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An early cellular reaction necessary for resistance expression of plant cells to pathogen attack is the migration of organelles towards the site of attempted pathogen ingress. We crossed lines expressing either Golgi bodies- or peroxisomal-targeted GFP with rar1-20, sgt1b, pad4-1 and npr1-2 mutants to test whether mutations in these signalling components impaired this cellular reaction. Defence-signalling-mutant-GFP...