Fig. 2.

PR-1 expression in SA signalling mutants. The relative expression level of PR-1 (At2g14610) was analysed by quantitative PCR. Leaves from Col-0, nudt7-1, and eds1-2 (A), Col-0, sid2-1, and npr1-1 (B), and Col-0 and the tga2356 quadruple mutant (C) were treated with 2 µl of P. brassicae egg extract for 24, 48, and 72h before RNA extraction. Expression levels were normalized with respect to the housekeeping gene EIF4A. Data bars represent the mean (±SE) of three technical repeats. Each experiment was repeated once with similar results.