PATHOGENESIS-RELATED PROTEINS IN BARLEY INDUCED BY POWDERY MILDEW INFECTION

Proteins in intercellular washing fluid (IWF) from noninoculated and p owdery mildew inoculated barley leaves were separated by polyacrylamid gel electrophoresis. Induction of pathogenesis-related (PR) proteins was ascertained as early as in the preparasitic stage of host-parasite interaction, i.e. up to 24h after the inoculation. One multiple form of IWF-peroxidase was especially strongly activated after inoculation. The quantity of PR proteins was increasing up to 72h. The accumulatio n of PR proteins at host-parasite incompatibility was more expressive than at compatibility.