Zinc from foliar-applied nanoparticle fertiliser is translocated to wheat grain: a 65Zn radiolabelled translocation study comparing conventional and novel foliar fertilisers

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dc.contributor.authorDoolette, CJen_AU
dc.contributor.authorRead, TLen_AU
dc.contributor.authorHowell, NRen_AU
dc.contributor.authorCresswell, Ten_AU
dc.contributor.authorLombi, Een_AU
dc.date.accessioned2021-12-09T21:32:16Zen_AU
dc.date.available2021-12-09T21:32:16Zen_AU
dc.date.issued2020-12-20en_AU
dc.date.statistics2021-11-18en_AU
dc.description.abstractFoliar zinc (Zn) fertilisers can be used to supplement or replace soil applications of Zn in situations where soil properties may decrease the plant bioavailability of Zn. However, conventional foliar Zn formulations such as zinc sulfate can cause leaf damage due to the rapid release of high amounts of Zn2+ into leaf tissue which can be locally phytotoxic. Zinc oxide nanoparticles (ZnO-NPs) offer an alternative approach by providing a more sustained release of Zn into leaf tissue, and potentially avoiding the need for multiple applications. We compared the efficacy of ZnO-NPs and microparticles (ZnO-MPs) to that of conventional formulations (ZnCl2 and ZnEDTA) in wheat. This is the first study to use 65Zn radiolabelled formulations and gamma spectrometry to determine the translocation of Zn to the grains and subsequent efficiency of foliar-applied ZnO-NP fertilisers. We found that ZnEDTA was the most efficient fertiliser in terms of the proportion of applied Zn translocated to wheat grain. We also investigated the effect of Zn application rate on fertiliser efficiency. For all forms of Zn, when plants were treated with Zn at 750 mg/L or 75 mg/L, there were no significant differences in the concentration of applied Zn translocated to the grain. This suggests that current Zn application rates could be decreased while still maintaining the nutritional quality of grain. Finally, using photo-stimulated luminescence (PSL) autoradiography and synchrotron-based X-ray fluorescence microscopy (XFM) we showed that the grain distribution of foliar-applied Zn mirrors that of Zn derived from root uptake. Crown Copyright © 2020 Published by Elsevier B.V.en_AU
dc.description.sponsorshipThis work was supported by the Australian Research Council (ARC) and Sonic Essentials through the Linkage Projects funding scheme (LP130100741).en_AU
dc.identifier.articlenumber142369en_AU
dc.identifier.citationDoolette, C. L., Read, T. L., Howell, N. R., Cresswell, T., & Lombi, E. (2020). Zinc from foliar-applied nanoparticle fertiliser is translocated to wheat grain: a 65Zn radiolabelled translocation study comparing conventional and novel foliar fertilisers. Science of The Total Environment, 749, 142369. doi:10.1016/j.scitotenv.2020.142369en_AU
dc.identifier.issn0048-9697en_AU
dc.identifier.journaltitleScience of The Total Environmenten_AU
dc.identifier.urihttps://doi.org/10.1016/j.scitotenv.2020.142369en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/12404en_AU
dc.identifier.volume749en_AU
dc.language.isoenen_AU
dc.publisherElsevieren_AU
dc.subjectTracer techniquesen_AU
dc.subjectWheaten_AU
dc.subjectEDTAen_AU
dc.subjectZincen_AU
dc.subjectZinc oxidesen_AU
dc.subjectZinc compoundsen_AU
dc.subjectNanoparticlesen_AU
dc.subjectFertilizersen_AU
dc.titleZinc from foliar-applied nanoparticle fertiliser is translocated to wheat grain: a 65Zn radiolabelled translocation study comparing conventional and novel foliar fertilisersen_AU
dc.typeJournal Articleen_AU
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