Fig. 12. Enhanced stress tolerance in the caspase-3-MO-injected embryos following UV irradiation. Survival ratio was compared between the control MO-injected and the caspase-MO-injected embryos. MO was introduced by microinjection into one-cell stage embryos. Open triangles, control embryo injected with control MO (N=90); filled triangles, wild-type embryo injected with caspase-3-MO (N=90). The data were analysed using the Kaplan–Meier survival analysis, and an asterisk indicates a statistically significant difference (P<0.05). Each value indicates the mean ± s.e.m.