Fig. 5

Grain-filling rate and expression profile of the ZmSMR family genes in maize endosperm. a The grain-filling rate was measured from 5 to 35 DAP every 5 days. The trendline was drawn through the weight increase of hundred-grain weight every 5 days. b The maize endosperm samples were taken every 5 days from 5 to 35 DAP. Relative expression ratios in these sample were calculated with reference to the sample in which the respective transcript exhibited the lowest expression. The relative expression values were log2 transformed. The qRT-PCR data were normalized against the expression of Actin as an internal control. Error bars indicate standard deviations. The names of the genes are written in the upper right corner of each bar diagram