Figure 3.
Level of superoxide anions (A), hydrogen peroxide (B) and lipoperoxides (C) in U. lactuca cultivated without ANT (open circles) and with 5 μM of ANT (black circles) for 0–72 h. The level of superoxide anions and hydrogen peroxide are expressed as nanomole per gram of fresh tissue (FT) and lipoperoxides in nanomole per gram of dry tissue (DT) and time in hours. The subframe represents the level of hydrogen peroxide from 0 to 12 h of culture. Symbols represent mean values of three independent experiments SD. Letters indicate significant differences among experiments (P < 0.05).