Effect of a Zinc Phosphate Shell on the Uptake and Translocation of Foliarly Applied ZnO Nanoparticles in Pepper Plants ( Capsicum annuum ).

Autor: Rodrigues S; Centre for Environmental and Marine Studies (CESAM), Department of Environment and Planning, Universidade de Aveiro, 3810-193 Aveiro, Portugal., Avellan A; Centre for Environmental and Marine Studies (CESAM), Department of Chemistry, Universidade de Aveiro, 3810-193 Aveiro, Portugal.; Géosciences-Environnement-Toulouse (GET), CNRS, UMR 5563 CNRS, UT3, IRD, CNES, OMP, 31400 Toulouse, France., Bland GD; Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States., Miranda MCR; Centre for Environmental and Marine Studies (CESAM), Department of Chemistry, Universidade de Aveiro, 3810-193 Aveiro, Portugal., Larue C; Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), 31400 Toulouse, France., Wagner M; Géosciences-Environnement-Toulouse (GET), CNRS, UMR 5563 CNRS, UT3, IRD, CNES, OMP, 31400 Toulouse, France.; Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), 31400 Toulouse, France., Moreno-Bayona DA; Centre de Recherche sur la Biodiversité et l'Environnement (CRBE), Université de Toulouse, CNRS, IRD, Toulouse INP, Université Toulouse 3 - Paul Sabatier (UT3), 31400 Toulouse, France., Castillo-Michel H; The European Synchrotron, ESRF, 71 Avenue des Martyrs, CS40220, 38043 Grenoble, Cedex 9, France., Lowry GV; Department of Civil and Environmental Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States., Rodrigues SM; Centre for Environmental and Marine Studies (CESAM), Department of Environment and Planning, Universidade de Aveiro, 3810-193 Aveiro, Portugal.
Jazyk: angličtina
Zdroj: Environmental science & technology [Environ Sci Technol] 2024 Feb 10. Date of Electronic Publication: 2024 Feb 10.
DOI: 10.1021/acs.est.3c08723
Abstrakt: Here, isotopically labeled 68 ZnO NPs (ZnO NPs) and 68 ZnO NPs with a thin 68 Zn 3 (PO 4 ) 2 shell (ZnO_Ph NPs) were foliarly applied (40 μg Zn) to pepper plants ( Capsicum annuum ) to determine the effect of surface chemistry of ZnO NPs on the Zn uptake and systemic translocation to plant organs over 6 weeks. Despite similar dissolution of both Zn-based NPs after 3 weeks, the Zn 3 (PO 4 ) 2 shell on ZnO_Ph NPs (48 ± 12 nm; -18.1 ± 0.6 mV) enabled a leaf uptake of 2.31 ± 0.34 μg of Zn, which is 2.7 times higher than the 0.86 ± 0.18 μg of Zn observed for ZnO NPs (26 ± 8 nm; 14.6 ± 0.4 mV). Further, ZnO_Ph NPs led to higher Zn mobility and phloem loading, while Zn from ZnO NPs was stored in the epidermal tissues, possibly through cell wall immobilization as a storage strategy. These differences led to higher translocation of Zn from the ZnO_Ph NPs within all plant compartments. ZnO_Ph NPs were also more persistent as NPs in the exposed leaf and in the plant stem over time. As a result, the treatment of ZnO_Ph NPs induced significantly higher Zn transport to the fruit than ZnO NPs. As determined by spICP-TOFMS, Zn in the fruit was not in the NP form. These results suggest that the Zn 3 (PO 4 ) 2 shell on ZnO NPs can help promote the transport of Zn to pepper fruits when foliarly applied. This work provides insight into the role of Zn 3 (PO 4 ) 2 on the surface of ZnO NPs in foliar uptake and in planta biodistribution for improving Zn delivery to edible plant parts and ultimately improving the Zn content in food for human consumption.
Databáze: MEDLINE
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