ULTRASTRUCTURAL BASIS OF BIOTROPHIC RELATIONSHIPS BETWEEN BROWN RUST FUNGUS AND COMMON WHEAT
L. Ya. Plotnikova
Department of Plant Breeding, Genetics and Plant Physiology, Omsk State Agrarian University;
e-mail: LPlotnikova@rambler.ru
The ultrastructural research of relationships between common wheat and brown rust fungus Puccinia triticina
demonstrated that the biotrophy was based on the induction of plant cytoplasmic aggregate organization, nuclear
migration to haustorium and stimulation of mesophyll cell metabolism. Resistant reactions in the form of
hypersensitivity and depositions on plant cell walls were suppressed up to fungal sporogenesis. Cytoplasmic
reorganization and nuclear taxis to haustorium were not registered in the epidermal and vascular bundle sheath cells.
Key words: cell ultrastructure, Triticum aestivum, Puccinia triticina, biotrophy, tolerance
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