CYCS and infection: In this study, cytochrome c peroxidase termed No.10 was newly induced after infection, and the author believed that hydrogen-peroxide-redox-type cytochrome c reaction (2 cytochrome c (Fe2+) + H2O2 + 2H+→ 2 cytochrome c (Fe3+) + 2H2O) was catalyzed by the upregulated expression of cytochrome c peroxidase, which improved the increasing synthesis of phytoalexin and inhibited the growth of S. scitamineum and thus reduced the harm of S. scitamineum.