Fig. 4

Superoxide radical (a) and hydrogen peroxide (b) contents of mango after treatment with E-beam at a dose of 0 (control) and 0.5 kGy, and then stored at 13 °C for 16 days. The data are expressed as mean ± standard error. Asterisks (*) indicate significant differences between the two treatments during storage (t-test; *P < 0.05, **P < 0.01, ***P < 0.001, ns not significant)