{"database":"biostudies-literature","file_versions":[],"scores":null,"additional":{"submitter":["Rico CM"],"funding":["Intramural EPA"],"pagination":["1807-1812"],"full_dataset_link":["https://www.ebi.ac.uk/biostudies/studies/S-EPMC9504423"],"repository":["biostudies-literature"],"omics_type":["Unknown"],"volume":["5(8)"],"pubmed_abstract":["The transformation of cerium oxide nanoparticles (CeO<sub>2</sub>-NPs) in soil and its role in plant uptake is a critical knowledge gap in the literature. This study investigated the reduction and speciation of CeO<sub>2</sub>-NPs in barley (<i>Hordeum vulgare</i> L.) cultivated in soil amended with 250 mg CeO<sub>2</sub>-NPs kg<sup>-1</sup> soil. Synchrotron micro-X-ray fluorescence (μXRF) was employed for spatial localization and speciation of CeO<sub>2</sub>-NPs in thin sections of intact roots at the soil-root interface. Results revealed that Ce was largely localized in soil and at the root surface in nanoparticulate form (84-89%). However, a few hot spots on root surfaces revealed highly significant reduction (55-98%) of CeO<sub>2</sub>-NPs [Ce(IV)] to Ce(III) species. Interestingly, only roots in close proximity to hot spots showed Ce uptake which was largely CeO<sub>2</sub> (89-91%) with very little amount Ce(III) (9-10%). These results suggest that the reduction of CeO<sub>2</sub>-NPs to Ce(III) is needed to facilitate uptake of Ce."],"journal":["Environmental science. Nano"],"pubmed_title":["Cerium oxide nanoparticles transformation at the root-soil interface of barley (<i>Hordeum vulgare</i> L.)."],"pmcid":["PMC9504423"],"funding_grant_id":["EPA999999"],"pubmed_authors":["Marcus MA","Rico CM","Johnson MG"],"additional_accession":[]},"is_claimable":false,"name":"Cerium oxide nanoparticles transformation at the root-soil interface of barley (<i>Hordeum vulgare</i> L.).","description":"The transformation of cerium oxide nanoparticles (CeO<sub>2</sub>-NPs) in soil and its role in plant uptake is a critical knowledge gap in the literature. This study investigated the reduction and speciation of CeO<sub>2</sub>-NPs in barley (<i>Hordeum vulgare</i> L.) cultivated in soil amended with 250 mg CeO<sub>2</sub>-NPs kg<sup>-1</sup> soil. Synchrotron micro-X-ray fluorescence (μXRF) was employed for spatial localization and speciation of CeO<sub>2</sub>-NPs in thin sections of intact roots at the soil-root interface. Results revealed that Ce was largely localized in soil and at the root surface in nanoparticulate form (84-89%). However, a few hot spots on root surfaces revealed highly significant reduction (55-98%) of CeO<sub>2</sub>-NPs [Ce(IV)] to Ce(III) species. Interestingly, only roots in close proximity to hot spots showed Ce uptake which was largely CeO<sub>2</sub> (89-91%) with very little amount Ce(III) (9-10%). These results suggest that the reduction of CeO<sub>2</sub>-NPs to Ce(III) is needed to facilitate uptake of Ce.","dates":{"release":"2018-01-01T00:00:00Z","publication":"2018 Jun","modification":"2025-04-21T14:19:52.23Z","creation":"2025-04-21T14:19:52.23Z"},"accession":"S-EPMC9504423","cross_references":{"pubmed":["36161269"],"doi":["10.1039/C8EN00316E","10.1039/c8en00316e"]}}