Investigating the foliar uptake of zinc from conventional and nano-formulations: a methodological study

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dc.contributor.authorRead, TLen_AU
dc.contributor.authorDoolette, CLen_AU
dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorHowell, NRen_AU
dc.contributor.authorAughterson, RDen_AU
dc.contributor.authorKaratchevtseva, Ien_AU
dc.contributor.authorDonner, Een_AU
dc.contributor.authorKopittke, PMen_AU
dc.contributor.authorSchjoerring, JKen_AU
dc.contributor.authorLombi, Een_AU
dc.date.accessioned2021-09-13T22:27:38Zen_AU
dc.date.available2021-09-13T22:27:38Zen_AU
dc.date.issued2019-06-06en_AU
dc.date.statistics2021-09-13en_AU
dc.description.abstractZinc (Zn) deficiency affects half of the world’s arable soil and one-third of the world’s human population. Application of Zn foliar fertilisers to cereal crops can be an effective way to increase grain Zn content; however, commonly used formulations can scorch the leaf (e.g. soluble Zn salts) or are prohibitively expensive (e.g. chelated Zn, ZnEDTA). Zinc oxide nanoparticles (ZnO-NPs) may offer an efficient and cost-effective alternative, but little is known regarding the mechanisms of Zn uptake and translocation within the plant. Foliar-applied Zn is analytically challenging to detect, locate and quantify, as it is omnipresent. Furthermore, any single analytical technique does not have the detection limit or spatial resolution required. In this study, the uptake and mobility of foliar-applied ZnEDTA, ZnO-NPs and ZnO microparticles (ZnO-MPs) to wheat (Triticum aestivum L.) were investigated using inductively coupled plasma mass spectroscopy (ICP-MS), synchrotron-based X-ray fluorescence microscopy (XFM) and radiotracing techniques using 65Zn-labelled formulations. The three techniques were compared to highlight limitations and advantages of each. We also report, for the first time, a novel time-resolved in vivo autoradiography imaging technique that can be used to visualise 65Zn in live plants treated with foliar applications of 65ZnO-NPs and MPs. The images were supplemented by gamma spectroscopy analysis for quantification. The results of this study provide important insights into the analytical challenges faced when investigating foliar-applied Zn nanofertilisers in plants. Potential solutions using nuclear techniques are also discussed, which in turn may ultimately lead to the development of more efficient foliar fertilisers. © CSIRO 2019en_AU
dc.description.sponsorshipThis work was supported by the Australian Research Council (ARC) and Sonic Essentials through the Linkage Projects funding scheme (LP130100741), and the Research Training Program (RTP). We also thank Sonic Essentials for providing the ZnO materials we used in the study. Parts of this research were performed on the XFM beamline at the Australian Synchrotron, part of ANSTO. We thank Dr David Paterson, Dr Martin De Jonge and Dr Daryl Howard for their assistance and expertise on the beamline. We also acknowledge the support of ANSTO in providing the radiotracing facilities and radiotracer handling and analysis expertise as part of ANSTO's Nuclear Science and Technology and Landmark Infrastructure cluster. We acknowledge Attila Stopic and Grant Griffiths for their assistance with the production of the Zn radiotracers.en_AU
dc.identifier.citationRead, T. L., Doolette, C. L., Cresswell, T., Howell, N. R., Aughterson, R., Karatchevtseva, I., Donner, E., Kopittke, P. M., Schjoerring, J. K. & Lombi, E. (2019). Investigating the foliar uptake of zinc from conventional and nano-formulations: a methodological study. Environmental Chemistry, 16(6), 459-469. doi:10.1071/en19019en_AU
dc.identifier.issn1448-2517en_AU
dc.identifier.issue6en_AU
dc.identifier.journaltitleEnvironmental Chemistryen_AU
dc.identifier.pagination459-469en_AU
dc.identifier.urihttps://doi.org/10.1071/EN19019en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11684en_AU
dc.identifier.volume16en_AU
dc.language.isoenen_AU
dc.publisherCSIRO Publishingen_AU
dc.subjectWheaten_AU
dc.subjectLeavesen_AU
dc.subjectTranslocationen_AU
dc.subjectDetectionen_AU
dc.subjectZincen_AU
dc.subjectNanoparticlesen_AU
dc.subjectNanotechnologyen_AU
dc.subjectFoliar uptakeen_AU
dc.titleInvestigating the foliar uptake of zinc from conventional and nano-formulations: a methodological studyen_AU
dc.typeJournal Articleen_AU
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