A, B POD enzyme activity at 5μmol (A) and 10 μmol min−1 · mg protein−1 unit (B) on S. annua and its variation between LIF and HIF. Analysis of Tukey test with P < 0.01 and LSMEAN (Minimal quadratic means) were used and the average POD quantity / 10 plants / 1 m2 sub-transect were considered. Bars represent standard errors. Different letters indicate statistically significant differences at P < 0.01 level.