Fig. 4From: Exogenous abscisic acid (ABA) improves the filling process of maize grains at different ear positions by promoting starch accumulation and regulating hormone levels under high planting densityEffects of ABA application on ZR, IAA, ABA, and GA3 contents in DH605 (A, C, E, G, I, K, M and O) and ZD958 (B, D, F, H, J, L, N and P) during the 2021 and 2022 growing seasons. ICK and IABA mean inferior grain in the control and ABA treatments, respectively. SCK and SABA mean superior grain in the control and ABA treatments, respectively. Means and standard errors are calculated from three replicates. Different letters within a growth period denote significant differencesBack to article page