Particle-specific toxicity and bioavailability of cerium oxide (CeO2) nanoparticles to Arabidopsis thaliana

Yang, Xinping, Pan, Haopeng, Wang, Peng and Zhao, Fang-Jie (2016) Particle-specific toxicity and bioavailability of cerium oxide (CeO2) nanoparticles to Arabidopsis thaliana. Journal of Hazardous Materials, . doi:10.1016/j.jhazmat.2016.03.054


Author Yang, Xinping
Pan, Haopeng
Wang, Peng
Zhao, Fang-Jie
Title Particle-specific toxicity and bioavailability of cerium oxide (CeO2) nanoparticles to Arabidopsis thaliana
Formatted title
Particle-specific toxicity and bioavailability of cerium oxide (CeO2) nanoparticles to Arabidopsis thaliana
Journal name Journal of Hazardous Materials   Check publisher's open access policy
ISSN 1873-3336
0304-3894
Publication date 2016-03-21
Year available 2016
Sub-type Article (original research)
DOI 10.1016/j.jhazmat.2016.03.054
Open Access Status Not Open Access
Total pages 9
Place of publication Amsterdam, Netherlands
Publisher Elsevier
Collection year 2017
Formatted abstract
The use of manufactured cerium oxide nanoparticles (CeO2-NPs) in consumer products has increased markedly over the past decade, and their release into natural ecosystems is unavoidable. This study investigated the phytotoxicity and uptake of CeO2-NPs in Arabidopsis thaliana grown in an agar medium. Although low concentrations of CeO2-NPs had stimulatory effects on plant growth, at higher concentrations, CeO2-NPs reduced growth and had adverse effects on the antioxidant systems and photosystem. Importantly, the toxicity resulted from the nanoparticles per se, rather than from the dissolved Ce ions. CeO2-NPs were taken up and subsequently translocated to shoot tissues, and transmission electron microscopy (TEM) showed the presence of a large number of needle-like particle aggregations in the intercellular regions and the cytoplasm of leaf cells. The up-translocation factor to shoots was independent of the concentrations of Ce in the roots and the supplied forms of Ce (i.e. CeO2-NPs, CeO2-bulk, and ionic Ce), suggesting that endocytosis is likely to be a general mechanism responsible for the translocation of these Ce compounds. These findings provide important information regarding the toxicity and uptake of CeO2-NPs in plants, which needs to be considered in environmental risk assessment for the safe use and disposal of CeO2-NPs.
Keyword Arabidopsis thaliana
CeO2
Nanoparticles
Toxicity
Translocation
Uptake
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: HERDC Pre-Audit
School of Agriculture and Food Sciences
 
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