Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 44, Issue 19, Pages 7315-7320Publisher
AMER CHEMICAL SOC
DOI: 10.1021/es903891g
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Funding
- National Science Foundation and the Environmental Protection Agency [EF 0830117]
- Department of Energy, Office of Biological and Environmental Research
- National Institutes of Health, National Center for Research Resources
- USDA [2008-38422-19138]
- UT System
- BBRC (NIH NCRR) [2G12RR008124-16A1]
- NSF [CHE-0840525]
- Mexican National Council for Science and Technology CONACYT [CB 61649]
- Council for Science and Technology in Guanajuato [08-16-k662-127]
- Direct For Biological Sciences [0830117] Funding Source: National Science Foundation
- Direct For Mathematical & Physical Scien
- Division Of Chemistry [0840525] Funding Source: National Science Foundation
- Div Of Biological Infrastructure [0830117] Funding Source: National Science Foundation
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Concern and interest related to the effects of nanomaterials on living organisms are growing in both the scientific and public communities. Reports have described the toxicity of nanoparticles (NPs) on micro- and macro-organisms, including some plant species. Nevertheless, to the authors' knowledge there are no reports on the biotransformation of NPs by edible terrestrial plants. Here, shown for the first time, is evidence pertaining to the biotransformation of ZnO and CeO2 NPs in plant seedlings. Although the NPs did not affect soybean germination, they produced a differential effect on plant growth and element uptake. By using synchrotron X-ray absorption spectroscopy we obtained clear evidence of the presence of CeO2 NPs in roots, whereas ZnO NPs were not present. Random amplified polymorphic DNA assay was applied to detect DNA damage and mutations caused by NPs. Results obtained from the exposure of soybean plants to CeO2 NPs show the appearance of four new bands at 2000 mg L-1 and three new bands at 4000 mg L-1 treatment In this study we demonstrated genotoxic effects from the exposure of soybean plants to CeO2 NPs.
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