Fig. 6

Effects of exogenous ABA and IAA applications on starch biosynthesis. a Effects of exogenous ABA, NAA and 6-BA on starch accumulation (n = 5). b Effects of exogenous hormones on starch accumulation of grains during the grain-filling stages (n = 5). c Effects of exogenous hormones on the rate of starch accumulation during grain filling. d Effects of exogenous hormones on OsSUS3, OsBEIIb and OsGBSSI expression at 20 DAF (n = 3). e Effects of exogenous hormones on SUS, BE and GBSS activities at 20 DAF (n = 3), 1 U = 1 μg/min/mg protein. Data are presented as the mean ± SD. * P < 0.05, ** P < 0.01