FIG. 1.

Effect of ultrashort peptide application at the root site on multiplication of P. syringae pv. lachrimans in challenged cotyledons. Cucumber seedlings were treated with 3.1 nmol of different peptides (P1 to P7) or with water (Mock) 48 h prior to bacterial challenge. CFU counts of surviving bacteria were assayed 48 h after inoculation. Seedling inoculation with the beneficial fungus T. asperellum T203 was used as a control for the induction of systemic protection (42, 48). The results shown are averages (± standard errors) of three independent experiments. *, significantly different from the control (one-way factorial ANOVA; P ≪ 0.001).