Fig. 4
Validation of the expression of candidate genes during nitrogen starvation by quantitative Real-time RT-PCR analysis. The expression at 0Â day was set as 1, and the relative expression level was calculated for several genes. AGPase ADP-glucose pyrophosphorylase, GBSS granule bound starch synthase, SBE starch-branching enzyme, SDBE starch-debranching enzyme, SSs soluble starch synthase, SUS sucrose synthase, UGPase UDP-glucose pyrophosphorylase, ISA isoamylase, SP sucrose phosphorylase