CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
Biotransformation of Ceria Nanoparticles in Cucumber Plants
Zhang, P; Ma, YH; Zhang, ZY; He, X; Zhang, J; Guo, Z(郭智); Tai, RZ(邰仁忠); Zhao, YL; Chai, ZF
2012
Source PublicationACS NANO
ISSN1936-0851
Volume6Issue:11
AbstractBiotransformation is a critical factor that may modify the toxicity, behavior, and fate of engineered nanoparticles in the environment. CeO2 nanoparticles (NPs) are generally recognized as stable under environmental and biological conditions: The present study aims to Investigate the biotransformation of CeO2 NPs in plant systems. Transmission electron microscopy (TEM) image show needlelike clusters on the epidermis and in the intercellular spaces of cucumber roots after a treatment with 2000 mg/L CeO2 NPs for 21 days.. By Using a soft X-ray scanning transmission microscopy (STXM) technique, the, needlelike clusters were verified to be cePO(4). Near edge X-ray absorption fine structure (XANES) spectra show that Ce presented in the roots as CeO2 and CePO4 while in the shoots as CeO2 and cerium carboxylates. Simulated studies indicate that reducing substances (e.g., ascorbic acids) played a key role in the transformation process and organic acids (e.g., citric acids) can promote particle dissolution. We speculate that CeO2 NPs were first absorbed on the root surfaces and partially dissolved with the assistance-of the organic acids and reducing substances excreted by the roots. The released Ce(III) ions were precipitated on the root surfaces and in Intercellular spaces with phosphate, or form complexes with carboxyl compounds during translocation to the shoots. To the best of our knowledge, this is the first report confirming the biotransformation and in-depth exploring the translocation process of CeO2 NPs In plants.
Language英语
Funding Project应物所项目组
WOS IDWOS:000311521700063
Citation statistics
Cited Times:195[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/13097
Collection中科院上海应用物理研究所2011-2019年
Recommended Citation
GB/T 7714
Zhang, P,Ma, YH,Zhang, ZY,et al. Biotransformation of Ceria Nanoparticles in Cucumber Plants[J]. ACS NANO,2012,6(11).
APA Zhang, P.,Ma, YH.,Zhang, ZY.,He, X.,Zhang, J.,...&Chai, ZF.(2012).Biotransformation of Ceria Nanoparticles in Cucumber Plants.ACS NANO,6(11).
MLA Zhang, P,et al."Biotransformation of Ceria Nanoparticles in Cucumber Plants".ACS NANO 6.11(2012).
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