1. The severe toxicity of CuO nanoparticles to the photosynthesis of the prokaryotic algae Arthrospira sp
- Author
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Qiang Zhang, Wei Wang, Xingkai Che, Qi Sun, Yuting Li, Ruirui Ding, Yujie Li, Hui-Yuan Gao, and Zi-Shan Zhang
- Subjects
inorganic chemicals ,Photoinhibition ,Health, Toxicology and Mutagenesis ,Metal Nanoparticles ,010501 environmental sciences ,Photosynthesis ,01 natural sciences ,Algae ,mental disorders ,Dissolved organic carbon ,Spirulina ,Environmental Chemistry ,health care economics and organizations ,0105 earth and related environmental sciences ,chemistry.chemical_classification ,Reactive oxygen species ,biology ,technology, industry, and agriculture ,General Medicine ,respiratory system ,biology.organism_classification ,Pollution ,Photosynthetic capacity ,Electron transport chain ,chemistry ,Thylakoid ,Environmental chemistry ,Nanoparticles ,Copper - Abstract
This research first verified that prokaryotic algae are more sensitive to toxicity of CuO nanoparticles (CuO NPs) than eukaryotic algae and that CuO NPs damaged photosynthesis of prokaryotic algae (Arthrospira sp.) but had no effect on respiration. The Cu2+ released by CuO NPs caused a bending deformation of the thylakoid, which was an important cause of the decline in photosynthetic capacity. In addition, the D1 protein was the most susceptible site to CuO NPs. The degradation of D1 protein reduced photosynthetic electron transport, which enhanced the excess excitation energy to cause the accumulation of reactive oxygen species (ROS) to further result in oxidative stress on algae. Dissolved organic matter (DOM) increased the toxicity of CuO NPs to photosynthesis of Arthrospira sp. The damage of photosynthesis caused by CuO NPs is an important reason why CuO NPs have a serious toxicity to algae.
- Published
- 2021