Figure 5.

Glucanase (GLU) activity in roots (a) and shoots (b), and catalase (CAT) activity in roots (c) and shoots (d), of susceptible tomato plants, untreated (CONTR) and treated with salicylic acid (+SA), and of resistant tomato plants (RES), 5 days after inoculation with 300 invasive juveniles (J2s) of the root‐knot nematode Meloidogyne incognita. Data are the mean fold changes ± SD in enzyme activity of tissues from infested plants relative to tissues from uninfested control plants (the value of unity indicates no change). Means were determined from three biological replicates. Asterisks indicate that the mean fold change is significantly different from unity as determined by Kolmogorov–Smirnov test (P < 0.05).