Fig. 6From: Cloning and expression of BpMYC4 and BpbHLH9 genes and the role of BpbHLH9 in triterpenoid synthesis in birchQuantitative assay results for BpMYC4 and BpbHLH9 in birch saplings treated by different hormones. The relative expressions of BpMYC4 and BpbHLH9 were quantified by quantitative RT-PCR. Reported values are the means of three replicates, and standard errors are indicated as vertical lines on the top of each bar. * Indicates a significant difference between the control and experimental treatments (PÂ <Â 0.05). ** Indicates a highly significant difference between the control and experimental treatments (PÂ <Â 0.01)Back to article page