Bio-Inspired Rhamnolipids, Cyclic Lipopeptides and a Chito-Oligosaccharide Confer Protection against Wheat Powdery Mildew and Inhibit Conidia Germination
Nour El Houda Raouani,
Elodie Claverie,
Béatrice Randoux,
Ludovic Chaveriat,
Yazen Yaseen,
Bopha Yada,
Patrick Martin,
Juan Carlos Cabrera,
Philippe Jacques,
Philippe Reignault,
Maryline Magnin-Robert,
Anissa Lounès-Hadj Sahraoui
Affiliations
Nour El Houda Raouani
Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d’Opale, CEDEX CS 80699, 62228 Calais, France
Elodie Claverie
Materia Nova ASBL, Avenue du Champ de Mars 6, 7000 Mons, Belgium
Béatrice Randoux
Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d’Opale, CEDEX CS 80699, 62228 Calais, France
Fyteko, Allée de la Recherche 4, 1070 Brussels, Belgium
Philippe Jacques
JUNIA, Joint Research Unit UMRt 1158-INRAE, BioEcoAgro, Équipe Métabolites Spécialisés d’Origine Végétale, University Lille, INRAE, University Liège, UPJV, University Artois, ULCO, 48, Boulevard Vauban, CEDEX BP 41290, 59014 Lille, France
Philippe Reignault
Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d’Opale, CEDEX CS 80699, 62228 Calais, France
Maryline Magnin-Robert
Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d’Opale, CEDEX CS 80699, 62228 Calais, France
Anissa Lounès-Hadj Sahraoui
Unité de Chimie Environnementale et Interactions sur le Vivant (EA 4492), Université Littoral Côte d’Opale, CEDEX CS 80699, 62228 Calais, France
Plant protection is mainly based on the application of synthetic pesticides to limit yield losses resulting from diseases. However, the use of more eco-friendly strategies for sustainable plant protection has become a necessity that could contribute to controlling pathogens through a direct antimicrobial effect and/or an induction of plant resistance. Three different families of natural or bioinspired compounds originated from bacterial or fungal strains have been evaluated to protect wheat against powdery mildew, caused by the biotrophic Blumeria graminis f.sp. tritici (Bgt). Thus, three bio-inspired mono-rhamnolipids (smRLs), three cyclic lipopeptides (CLPs, mycosubtilin (M), fengycin (F), surfactin (S)) applied individually and in mixtures (M + F and M + F + S), as well as a chitosan oligosaccharide (COS) BioA187 were tested against Bgt, in planta and in vitro. Only the three smRLs (Rh-Eth-C12, Rh-Est-C12 and Rh-Succ-C12), the two CLP mixtures and the BioA187 led to a partial protection of wheat against Bgt. The higher inhibitor effects on the germination of Bgt spores in vitro were observed from smRLs Rh-Eth-C12 and Rh-Succ-C12, mycosubtilin and the two CLP mixtures. Taking together, these results revealed that such molecules could constitute promising tools for a more eco-friendly agriculture.