| ORIGINAL ARTICLE |
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Experiments
for the study of symptoms of the
powdery mildew pathogen on wheat leaves showed that
induced oxidative stress caused changes in conidial germination and
appressorial formation of the wheat powdery mildew fungus.
The oxidative stress was brought about by treatment with hydrogen
peroxide and 3-amino-1,2,4-triazole.
It has been shown that
prooxidants have a prominent role in regulating fungal
development, leading to abnormal conidial germination, thus
preventing the fungal penetration into plant cells.
Treatment of wheat plants with 5 mM H2O2
and 4 mM 3-amino-1,2,4-triazole resulted in a significant reduction
of powdery mildew disease severity compared to the control. In most
cases, on samples of infected plant tissues there were anomalies in
the elongation of germ tubes and globe-shaped appressoria.
From the data which was obtained in this study,
it can be concluded that the result of the interaction
of powdery mildew fungus with wheat is affected by the increased
generation of reactive oxygen species, leading to suppression or
disruption of the pathological process.
