Effect of the high temperature on the expression of anthocyanin biosynthesis genes and their temporal patterns in 9311bk and WT kernels. (A–G) The time course of OsPAL, OsCHS, OsCHI, OsF3H, OsF3’H, OsANS and OsDFR expression during kernel development and (H) comparison of relative expression of genes involved in anthocyanin biosynthesis in developing kernel of 9311bk at after anthesis. Vertical bars represent standard errors (n = 3). Different letters represent significant differences (p < 0.05) and the asterisks also represent significant differences (* p < 0.05 and ** p < 0.01). DAA stands for days after anthesis.