Figure 6

Phytohormone concentrations in individual P. trichocarpa leaves after herbivory restricted to an apical or basal leaf or no herbivory. Single leaves were measured from either control trees (ctr), trees which received herbivory apically on leaf LPI3 (ha, herbivory apical) or basally on leaf LPI10 (hb, herbivory basal). Means and standard errors are shown (n = 5). To test for statistical significance between the treatments in one leaf position, a one way analysis of variance (ANOVA) was performed. Different letters show significant differences. t indicates a trend (0.05 < p < 0.1).