Figure 3. Inhibitory effects of HCAAs on B. cinerea development.

(a) B. cinerea lesions on the leaves of wild-type (WT), GUS-transgenic control and ThACT plants 48 h after inoculation. Means (± > + SE) of relative lesion areas with different letters are significantly different (n = 47−77; ANOVA followed by Tukey-Kramer HSD test, P < 0.05). (b) Dose effect of exogenous CouAgm on germination of B. cinerea conidia. The conidia were grouped by germ tube length (0–10, 11–20, and >21 µm) to evaluate how well they grew. Means with different lower-case letters are significantly different (n = 222−302, χ²-test weighted by the Bonferroni correction, df = 1, P < 0.05/n = 0.008, n = 6: the number for all combinations of the 4 groups).