Effect of silicon on the distribution and speciation of uranium in sunflower (Helianthus annuus)

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dc.contributor.authorWang, LLen_AU
dc.contributor.authorLaing, Yen_AU
dc.contributor.authorLiu, Sen_AU
dc.contributor.authorChen, Fen_AU
dc.contributor.authorWang, JGen_AU
dc.contributor.authorChen, YLen_AU
dc.contributor.authorPaterson, DJen_AU
dc.contributor.authorKopittke, PMen_AU
dc.contributor.authorWang, YHen_AU
dc.contributor.authorLiu, Cen_AU
dc.contributor.authorYe, Yen_AU
dc.date.accessioned2024-09-19T01:56:36Zen_AU
dc.date.available2024-09-19T01:56:36Zen_AU
dc.date.issued2024-10en_AU
dc.date.statistics2024-08-23en_AU
dc.description.abstractSunflower (Helianthus annuus) can potentially be used for uranium (U) phytoremediation. However, the factors influencing the absorption of U and its subsequent distribution within plant tissues remain unclear, including the effect of silicon (Si) which is known to increase metal tolerance. Here, using hydroponics, the effect of Si on the distribution and speciation of U in sunflower was examined using synchrotron-based X–ray fluorescence and fluorescence-X-ray absorption near-edge spectroscopy. It was found that ∼88 % of U accumulates within the root regardless of treatments. Without the addition of Si, most of the U appeared to bind to epidermis within the roots, whereas in the leaves, U primarily accumulated in the veins. The addition of Si alleviated U phytotoxicity and decreased U concentration in sunflower by an average of 60 %. In the roots, Si enhanced U distribution in cell walls and impeded its entry into cells, likely due to increased callose deposition. In the leaves, Si induced the sequestration of U in trichomes. However, Si did not alter U speciation and U remained in the hexavalent form. These results provide information on U accumulation and distribution within sunflower, and suggest that Si could enhance plant growth under high U stress. © 2024 Elsevier B.V.en_AU
dc.description.sponsorshipThis work was financially supported by the National Natural Science Foundation of China (NSFC, 32101838), the Fundamental Research Funds for the Central Universities (D5000210898), and Innovation Foundation for Doctor Dissertation of Northwestern Polytechnical University (CX2024030). This research was undertaken on the X-ray Fluorescence Microscopy beamline at the Australian Synchrotron, part of ANSTO.en_AU
dc.identifier.articlenumber135433en_AU
dc.identifier.citationWang, L., Liang, Y., Liu, S., Chen, F., Ye, Y., Chen, Y., Wang, J., Paterson, D. J., Kopittke, P. M., Wang, Y., & Li, C. (2024). Effect of silicon on the distribution and speciation of uranium in sunflower (Helianthus annuus). Journal of Hazardous Materials, 478, 135433. doi:10.1016/j.jhazmat.2024.135433en_AU
dc.identifier.issn0304-3894en_AU
dc.identifier.journaltitleJournal of Hazardous Materialsen_AU
dc.identifier.urihttps://apo.ansto.gov.au/handle/10238/15680en_AU
dc.identifier.volume478en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.relation.urihttps://doi.org/10.1016/j.jhazmat.2024.135433en_AU
dc.subjectUraniumen_AU
dc.subjectSiliconen_AU
dc.subjectSunflowersen_AU
dc.subjectDistributionen_AU
dc.subjectPlant tissuesen_AU
dc.subjectSynchrotronsen_AU
dc.subjectX-ray fluorescence analysisen_AU
dc.subjectAbsorptionen_AU
dc.subjectToxicityen_AU
dc.subjectPlantsen_AU
dc.subjectSpectroscopyen_AU
dc.titleEffect of silicon on the distribution and speciation of uranium in sunflower (Helianthus annuus)en_AU
dc.typeJournal Articleen_AU
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