Characterization of the mode of action of a biocontrol product through the pathosystem Tomato Micro-tom and Phytophthora infestans - Normandie Université Accéder directement au contenu
Poster De Conférence Année : 2023

Characterization of the mode of action of a biocontrol product through the pathosystem Tomato Micro-tom and Phytophthora infestans

Résumé

The tomato is the most consumed fruit in France and in the world. Among the different diseases affecting tomatoes and potatoes, the late blight caused by the oomycete, Phytophthora infestans, is one of the most devastating pathogens. The oomycete causes significant yield losses, involving the repeated use of phytopharmaceutical products harmful to the environment and public health. In order to reduce the use of pesticides, the use of biocontrol agents is one of the possible alternatives for crop protection. In this context, my research project aims to characterize the mode of action of a biocontrol product (GA342) developed by the company Gaïago in order to improve its effectiveness against the late blight, using the pathosystem Phytophthora infestans (A36_A2 strain) - Micro-Tom, model cultivar for tomato. Preliminary results showed that 1) GA342 had a direct effect on the oomycete, decelerating or inhibiting totally the mycelial growth, in a dose dependent manner; 2) in planta, the treatment with GA342, prior to the infection, showed to reduced significantly the symptoms. The results of further studies will be presented on the direct effect of GA342 and more particularly on sporangia, zoospores and mycelia. In addition, targeted transcriptomic and biochemistry approaches in planta will be shown. The promising results related to the action mode of GA342 will allow us to optimize the efficiency of the product for field application
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Dates et versions

hal-04561047 , version 1 (26-04-2024)

Identifiants

  • HAL Id : hal-04561047 , version 1

Citer

Valentin Penaud, Abdelrahman Alahmad, Aude Bernadon-Mery, Karine Laval, Adrien Gauthier. Characterization of the mode of action of a biocontrol product through the pathosystem Tomato Micro-tom and Phytophthora infestans. 12th INTERNATIONAL CONGRESS OF PLANT PATHOLOGY, Aug 2023, Lyon, France. ⟨hal-04561047⟩
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