Figure 4.

Activity of PPO in roots of tomato plants grown in water (control) or supplemented with 10 or 50 μM CAN after 24 and 72 h of culture, measured in (a) extract and (b) gel. Results of densitometric analysis are shown in the table. Data were obtained in three independent experiments with three repetitions each. Asterisks (*) indicate significance between treatments and the control at the same time of culture period at p ≤ 0.05, based on Student’s test.