1. Differentiation between chemo- and radiotoxicity of 137 Cs and 60 Co on Lemna minor.
- Author
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Van Dyck I, Vanhoudt N, Vives I Batlle J, Vargas CS, Horemans N, Van Gompel A, Nauts R, Wijgaerts A, Marchal W, Claesen J, and Vangronsveld J
- Subjects
- Photosynthesis, Starch pharmacology, Radiation Monitoring, Araceae, Cesium Radioisotopes, Cobalt Radioisotopes
- Abstract
The uptake and effects of stable Cs and Co on L.minor were extensively studied, together with the effects of gamma radiation using a
137 Cs or60 Co source. Innovative is that we combined external irradiation (from137 Cs or60 Co sources) with the direct uptake of certain amounts of stable Cs or Co to simulate the impact of the same mass of a radioisotope compared with that of the stable element. Such approach allows to differentiate between chemo- and radiotoxicity of137 Cs or60 Co, permitting to study the137 Cs and60 Co uptake by L. minor without using high concentrations of these elements in solution. Our results indicate that radiotoxicity of both137 Cs and60 Co has a greater importance compared to their chemotoxicity. This was also supported by the independent action and concentration addition concepts. Both concepts resulted in a good prediction of the dose-response curve of the combination exposure. The maximal removal of137 Cs or60 Co per gram dry matter of L. minor was lower compared with the removal of the corresponding stable isotope. The toxicity of60 Co was higher compared to137 Cs based on EC50 values and uptake data. With respect to the effects on photosynthetic pigments, starch and soluble sugars contents, only starch increased in a concentration- and dose-dependent manner., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier Ltd. All rights reserved.)- Published
- 2024
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