To determine whether Arabidopsis develops TAR in response to necrotrophic pathogens, we tested F1 progeny from parents exposed to increasing disease by the necrotrophic fungus Pc for resistance against the same pathogen. Compared to progeny from mock-inoculated parents, all but the lowest severity of parental disease resulted in a statistically significant suppression of Pc lesion development in F1 progeny (Fig. 4a and Fig. S3a).