Fig. 4.

Two ProDH genes are overexpressed in source leaves of B. napus. Laminae from four leaf ranks having a different sink/source balance at the vegetative stage (60 DAS) were sampled either 3 h before (dark) or 3 h after (light) the beginning of the illumination period. In addition, the midveins sampled in dark conditions were also analysed. Expression of each gene copy was normalized relative to two reference genes UBQ11 and RibS3. Values are the means ±SD of five independent biological replicates. Different letters indicate that mean values are significantly different between the different leaf ranks (P-value <0.05). Different numbers indicate that mean values are significantly different between the three conditions (light lamina, dark lamina, and dark midvein) for each leaf rank (P-value <0.05). (This figure is available in colour at JXB online.)