakers. [1] This study aims to develop novel management practices to limit Brettanomyces impact on wines by evaluating the effectiveness of electrodialysis (ED) technology in removing magnesium (Mg2+) from wine to prevent the development of Brettanomyces yeast. The ED technique utilizes charged membranes to extract ions from the wine, and it is considered an alternative to cold stabilization that requires less energy. [2]

Read More

Limiting magnesium availability: a novel approach to managing brettanomyces spoilage in winemaking

Brettanomyces is a world-renowned yeast that negatively impacts the chemical composition of wines through the production of metabolites that negatively impact the sensory properties of the final product. Its resilience in wine conditions and ability to produce off-flavors make it a challenge for winemakers. Currently, the primary control technique involves adding sulfur dioxide (SO2); however, some Brettanomyces strains are developing resistance to this preservative agent. [1] Therefore, new management strategies are necessary to control this spoilage yeast.

Read More

Indicators of Sustainable Vineyard Soil Management: Metrics for Assessing Environmental Impacts

The vital role of soils in supporting life on our planet cannot be overstated. Soils provide numerous ecosystem services and functions, including biomass production, carbon sequestration, physical support, biological habitat, and genetic reserve, among others. Understanding the characteristics and sensitivity of soils in a specific terroir, along with effective soil management practices, is crucial for the sustainable management of natural resources.

Read More