Figure 5From: 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 of the rubisco gene in directly treated and systemically induced Populus leaves. Leaves from the corresponding tissue of control plants were used as a calibrator. ± means SE; **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