Growth parameters of HOSUT10 grains. A, Suc concentration in caryopses ± sd (n = 5). B, Fresh weight accumulation (n = 100). C, Dry weight accumulation (n = 100). D, ABA concentration (pmol g−1 fresh weight) ± sd (n = 5). Significant differences according to t test are as follows: aP < 0.05, bP < 0.01.