Biotransformation of Ceria Nanoparticles in Cucumber Plants

CORC > 上海应用物理研究所 > 中国科学院上海应用物理研究所 > 中科院上海应用物理研究所2011-2017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
刊名	ACS NANO
	2012
卷号	6 期号:11
ISSN号	1936-0851
英文摘要	Biotransformation 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.
语种	英语
WOS记录号	WOS:000311521700063
公开日期	2013-09-11
内容类型	期刊论文
源URL	[http://ir.sinap.ac.cn/handle/331007/13097]
专题	上海应用物理研究所_中科院上海应用物理研究所2011-2017年
推荐引用方式 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).