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Experimental set-up for an SA/JA cross-talk mutant screen. Transgenic PDF1.2::BAR plants survive Finale® treatment when the BAR resistance gene under control of the PDF1.2 promoter is induced by MeJA, but die after combined treatment with SA, MeJA and Finale® due to SA/JA cross-talk. Conversely, a cross-talk mutant disrupted in the suppression of JA signaling by SA survives the combined treatment of SA, MeJA and Finale®.
