AUX and ABA profiles of the two accessions. (A) The corresponding ratios of ABA to AUX from the above figures are plotted against the developmental age of the fruits (DAP) of STB (black squares) and BTB (red circles). (B) AUX levels of the two Tartary buckwheat accessions (STB, black squares; BTB, red circles) is plotted against the developmental stages (days after pollination) (n = 3); (C) ABA levels of the two Tartary buckwheat accessions (STB, black squares; BTB, red circles) is plotted against the developmental stages (days after pollination) (n = 3). (D) Cell proliferation during 13–25 DAP of fruit development (STB, black squares; BTB, red circles) (n = 5); standard deviations are indicated in the different panels; * and ** indicate significant differences (α = 0.05; α = 0.01, LSD) among treatments, respectively.