The Killing Effects of Ultraviolet Light and X-rays on Free-living Nematode, Rhabditidae tokai

Abstract

Nematode/Radiation/Aging The life-shortening effects of ultraviolet light (UV) and X-rays were investigated with a strain of free-living nematode, Rhabditidae tokai. UV exhibited a significant life-shortening effect on adult worms, and it also inhibited growth of larvae, hatching of eggs and reproduction. Sensitivity to UV was decreased with increasing ages. In contrast, nematodes showed a marked resistance to X-rays. Data were obtained suggesting that X-ray-induced singlestrand breaks in DNA can be rapidly and efficiently rejoined by a repair mechanism. Malformations were observed when immature larvae were irradiated with X-rays. © 1980, Journal of Radiation Research Editorial Committee. All rights reserved.