Figure 3From: Jasmonate-dependent induction of polyphenol oxidase activity in tomato foliage is important for defense against Spodoptera exigua but not against Manduca sextaFeeding preference of S. exigua larvae is determined by terpene content. (A) Dual-choice test for feeding preference comparing trichome-cured wild-type (blue) and OPR3-RNAi leaves (green) were performed as in Figure 2B. The consumed leaf area is shown in percent as the mean +/- SD of 58 experiments. Differences between the means are not significant (Wilcoxon signed rank test: P = 0.895). (B) Dual-choice tests comparing artificial diet to which cis-3-hexenal (n = 44) or a blend of mono- and sesquiterpenes (n = 86) were added in concentrations reflecting the content of wild-type (blue) or OPR3-RNAi trichomes (green). Diet consumption after 20 hrs is shown in percent as the mean +/- SD. Asterisks indicate significant preference (Wilcoxon signed rank test: ***P < 0.001).Back to article page