Fig. 7.

Total peroxidase (A, B) and NADH-POD oxidase activity (C, D) of ionic (A, C) and covalent (B, D) cell wall fractions. Cell wall fractions were isolated from different root zones of 3-day-old pea seedlings. Peroxidase activity was measured using pyrogallol as substrate as described in the Material and methods. Oxidizing activity of peroxidase was measured with NADH in the presence of catalytic concentrations of Mn and p-coumaric acid. Values with different letters are significantly different at P < 0.05, according to Holm–Sidak test.