NPR1 and infection: The disease spot lengths of 10 A. thaliana plants were counted; the CAMTA-deficient mutant had significantly shorter spot lengths than the wild type, as shown in Figure 7B. CAMTA has been reported to negatively regulate NPR1-mediated immune response [49], so we collected A. thaliana at different infection stages of F. graminearum to determine the expression levels of NPR1-1, NPR1-3 and NPR1-4.