Figure 7

Phenotypes (a–c), and GA1 and GA3 level changes (d) of transgenic line Y7-1 and wild type Y478 pot-grown under treatments without or with foliar spraying with exogenous ABA. In (a–c), analyses were conducted after 9 days of foliar spraying with exogenous ABA. Y7-1 was T4-generation lines. Spraying with exogenous ABA started on the first day after the pot mix moisture was at the upper thresholds of 50%. In (d), the second fully-expanded leaves down from the tope of 3 individual plants selected at random were analyzed, where each datum represented the the fold value of change under foliar spraying with exogenous ABA in comparison with that in respective maize line under treatments without exogenous ABA. The red columns were used as the control levels of endogenous GA and ABA, where the values under corresponding treatments without exogenous ABA were set to 1. The double asterisk (**) indicated a significant difference at p < 0.01. ABA, Abscisic acid; GA, Gibberellin; Y478, Maize inbred line Ye478; Y7-1, Y478 overexpressing ZmPMP3g.