Fig. 1.

The effects of hydrogen peroxide (H₂O₂) and N-acetylcysteine (NAC) on soybean seed germination. (A) Change of germination with time of soybean seeds treated with distilled water (control), and with 10, 25, or 50 mm NAC, 100 mm H₂O₂ or 100 mm mannitol (Man). (B) Germination of soybean seeds treated with distilled water (control), 25 mm NAC, 100 mm H₂O₂ or 25 mm NAC + 100 mm H₂O₂ for 24 h. Bars with different letters differ significantly (P < 0·05, Tukey's test, n = 5).