Fig. 9.

Genetic analysis for combinative effects of ethylene and gibberellin on Hpa1-enhanced photosynthesis, EXP expression, and growth of Arabidopsis. The WT plant, etr1-1 and ga5-1 single mutants, and etr1-1 ga5-1 double mutant were tested in the experiments. Ten-day-old plants were treated separately with an aqueous Hpa1 solution and with pure water or an aqueous EVP solution. Five days later, analyses of A _N rates and EXP expression were performed on the second youngest leaves. Fresh weight of plants was scored 10 days after treatment. Data are shown as mean values ± SD from three experimental repeats (15 plants per repeat). Different letters on bar graphs indicate significant differences by the statistical analysis