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- Publisher Website: 10.1093/aob/mcy135
- Scopus: eid_2-s2.0-85055743944
- PMID: 30020418
- WOS: WOS:000462548500006
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Article: Absorption of foliar-applied zn in sunflower (helianthus annuus): importance of the cuticle, stomata and trichomes
Title | Absorption of foliar-applied zn in sunflower (helianthus annuus): importance of the cuticle, stomata and trichomes |
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Authors | |
Keywords | Cuticle Stomata Trichomes Bundle sheath extension Zn foliar fertilizer Sunflower Foliar absorption |
Issue Date | 2019 |
Citation | Annals of Botany, 2019, v. 123, n. 1, p. 57-68 How to Cite? |
Abstract | • Background and Aims The pathways whereby foliar-applied nutrients move across the leaf surface remain unclear. The aim of the present study was to examine the pathways by which foliar-applied Zn moves across the sunflower (Helianthus annuus) leaf surface, considering the potential importance of the cuticle, stomata and trichomes. • Methods Using synchrotron-based X-ray florescence microscopy and nanoscale secondary ion mass spectrometry (NanoSIMS), the absorption of foliar-applied ZnSO4 and nano-ZnO were studied in sunflower. The speciation of Zn was also examined using synchrotron-based X-ray absorption spectroscopy. • Key Results Non-glandular trichomes (NGTs) were particularly important for foliar Zn absorption, with Zn preferentially accumulating within trichomes in ≤15 min. The cuticle was also found to have a role, with Zn appearing to move across the cuticle before accumulating in the walls of the epidermal cells. After 6 h, the total Zn that accumulated in the NGTs was approx. 1.9 times higher than in the cuticular tissues. No marked accumulation of Zn was found within the stomatal cavity, probably indicating a limited contribution of the stomatal pathway. Once absorbed, the Zn accumulated in the walls of the epidermal and the vascular cells, and trichome bases of both leaf sides, with the bundle sheath extensions that connected to the trichomes seemingly facilitating this translocation. Finally, the absorption of nano-ZnO was substantially lower than for ZnSO4, with Zn probably moving across the leaf surface as soluble Zn rather than nanoparticles. • Conclusions In sunflower, both the trichomes and cuticle appear to be important for foliar Zn absorption. |
Persistent Identifier | http://hdl.handle.net/10722/301832 |
ISSN | 2023 Impact Factor: 3.6 2023 SCImago Journal Rankings: 1.078 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Li, Cui | - |
dc.contributor.author | Wang, Peng | - |
dc.contributor.author | Van Der Ent, Antony | - |
dc.contributor.author | Cheng, Miaomiao | - |
dc.contributor.author | Jiang, Haibo | - |
dc.contributor.author | Read, Thea Lund | - |
dc.contributor.author | Lombi, Enzo | - |
dc.contributor.author | Tang, Caixian | - |
dc.contributor.author | De Jonge, Martin D. | - |
dc.contributor.author | Menzies, Neal W. | - |
dc.contributor.author | Kopittke, Peter M. | - |
dc.date.accessioned | 2021-08-19T02:20:50Z | - |
dc.date.available | 2021-08-19T02:20:50Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Annals of Botany, 2019, v. 123, n. 1, p. 57-68 | - |
dc.identifier.issn | 0305-7364 | - |
dc.identifier.uri | http://hdl.handle.net/10722/301832 | - |
dc.description.abstract | • Background and Aims The pathways whereby foliar-applied nutrients move across the leaf surface remain unclear. The aim of the present study was to examine the pathways by which foliar-applied Zn moves across the sunflower (Helianthus annuus) leaf surface, considering the potential importance of the cuticle, stomata and trichomes. • Methods Using synchrotron-based X-ray florescence microscopy and nanoscale secondary ion mass spectrometry (NanoSIMS), the absorption of foliar-applied ZnSO4 and nano-ZnO were studied in sunflower. The speciation of Zn was also examined using synchrotron-based X-ray absorption spectroscopy. • Key Results Non-glandular trichomes (NGTs) were particularly important for foliar Zn absorption, with Zn preferentially accumulating within trichomes in ≤15 min. The cuticle was also found to have a role, with Zn appearing to move across the cuticle before accumulating in the walls of the epidermal cells. After 6 h, the total Zn that accumulated in the NGTs was approx. 1.9 times higher than in the cuticular tissues. No marked accumulation of Zn was found within the stomatal cavity, probably indicating a limited contribution of the stomatal pathway. Once absorbed, the Zn accumulated in the walls of the epidermal and the vascular cells, and trichome bases of both leaf sides, with the bundle sheath extensions that connected to the trichomes seemingly facilitating this translocation. Finally, the absorption of nano-ZnO was substantially lower than for ZnSO4, with Zn probably moving across the leaf surface as soluble Zn rather than nanoparticles. • Conclusions In sunflower, both the trichomes and cuticle appear to be important for foliar Zn absorption. | - |
dc.language | eng | - |
dc.relation.ispartof | Annals of Botany | - |
dc.subject | Cuticle | - |
dc.subject | Stomata | - |
dc.subject | Trichomes | - |
dc.subject | Bundle sheath extension | - |
dc.subject | Zn foliar fertilizer | - |
dc.subject | Sunflower | - |
dc.subject | Foliar absorption | - |
dc.title | Absorption of foliar-applied zn in sunflower (helianthus annuus): importance of the cuticle, stomata and trichomes | - |
dc.type | Article | - |
dc.description.nature | link_to_OA_fulltext | - |
dc.identifier.doi | 10.1093/aob/mcy135 | - |
dc.identifier.pmid | 30020418 | - |
dc.identifier.pmcid | PMC6344099 | - |
dc.identifier.scopus | eid_2-s2.0-85055743944 | - |
dc.identifier.volume | 123 | - |
dc.identifier.issue | 1 | - |
dc.identifier.spage | 57 | - |
dc.identifier.epage | 68 | - |
dc.identifier.eissn | 1095-8290 | - |
dc.identifier.isi | WOS:000462548500006 | - |