As indicated in Figure 3A, 2 days after pathogen infection, B. cinerea caused visible disease symptom on both wild type (Col-0) and sid2-2, NahG, jar1, ein2, npr1 mutant plants, indicating none of the mutant plants exhibited an automatic and effective immune response against B. cinerea infection (Figure 3A, control set). The gene discussed is NPR1; the disease is infection.