Figure 6
Overexpression of a cytosolic isoform of NPR1 (NPR1-HBD) restores the impaired JA-induced disease resistance in ocp3-1 plants while dexamethasone treatment eliminates this protective effect. (a) Two-week-old plants were treated by dipping with a solution of 10 mM MgSO4 (Control) or 50 μM MeJA. After two days, plants were challenge inoculated as described in Figure 3. Asterisks indicate significant difference from the control treatment (P < 0.05) using the Student's t test. (b) As in (a), plants were treated with 10 mM MgSO4 (Control), with 50 μM MeJA, with 5 μM dexamethasone (DEX) or with 50 μM MeJA plus 5 μM dexamethasone (DEX). The experiments were repeated three times with similar results.