Figure 4.

Percentages of Col-0 seeds that completed germination and developed fully expanded green cotyledons after 10 d under: 150 mm NaCl (A), 0.5 mm paraquat (B), heat treatment (50°C; C), 50 μm GA₃ plus 150 mm NaCl (D), 50 μm GA₃ plus 0.5 mm paraquat (E), and heat treatment (50°C; F) in the presence of 50 μm GA₃. G, Differences in heat tolerance (50°C) in wild-type and transgenic lines treated or not with 50 μm GA₃. Approximately 100 seeds of each line were sowed and scored. Data are means ± sd of three independent experiments. Asterisks denote significant differences at P ≤ 0.05 between treated and nontreated seeds.