Figure 3.

Cross pathogenicity tests of P. savastanoi strains. (A) Symptoms generated by P. savastanoi strains at 90 days post-inoculation. Control (-), negative control, plants inoculated with 10 mM MgCl₂. (B) Populations of P. savastanoi strains in different hosts. Bars represent mean populations at 90 days post-inoculation from three biological replicates, with standard error; different letters indicate means that are significantly different using ANOVA test followed by the Bonferroni t-test (p < 0.05). Psv ICMP 4352 was obtained from the CFBP collection as strain CFBP 1670. Psv, Psn, Psf and Psr, P. savastanoi pathovars savastanoi, nerii, fraxini, and retacarpa, respectively.