Expression of genes regulated by jasmonic acid (JA) or salicylic acid (SA). Mean expression levels normalized to RCE1 (+ SEM, n = 3, two technical replicates) of WIPI-II, PR-P6 and GGPS1 in leaves attacked by Tetranychus evansi (white bars), systemic leaves of the same plants (crosshatched bars), leaves attacked by Tetranychus urticae (light dotted bars), systemic leaves (dark dotted bars) and leaves of non-attacked plants (black bars). The effect of treatment was significant (manova: Pillai-Bartlett statistic = 1.41, d.f. = 4,13, P = 0.0060), as was the effect on each gene separately (anova: WIPI-II: F4,13 = 4.78, P = 0.014; PR-P6: F4,13 = 4.67, P = 0.015; GGPS1: F4,13 = 6.13, P = 0.005). Bars with different letters within each gene differ significantly.