Figure 8.

Effect of od-2 on host resistance to M. sexta larvae. No-choice bioassays were performed by placing first instar M. sexta larvae on wild-type (WT) and od-2 mutant plants. A, Photograph taken 12 d after initiation of the feeding trial. B, Mean ± se weight of M. sexta larvae (n = 16) reared for 12 d on either wild-type or od-2 plants. Each plant was challenged with two larvae. C, Results from an independent bioassay in which three M. sexta larvae were reared for 10 d on each of eight wild-type and od-2 plants. Data show the mean ± se weight of larvae (n = 24). Asterisks represent significant differences between wild-type and od-2 plants (unpaired t test: ** P < 0.01).