Fig. 4

Effects of different quenchers on PB90-triggered hypocrellin production. Three-day-old cells treated with 10 mmol/L glycerol, 10 mmol/L histidine, 200 units/mL SOD, 200 units/mL CAT, 0.5 mmol/L cPITO, 150 mg/L verapamil and 5 nmol/L PB90, hypocrellin production were measured at 3 days after PB90 was added. The quenchers were added 30 min before PB90 treatment. The control received vehicle solvent only. Values were means of five independent experiments. Bars represented standard errors. (1) Control; (2) PB90; (3) PB90 + glycerol; (4) PB90 + histidine; 5. PB90 + SOD; (6) PB90 + CAT; (7) PB90 + cPITO; (8) PB90 + verapamil