Taking Advantage of Pathogen Diversity and Immune Priming to Minimize Disease Prevalence in Host Mixtures: A Model

• DOI: 10.1094/phyto-09-20-0429-r
• Publication Date: 2020-12-10T03:38:02Z
• Authors: Pauline Clin; Frédéric Grognard; Ludovic Mailleret; Florence Val; Didier Andrivon; Frédéric M. Hamelin
• Keywords: Priming (agriculture); Host–pathogen interaction; Plant Immunity

Host mixtures are a promising method for agroecological plant disease control. Plant immunity is key to the success of host against polymorphic pathogen populations. This results from priming-induced cross-protection, whereby plants able resist infection by specific genotypes become more resistant other genotypes. Strikingly, this phenomenon was absent mathematical models aiming at designing mixtures. We developed model specifically explore how priming affects coexistence two in composed and it prevalence. The main effect reduce region parameter space (due cross-protection) generate singular mixture susceptible hosts corresponding maximal reduction prevalence (in absence priming, pure stand optimal). epidemiological advantage over thus appears as direct consequence immune priming. also showed that there indirect cross-protection between mixture. Moreover, optimal mix prevents emergence resistance-breaking genotype. Our highlight importance considering design sustainable