MMP11 and infection: Specifically, the expression of Sl1-MMP and Sl3-MMP in Pst DC3000-infected plants showed >5 folds of increases over those in the mock-inoculated plants at 24 h, whereas the expression of Sl2-MMP was induced significantly with peaks at 12 and 24 h after infection with Pst DC3000 (Fig. 2b).