Fig. 3.

Dependence of the O₂ evolution rate (A) and methyglyoxal (MG) synthesis rate (B) on the intensity of red light in chloroplasts. The reaction mixture (1 ml) containing 40 µg of chloroplasts and 10 mM 3-phosphoglycerate (3-PGA) was illuminated at the indicated light intensity. The O₂ evolution rate was calculated from the steady-state increase in [O₂] at 10 min. The MG synthesis rate was calculated from the concentration of MG at 10 min. Values are expressed as means ± SE of five independent experiments.