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Communication Dans Un Congrès Année : 2023

SEAWINES: Use of macroalgae as biostimulants against fungal diseases in grapevines

Iratxe Zarraonaindia
  • Fonction : Auteur
Emma Cantos-Villar
  • Fonction : Auteur
Ana Diez
  • Fonction : Auteur
Amaia Mena-Petite
  • Fonction : Auteur
Eva Perez-Alvarez
  • Fonction : Auteur
Enrico Cretazzo
  • Fonction : Auteur
Nadia Bertazzon
  • Fonction : Auteur
Maite Lacuesta
  • Fonction : Auteur
Belén Puertas
  • Fonction : Auteur
Usue Perez-Lopez
  • Fonction : Auteur
Ismael Hachero-Cruzado
  • Fonction : Auteur
Juan José Cordoba-Granados
  • Fonction : Auteur

Résumé

The outlook for climate change foresees major impacts on vineyards worldwide, shifting pathogens distribution and dynamics demanding more intense plant protection measures in certain regions, increasing viticulture's dependence on phytochemicals and pesticides. However, the European Commission is applying restrictions on their use, encouraging the development of more sustainable strategies efficient for disease control. Seaweeds represent an ecological alternative for a more sustainable production. Previous studies have shown that algae extracts contain compounds capable of reducing the abundance of plant fungal pathogens. Despite it, little is known about the molecular mechanism underlying this response. SEAWINES project is evaluating the efficacy of the foliar application of Ulva ohnoi and Rugulopteryx okamurae extracts to control powdery and downy mildew, in addition to testing their effect on grape and wine quality. To our knowledge, this is the first study evaluating R. okamurae biostimulant capacity and fungicidal effect in viticulture. This macroalgae is relevant since it is an invasive species in our coasts, causing incalculable economic and environmental burdens. We aim to 1- Reduce the usage of chemicals in grapevines; 2- Reduce fungal diseases in viticulture; 3- Valorize polysaccharides from seaweeds; 4- Increase the added-value to wines (ecological and quality); and 5- Provide an alternative use to seaweed biomass, contributing to bio-circular economy and reducing its accumulation in our coasts.
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hal-04501727 , version 1 (12-03-2024)

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Iratxe Zarraonaindia, Emma Cantos-Villar, Ana Diez, Amaia Mena-Petite, Eva Perez-Alvarez, et al.. SEAWINES: Use of macroalgae as biostimulants against fungal diseases in grapevines. 44th World Congress of Vine and Wine, Jun 2023, Jerez de la Frontera, Spain. ⟨10.1051/bioconf/20236801005⟩. ⟨hal-04501727⟩

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