Ultraviolet Effects on Killing, Fruiting Body Formation and the Spores of Dictyostelium Discoideum

Abstract— ‐Ultraviolet effects on amoeboid cells of three strains of Dictyosrrlium discoidruin, NC‐4. γs‐13 and γs‐18. for killing. fruiting body formation, spore formation and viability of the spores were studied. The strain of γs‐13 was more sensitive to UV light for killing than NC‐4 at 10% survival. In addition. γs‐13 was the most sensitive strain among the three for fruiting body formation and spore formation. The developmental process of this organism, however, showed a large resistance to UV light when compared with the killing. The spores of γs‐13 formed after UV irradiation were mostly non‐viable, though those of γs‐18 and NC‐4 were fully viable