CELLULAR FEATURES OF IMMUNE REACTION OF COMMON WHEAT WITH Lr19 GENE TO BROWN RUST FUNGUS INFECTION
L. Ya. Plotnikova
Department of Plant Breeding, Genetics and Plant Physiology, Omsk State Agrarian University;
e-mail: LPlotnikova@rambler.ru
The effect of resistant gene Lr19 on the development of brown rust fungus Puccinia triticina in the immune
line of Thatcher variety was similar to that of nonhost species. The development of the fungus was inhibited in
the plant tissue at the early stages. The fungus cells demonstrated structural disorganization of the nuclei and mitochondria
before host cell invasion. The plant cell membranes and chloroplasts were changed; large chromatin
aggregates appeared in their nuclei. Hypersensitive reaction developed after inhibition of the fungus.
Key words: immunity, histology, cell ultrastructure, Triticum aestivum, Puccinia triticina, hypersensitivity
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