Enzymes in fungal plant pathogenesis

In fungal plant pathogenesis, enzymes are playing a crucial role and they a re involved in the external and internal interactions. To restrict the deve lopment of fungal pathogens, the plants formed many defense mechanisms. The y built mechanical barriers from lignin, suberin, callose and produced a lo t of antimicrobial compounds with low molecular weight like phenols, chinon s, alkaloids and others. Enhanced production of some enzymes and their acti vity increasing is one of the most important processes in plant defense. Th ese enzymes occur frequently in many isoforms and are involved in synthesis of defense substances or have a direct antimicrobial activity.