Sarapultseva Elena I, Ustenko Kseniya, Dubrova Yuri E
Department of Biotechnology, National Research Nuclear University MEPhI, Kashirskoe Highway, 31, Moscow, 115409, Russian Federation; A. Tsyb Medical Radiological Research Centre - Branch of the National Medical Research Radiological Center of the Ministry of Health of the Russian Federation, 4, Korolev Street, Obninsk, 249036, Kaluga region, Russian Federation.
Department of Biotechnology, National Research Nuclear University MEPhI, Kashirskoe Highway, 31, Moscow, 115409, Russian Federation.
J Environ Radioact. 2019 Apr;199-200:75-83. doi: 10.1016/j.jenvrad.2019.01.008. Epub 2019 Jan 29.
The results of recent studies have provided strong evidence for the combined effects of diet restriction and exposure to chemical on the survival and reproduction of aquatic organisms. However, the combined effects of diet restriction and exposure to ionizing radiation remain poorly understood. To establish whether parental irradiation and diet restriction can affect the survival and fertility of directly exposed crustaceans and their progeny, Daphnia magna were given 10, 100 and 1000 mGy of acute γ-rays either during chronic diet restriction or normal food supply. Acute exposure to 1000 mGy significantly compromised the viability of irradiated Daphnia and their first-generation progeny, but did not affect the second-generation progeny. Similarly acute exposure to 100 and 1000 mGy also significantly compromised the fertility of F and FDaphnia and did not affect the F generation. Low level of food supply compromised the viability of non-exposed and irradiated Daphnia, whereas their fertility was substantially affected by all diets. The dose-response for the effects of irradiation on viability and fertility of Daphnia received different food supply were practically similar, thus implying that the level of nutrition and acute exposure to ionizing radiation independently affect the life history traits in crustacean.
近期研究结果为饮食限制和接触化学物质对水生生物生存和繁殖的综合影响提供了有力证据。然而，饮食限制和接触电离辐射的综合影响仍知之甚少。为了确定亲代辐射和饮食限制是否会影响直接暴露的甲壳类动物及其后代的生存和繁殖能力，在长期饮食限制或正常食物供应期间，给大型溞分别给予10、100和1000毫戈瑞的急性γ射线照射。急性暴露于1000毫戈瑞显著损害了受照射大型溞及其第一代后代的生存能力，但对第二代后代没有影响。同样，急性暴露于100和1000毫戈瑞也显著损害了F代和F1代大型溞的繁殖能力，且对F2代没有影响。低水平的食物供应损害了未受照射和受照射大型溞的生存能力，而它们的繁殖能力则受到所有饮食的显著影响。在不同食物供应条件下，辐射对大型溞生存能力和繁殖能力影响的剂量反应实际上相似，这意味着营养水平和急性暴露于电离辐射独立影响甲壳类动物的生活史特征。
