Benzidine and NADH peroxidase (PO) apoplastic activitiy in five-six-day old wheat seedlings were studied.
Light-dependent changes of enzyme activity caused by glycosylation level modification of heme proteins have been
found. Peroxidase organo-specificity in the apoplast of wheat seedlings has been revealed. It is supposed that peroxidases
have a predominantly oxidase function in roots (prooxidant function of NADH-PO) and a predominantly
peroxidase function in seedlings (antioxidant function of benzidine-PO).
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