Figure 1.

Suppression of the edr1 resistance phenotype by mutations that block SA-mediated defense responses. Double mutants containing edr1 and the indicated mutations were constructed by standard genetic crosses. Plants were inoculated with E. cichoracearum and disease phenotypes scored 8 days after inoculation. Single representative leaves were removed from intact plants on the eighth day for photography. In the wild-type and double mutant plants, except for ein2/edr1, abundant asexual sporulation is observed as white patches. Also note the absence of yellow/brown necrotic patches observed in the edr1 mutant leaf.