摘要：

The callus of cotton varieties with different resistance to cotton verticillium wilt pathogen were inoculated with VD toxin of Verticillium dahliae. The activities of peroxidase (POD) and SOD in them were examined before inoculated and at different days after inoculation. The results showed that the increase of POD activity was earlier and higher in susceptible varieties than in resistant ones. The decrease of SOD activity was greater in susceptible varieties than that in resistant ones. Pathogenesis related proteins(PR proteins) were induced in the callus after inoculation.

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