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Grapevine and Fungal Trunk Pathogens Interactions and the Global Impacts of Climatic Events

Florence Fontaine: Université de Reims Champagne Ardenne

<div>Grapevine trunk diseases (GTDs) represent one of the most important problems for viticulture worldwide. Characterizing the impact of GTDs on grapevine physiology is a key step to understanding the mechanisms that lead to disease development and symptoms expression, which will assist in the development of effective control strategies against GTDs. For GTD-affected vines, carbon metabolism seems to be strongly altered associated with an induction of stress/defence responses. Detoxification processes are also affected; which could be linked to the production of extracellular compounds by GTD pathogens some of which are phytotoxic. These processes tend to strengthen the plant cell wall, maintain the osmotic and redox balance, destroy the fungal cell walls and battle against fungi. The production of phytotoxins by GTD pathogens is modulated by environmental factors such as temperature and water stress and depends on the fungal strains and the vine cultivar and rootstock. In addition to the strong relationship between the grapevine and the GTD pathogens, the microbiota, including both beneficial and pathogen microorganisms needs to be taken into consideration. The balance and the diversity of the microbiota could interfere in the virulence of fungi and vine physiology. All these relationships still remain unclear and need to be deciphered to better understand the emergence of the GTD foliar symptoms.</p> <p><sub> </sub></p> <p>Referees contacted<br /="/">Cecilia Rego, Institute superior of agronomy, Lisbon, Portugal<br /="/">Rosé Ramon Urbez-Torres, Summerland Research and Development Centre, Agriculture and Agri-food Canada<br /="/">Josep Armengol, Institute Agroforestry Mediterranea, University of Valencia, Spain</div>