卡罗塔达乌斯
化学
铀酰
液泡
细胞质
细胞内
植物细胞
细胞培养
悬挂(拓扑)
核化学
生物物理学
生物化学
离子
植物
生物
有机化学
基因
同伦
数学
纯数学
遗传学
作者
Jenny Jessat,Henry Moll,Warren A. John,Marie-Louise Bilke,René Hübner,Jérôme Kretzschmar,Robin Steudtner,Björn Drobot,Thorsten Stumpf,Susanne Sachs
标识
DOI:10.1016/j.jhazmat.2022.129520
摘要
Daucus carota suspension cells showed a high affinity towards Eu(III) and U(VI) based on a single-step bioassociation process with an equilibrium after 48-72 h. Cells responded with an increased metabolic activity towards heavy metal stress. Luminescence spectroscopy pointed to multiple species for both f-block elements in the culture media, providing initial hints of their interaction with cells and released metabolites. Using nuclear magnetic resonance spectroscopy, we could prove that malate, as an released metabolite in the culture medium, was found to complex with U. Luminescence spectroscopy also showed that Eu(III)-EDTA species are interacting with the cells. Furthermore, Eu(III) and U(VI) coordination is dominated by phosphate groups provided by the cells. We found that Ca ion channels of D. carota cells were involved in the uptake of U(VI), which led to a bioprecipitation of U(VI) in the vacuole of the cells, most probably as uranyl(VI) phosphates along with an intracellular sorption of U(VI) on biomembranes by lipid structures. Eu(III) could be found locally concentrated in the cell wall and in the cytoplasm with a co-localization with phosphorous and oxygen.
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