Fig. 2

Schematic diagram showing the procedures for studying the effect of X-ray photons on the radioadaptive response induced by alpha particles in zebrafish embryos that have been dechorionated at 4 hpf using a priming dose provided by (alpha particles) or (alpha particles + low-dose X-ray photons) and an X-ray challenging dose. AX_Y group: in which the dechorionated embryos received both the priming dose provided by (<0.88 mGy alpha-particle irradiation + level-Y X-ray irradiation) and the 2 Gy X-ray challenging dose, where level-Y was either 5 or 10 mGy; A group: in which the dechorionated embryos received both the priming dose provided by <0.88 mGy alpha-particle irradiation and the 2 Gy X-ray challenging dose; Control group: in which the dechorionated embryos were exposed to the X-ray challenging dose alone, without receiving a prior priming dose; D group: in which the dechorionated embryos did not receive any radiation dose.