Figure 3.

Relative consumption rates (RCRs; amount of leaf mass eaten per unit caterpillar weight per day) of M. brassicae caterpillars feeding on P. lanceolata during two bioassays, performed when plants were (A) 7 weeks old (left panel), and (B) 10 weeks old (right panel). Each panel displays results for plants grown under four combinations of light intensity (L-: low light; L+: high light) and soil phosphorus treatments (P-: low soil P; P+: high soil P). In addition, plants had either be challenged by leaf application of jasmonic acid (JA) 48 h. prior to the bioassay (hatched bars) or not (non-hatched bars) and plants had either been inoculated with the AMF F. mosseae (bars with gray background) or not (white background). Bars within panels that do not share the same letter are significantly different from each other (post hoc tests using LS means, p < 0.05). The top row of letters refers to bars that display treatments without AMF, the second row of letters to those with AMF.