Foliar application of zinc sulphate and zinc EDTA to wheat leaves: differences in mobility, distribution, and speciation

Foliar application of zinc sulphate and zinc EDTA to wheat leaves: differences in mobility, distribution, and speciation

Synchrotron-based X-ray analysis of living wheat leaves showed that foliar-applied ZnEDTA is taken up as a ligand complex, and typical Zn agricultural application rates may induce localized toxicity Abstract Foliar application of zinc (Zn) to crops is an effective way to increase the grain concentra...

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Veröffentlicht in:Journal of experimental botany 2018-08, Vol.69 (18), p.4469-4481
Hauptverfasser: Doolette, Casey L, Read, Thea L, Li, Cui, Scheckel, Kirk G, Donner, Erica, Kopittke, Peter M, Schjoerring, Jan K, Lombi, Enzo
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container_end_page 4481
container_issue 18
container_start_page 4469
container_title Journal of experimental botany
container_volume 69
creator Doolette, Casey L
Read, Thea L
Li, Cui
Scheckel, Kirk G
Donner, Erica
Kopittke, Peter M
Schjoerring, Jan K
Lombi, Enzo
description Synchrotron-based X-ray analysis of living wheat leaves showed that foliar-applied ZnEDTA is taken up as a ligand complex, and typical Zn agricultural application rates may induce localized toxicity Abstract Foliar application of zinc (Zn) to crops is an effective way to increase the grain concentration of Zn. However, the development of more efficient foliar Zn fertilizers is limited by a lack of knowledge regarding the distribution, mobility, and speciation of Zn in leaves once it is taken up by the plant. We performed an experiment using radiolabelled Zn (65Zn), and in situ time-resolved elemental imaging using synchrotron X-ray fluorescence microscopy (XFM), to investigate the behaviour of two commonly used Zn foliar fertilizers (Zn sulphate and ZnEDTA) in wheat (Triticum aestivum) leaves. Both experiments showed that Zn had limited mobility in leaves, moving
doi_str_mv 10.1093/jxb/ery236
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(ANL), Argonne, IL (United States). Advanced Photon Source (APS)</creatorcontrib><description>Synchrotron-based X-ray analysis of living wheat leaves showed that foliar-applied ZnEDTA is taken up as a ligand complex, and typical Zn agricultural application rates may induce localized toxicity Abstract Foliar application of zinc (Zn) to crops is an effective way to increase the grain concentration of Zn. However, the development of more efficient foliar Zn fertilizers is limited by a lack of knowledge regarding the distribution, mobility, and speciation of Zn in leaves once it is taken up by the plant. We performed an experiment using radiolabelled Zn (65Zn), and in situ time-resolved elemental imaging using synchrotron X-ray fluorescence microscopy (XFM), to investigate the behaviour of two commonly used Zn foliar fertilizers (Zn sulphate and ZnEDTA) in wheat (Triticum aestivum) leaves. Both experiments showed that Zn had limited mobility in leaves, moving &lt;25 mm from the application point after 24 h. Although limited, the translocation of Zn occurred quickly for both treatments; moving more between 3 h and 12 h after application than between 12 h and 24 h. Speciation analysis using synchrotron-based X-ray absorption near-edge structure (XANES) showed that ZnEDTA was in fact taken up in chelated form and not as ionic Zn (Zn2+). The XANES data also showed that Zn, from both treatments, was then complexed by ligands in the leaf (e.g. phytate and citrate), potentially in response to localized Zn toxicity. 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(ANL), Argonne, IL (United States). Advanced Photon Source (APS)</creatorcontrib><title>Foliar application of zinc sulphate and zinc EDTA to wheat leaves: differences in mobility, distribution, and speciation</title><title>Journal of experimental botany</title><addtitle>J Exp Bot</addtitle><description>Synchrotron-based X-ray analysis of living wheat leaves showed that foliar-applied ZnEDTA is taken up as a ligand complex, and typical Zn agricultural application rates may induce localized toxicity Abstract Foliar application of zinc (Zn) to crops is an effective way to increase the grain concentration of Zn. However, the development of more efficient foliar Zn fertilizers is limited by a lack of knowledge regarding the distribution, mobility, and speciation of Zn in leaves once it is taken up by the plant. 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Advanced Photon Source (APS)</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Foliar application of zinc sulphate and zinc EDTA to wheat leaves: differences in mobility, distribution, and speciation</atitle><jtitle>Journal of experimental botany</jtitle><addtitle>J Exp Bot</addtitle><date>2018-08-14</date><risdate>2018</risdate><volume>69</volume><issue>18</issue><spage>4469</spage><epage>4481</epage><pages>4469-4481</pages><issn>0022-0957</issn><eissn>1460-2431</eissn><abstract>Synchrotron-based X-ray analysis of living wheat leaves showed that foliar-applied ZnEDTA is taken up as a ligand complex, and typical Zn agricultural application rates may induce localized toxicity Abstract Foliar application of zinc (Zn) to crops is an effective way to increase the grain concentration of Zn. 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title Foliar application of zinc sulphate and zinc EDTA to wheat leaves: differences in mobility, distribution, and speciation
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