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Defence mechanisms of sugarbeet participating on resistance against pathogens and pests
Grigová, Vendula ; Burketová, Lenka
The plants dispose their own defence mechanisms against pathogen attack, which include both constitutive and induced structural changes, but mainly biochemical changes. SAR (Systemic Acquired Resistance) is an important defence mechanism. The objective was to compare defence reactions of sugar beet against the causal agent of rhizomania, i.e. BNYVV and its vector Polymyxa betae, with sugar beet reaction after soil nematode attack and with reaction to treatment with chemical and biological inductors of resistance. We have shown that the same spectrum of hydrolytic PR-proteins (basic -1,3-glucanase (Glu2), basic class IV chitinase (Ch4), acidic class III chitinase (SE2), basic class II chitinase (Ch2)) is induced both after pathogen/pest attack and after BTH inductor treatment; nevertheless, the intensity of induction is related to a particular agent. Increased accumulation of glucanase was detected immunohistologically in sugar beet tissues both after pathogen/pest attack and after BTH inductor treatment.
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