Biologically induced systemic acquired resistance in Arabidopsis thaliana

Summary Local infection with a necrotizing pathogen can render plants resistant to subsequent infection by normally virulent pathogens. A system for biological induction of such systemic acquired resistance (SAR) in Arabidopsis thaliana is reported. When plants were immunized by local inoculation of a single leaf with avirulent Pseudomonas syringae pv. tomato (Pst) carrying the avrRpt2 avirulence gene, after 2 days other leaves became …