Abstract
At this research, the effect of mycorrhizal fungi (Glomus etunicatum) On Pero Xidase (POX) and Phenylalanine Ammonia Lyase (PAL) activities and isozymatic pattern against Gaeumannomyces graminis were studied in wheat plants. Seeds were planted in inoculated soils in 4 treatment groups including Control (C), Mycorrhiza (M), Pathogen (P) and Pathogen- Mycorrhiza (PM). Plants were harvested 17 days after inoculation. POX activities in PM group were significantly greater than control group. Significant differences were not observed between P and C groups. POX activities significantly decreased in M group. PAL activities in M group were significantly greater than other groups. PAL activities in P and PM groups were significantly greater than C group. The appearance of new isozyme was induced in PM group. It is highly probable that induced POX isozymic activity and/or appearance of new isozymes may be responsible for elevated POX activity. Present results showed that the isozymatic patterns of POX were changed by inoculation ofmycorrhiza and/or pathogen. The obtained results from this research is agreement with other researches about the enhancing effect of mycorrhizal fungi on PAL activity. The obtained results from the present research, confirm this opinion that defense related proteins is not induced in compatible interactions or is weak.
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