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Expression level of genes encoding (a) PAL and (b) 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. Data were obtained in four independent experiments with six 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.
