Figure 3
Transcript abundance of terpene synthase genes in herbivore -damaged (herb) and undamaged control (ctr) leaves of P. trichocarpa . Caterpillars were allowed to feed for 24 h on apical LPI3 (leaf plastochron index 3) leaves. Gene expression was determined by qRT-PCR. Means and standard errors are shown (n = 5). The student's t-test was used to test for statistical significance. Asterisks indicate a significant difference between herbivore-infested and untreated control leaves. ctr, control treatment; herb, herbivory.