Figure 5.

A, Effect of endogenous JA concentrations on the infection of B. cinerea in tomato. Tertiary leaves of WT (tomato cv Castlemart) and def1 tomato mutants (tomato cv Castlemart) were infected with 10 droplets of 4 μL of spore suspension containing 10⁶ spores mL⁻¹, 0.01 m Glc, and 6.7 mm KH₂PO₄. Data are means of two experiments containing 10 leaves per treatment. Infections were evaluated 4 d after inoculation by counting the number of spreading B. cinerea lesions on each leaf. Bars with different letters are significantly different with P = 0.05 after a logistic regression. B, Effect of exogenous ± JA feeding through petioles of tomato leaves from 5-week-old plants. Leaves were infected with 10 droplets of 4 μL of spore suspension containing 10⁶ spores mL⁻¹, 0.01 m Glc, and 6.7 mm KH₂PO₄. Data are means of two experiments containing 10 leaves per treatment. Bars with different letters are significantly different with P = 0.05 after a logistic regression.