Peroxidases are known to locate in various cell compartments,
and this localization determines their functions.
Thus, ionically bound enzymes are involved in
the cell-wall strengthening [18]. Healthy plants of
resistant cultivar displayed a higher activity of ionically
bound peroxidase (Fig. 2d) in comparison with susceptible
one. Infection differently affected this peroxidase
form in different cultivars. Thus, in the seedlings of susceptible
cv. Zhnitsa, cell-wall peroxidase activity
increased and remained at the level exceeding that in
control plants during the entire experiment (Fig. 2b). In
the seedlings of resistant cv. Zarya, the activity of ionically
bound peroxidase was below the control level
(Fig. 2d). This might be related to enhanced processes
of lignification and, correspondingly, with a tighter
enzyme binding to the cell walls (Fig. 3). It was shown
that resistant wheat cultivars infected with pathogenic
fungi were characterized by earlier and more intense
lignin accumulation