Fig. 7

Time-specific expression of BpMYB21 (a) and BpMYB61 (b) in birch plantlets. The relative expression of BpMYB21 and BpMYB61 was quantified by quantitative RT-PCR. Reported values are means of three replicates, and error bars were obtained from multiple replicates. Values with different superscript letters in a column are significantly different (p < 0.05)