In order to determine whether the silencing of CmWRKY15-1 will affect the activities of protective enzymes in chrysanthemum under the infection of CWR, we measured the activities of antioxidant enzymes (SOD,POD,CAT) and defense-related enzymes (PAL,CHI) in the WT and TRV-WRKY15-1 at different time points. This evidence concerns the gene CAT and infection.