CAT and Nematoda infectious disease: In response to nematode infection, expression of SOD (3.277 folds), CAT (2.283 folds), POD (2.295 folds), and GST (1.720 folds) was significantly found enhanced in tomato seedlings as compared to non-infected ones whereas the expression of GPOX was found suppressed by 0.8878 folds (Figure 4).