Figure 4From: Phylogeny and expression profiling of CAD and CAD-like genes in hybrid Populus (P. deltoides × P. nigra): evidence from herbivore damage for subfunctionalization and functional divergenceRelative expression quantification of PoptrCAD3 and PoptrCAD15 genes in directly treated vs systemically induced leaves from Populus plants. Leaves from the corresponding tissue of control plants were used as a calibrator. ± means SE of three biological replicate samples.; **p < 0.01, ***p < 0,001 according to Student's t-test. Y axis indicates the relative expression level of each gene compared to the control tissue (non-treated leaves).Back to article page