Figure 1. Symptom development of Pst infection in tobacco leaves after control treatment and treatment with 10 µM cZ or tZ. (A) Representative symptom development in infected tobacco leaves after indicated treatment 6 and 12 dpi. (B) Average symptom development of infected tobacco leaves after indicated treatment 6 and 12 dpi. Mean values ± st. error of three (6 dpi) and four (12 dpi) independent biological experiments consisting of ten leaves each. Letters indicate different significance groups based on paired, two-sided Student’s t-test (p < 0.05).