Interactive effects of plant defense and predation risk on the efficiency of conversion of digested food (mean ± SE) for (a) T. ni, and (b) M. sexta.
Plant defense was manipulated using three plant types varying in their jasmonate signaling pathway with ‘jasmonate insensitive’ expressing low resistance, ‘wild-type’ the intermediate phenotype, and ‘jasmonate overexpress’ displaying high resistance. White bars are the predator-free control, and grey bars are labeled ‘PR’ to denote the ‘predation risk’ treatment (i.e., presence of a non-lethal stink bug). Statistical outcome for the main factors, covariate (weight), and interaction term are displayed in the upper right corner of each panel; asterisks correspond to the level of significance: * = P<0.05, ** = P<0.01, *** = P<0.001. N = 10–13 and 17–21 replicates per treatment combination for T. ni and M. sexta, respectively.