Figure 4. Effects of exogenous ABA and H₂O₂ on seed germination of different transgenic lines.

Sterilized seeds were germinated at 28°C on sterile filter papers in the petri dishes containing different concentrations of ABA (20 µM) or H₂O₂ (20 mM) or both. Germination (based on radicals >2 mm) was recorded at 72 h after imbibition. Fifty seeds per genotype were used. Data shown are means of three biological replications±SE. Asterisks (*) indicate significant difference (P<0.05) between the seed germination of transgenic lines compared with the wildtype.