Lee Y J, Ducoff H S
Mech Ageing Dev. 1984 Sep;27(1):101-9. doi: 10.1016/0047-6374(84)90087-3.
Shortly after gamma-irradiation, flour beetles (Oklahoma strain of Tribolium confusum) exhibited a decline in resistance to oxygen toxicity. Beginning about two weeks after irradiation, however, the LD50 exposure time in pure oxygen was much greater than that of nonirradiated beetles, and this enhanced resistance persisted for about 6 months. The magnitude of the enhancement was a function of dose, and decreased with increasing age at irradiation. These characteristics of a radiation-enhanced resistance to a stress are comparable to the characteristics of radiation-enhanced longevity in Tribolium, in that after irradiation mortality rate is less than that of controls for about 6 months, the magnitude of the effect is dose-dependent, and older beetles are refractory to the effect. Irradiation under anoxic conditions reduced the development of oxygen resistance to the same degree that it reduced acute radiation lethality, suggesting that the amount of biological damage is the critical factor. These results are discussed in terms of the "induced repair" theory of radiation-enhanced longevity of insects.
在伽马射线照射后不久，面粉甲虫（赤拟谷盗俄克拉荷马品系）对氧毒性的抗性出现下降。然而，大约在照射后两周开始，在纯氧中的半数致死暴露时间比未照射的甲虫长得多，并且这种增强的抗性持续了约6个月。增强的幅度是剂量的函数，并且随着照射时年龄的增加而降低。这种对压力的辐射增强抗性的特征与赤拟谷盗中辐射增强寿命的特征相当，即照射后死亡率在约6个月内低于对照组，效应的幅度是剂量依赖性的，并且较老的甲虫对该效应不敏感。在缺氧条件下进行照射，降低氧抗性的程度与降低急性辐射致死率的程度相同，这表明生物损伤量是关键因素。根据昆虫辐射增强寿命的“诱导修复”理论对这些结果进行了讨论。
