Effect of high temperature on pigment accumulation in the rice kernel. (A) Temporal pattern of flavonoid content in kernel of 9311 and 9311bk, (B) temporal pattern of anthocyanin content in kernel of 9311 and 9311bk, (C) temporal pattern of polyphenol content in kernel of 9311 and 9311bk, (D) anthocyanin content in mature grains of 9311 and 9311bk, (E) anthocyanin (ANS), cyanidin-3-O-glucoside (C3G) and peonidin-3-O-glucoside (P3G) content in mature grain of 9311bk measured by HPLC, (F) temporal pattern of total soluble sugar content in kernel of 9311 and 9311bk, (G) temporal pattern of 1000-grain weight of 9311 and 9311bk and (H) temporal pattern of starch content in kernel of 9311 and 9311bk 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.