Removal of H(2)O(2), oxidation of toxic reductants, biosynthesis and degradation of lignin, suberization, auxin catabolism, response to environmental stresses such as wounding, pathogen attack and oxidative stress. These functions might be dependent on each isozyme/isoform in each plant tissue. May contribute to protection against cold-induced oxidative stress. 2 a phenolic donor + H2O2 = 2 a phenolic radical donor + 2 H2O Binds 2 calcium ions per subunit. Binds 1 heme b (iron(II)-protoporphyrin IX) group per subunit. Highly expressed in suspension cultured cells. Weak expression also found in the stems of intact plants. No expression in leaf, tuberous root and non-tuberous root. Very low expression level 0.5 days after subculture (DAS). By wounding and cold stress. Induced by acclimation and repressed by chilling. Belongs to the peroxidase family. Classical plant (class III) peroxidase subfamily.