Fig. 3
Changes in contents of brassinosteroids (BRs) (a, b), ascorbic acid (AsA) (c) and hydrogen peroxide (H2O2) (d), and activities of ascorbic acid peroxidase (APX) (e), dehydroascorbate reductase (DHAR) (f) and monodehydroascorbate reductase (MDHAR) (g) in young panicle of the rice cultivar YD-6 under well-watered (WW), moderate soil-drying (MD) and severe soil-drying (SD) treatments. SPD, PMC, and PF represent spikelet primordium differentiation, pollen mother cells meiosis, and pollen filling, respectively. Vertical bars represent ± standard error of the mean (n = 6) where these exceed the size of the symbol. Different letters above the bars indicate the least significant difference at P = 0.05 within the same measurement date