Study of the stress-related signalling of endoplasmic reticulum in grapevine immunity associated to LysM receptor kinases (VvLYKs)

In the actual situation of decreasing the use of chemicals in agriculture, enhancing our understanding of plant immunity is a critical task to develop more sustainable plant health protection methods. An interesting strategy is to study how plants, and in particular grapevine, perceives and responds to different microorganisms. Microorganisms are notably recognizedby LysM Receptor-like Kinase (LYKs) and previous works have identified 16 LYKs encoded by the grapevine genome (VvLYKs) (Roudaire et al. 2023). Among them, VvLYK1-1, VvLYK1-2 and VvLYK5-1 are involved in chitin perception and thus play a role in the plant immunity. Interestingly, immune responses are also involved during symbiotic…

The grapevine LysM receptor-like kinase VvLYK5-1 mediates chitin-triggered immunity

The establishment of defense reactions to protect plants against invading pathogens first requiresthe recognition of Microbe-Associated Molecular Patterns (MAMPs), detected by plasmamembrane-bound Pattern Recognition Receptors (PRRs). These MAMPs, also termed elicitors, areused in several biocontrol products that are gradually developing to reduce the use of chemicalpesticides in agriculture. Chitin, the main component of fungal cell walls, as well as its deacetylatedderivative, chitosan, are two chitooligosaccharides (COS) that can be found in some of theseproducts. Unfortunately, the mechanism allowing the perception of these molecules is still poorlyunderstood in Vitis vinifera, sometime…

Role of Lys-M Receptor Kinases in the perception of chitooligosaccharides to trigger signaling events and immune responses in grapevine (Vitis vinifera)

The establishment of defense reactions to protectplants against invading pathogens first requires therecognition of Microbe-Associated MolecularPatterns (MAMPs), detected by plasma membrane-bound Pattern Recognition Receptors (PRRs). TheseMAMPs, also termed elicitors, are used in severalbiocontrol products that are gradually developing toreduce the use of chemical pesticides inagriculture. Chitin, the main component of fungalcell walls, as well as its deacetylated derivative,chitosan, are two chitooligosaccharides (COS) thatcan be found in some of these products.Unfortunately, the mechanism allowing theperception of these molecules is still poorlyunderstood in Vitis vinifera, sometimes hamp…

Development of a chitosan-based biocontrol product against crop diseases

Recherche de récepteurs de l’immunité des plantes et étude de l’impact de biostimulants sur leur expression et la résistance induite chez des organes sensibles

National audience; La stimulation des défenses immunitaires des plantes représente une stratégie durable deprotection des cultures qui pourrait permettre de réduire l’utilisation de pesticides chimiquesencore trop répandue en viticulture. Son principe réside en l’application, au contact des cellulesvégétales, de molécules élicitrices détectées comme des signaux de danger par la plante. Cessignaux de dangers peuvent être de différente nature et origine comme par exemple la chitine,un chito-oligosaccharide (COS) retrouvé dans les parois fongiques. Leur détection par desrécepteurs de l’immunité entraine une cascade de signalisation complexe, conduisant àl’activation de réactions de défense et …