The Effect of Clubroot (Plasmodiophora brassicae) Infection on Cabbage Seedling Leaf Lipid Peroxidation

The aim was to study the membrane lipid peroxidation indicators and protective enzymes activity of the Chinese cabbage leaf under clubroot bacteria stress conditions. Taking the susceptible 91-12B and resistant CR91-12B cabbage as test material, shots was adopted to carry out the inoculation, and then determined by sampling. 91-12B and CR91-12B activities of antioxidant enzymes showed increase and then decreased. The results showed that resistant CR91-12B responded quickly and timely defense to pathogens, reactive oxygen species in dynamic equilibrium. Susceptible 91-12B responded slowly, the defense was not timely; the balance of reactive oxygen system was broken. It also found that, 8 days after the inoculation of the bacteria was the reaction time of resistance CR91-12B. The experiment verified the relationship between clubroot resistance and membrane lipid oxidation which provided basis for the applications of growth regulators, synthetic active oxygen scavenger in resistance to clubroot and early screening of CR91-12B.