| Title: | Silver nanoparticles enter the tree stem faster through leaves than through roots |
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| Authors: | ID Cocozza, Claudia, Dipartimento di Scienze e Tecnologie Agrarie, Alimentari, Ambientali e Forestali, Università di Firenze, via San Bonaventura 13, 50145 Florence, Italy; (Author)
ID Perone, Annalisa, Dipartimento di Bioscienze e Territorio, Università degli Studi del Molise, c.da Fonte Lappone snc, 86090 Pesche, Italy; (Author)
ID Giordano, Cristiana, Istituto Valorizzazione Legno e Specie Arboree, IVALSA-CNR, via Madonna del Piano 10, 50019 Firenze, Italy (Author)
ID Salvatici, Maria Cristina, Istituto di Chimica dei Composti Organo Metallici, ICCOM-CNR, via Madonna del Piano 10, 50019 Firenze, Italy (Author)
ID Pignattelli, Sara, Istituto per la Protezione Sostenibile delle Piante, IPSP-CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy (Author)
ID Raio, Aida, Istituto per la Protezione Sostenibile delle Piante, IPSP-CNR, via Madonna del Piano 10, 50019 Sesto Fiorentino, Italy (Author)
ID Schaub, Marcus, WSL, Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland (Author)
ID Sever, Kruno, Department of Forest Genetics, Dendrology and Botany, Faculty of Forestry, University of Zagreb, Svetoˇsimunska cesta 25, 10000 Zagreb, Croatia (Author)
ID Innes, John L., Faculty of Forestry, University of British Columbia, 2424 Main Mall, BC V6T 1Z4, Vancouver, Canada (Author)
ID Tognetti, Roberto, Dipartimento di Agricoltura, Ambiente e Alimenti, Università degli Studi del Molise, via de Sanctis sns, 86100 Campobasso, Italy (Author)
ID Cherubini, Paolo, WSL, Swiss Federal Institute for Forest, Snow and Landscape Research, Zürcherstrasse 111, 8903 Birmensdorf, Switzerland (Author) |
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| Files: |
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| Language: | English |
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| Work type: | Not categorized |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | UNG - University of Nova Gorica
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| Abstract: | A major environmental pollution problem is the release into the atmosphere of particulate matter, including nanoparticles (NPs), which causes serious hazards to human and ecosystem health, particularly in urban areas. However, knowledge about the uptake, translocation and accumulation of NPs in plant tissues is almost completely lacking. The uptake of silver nanoparticles (Ag-NPs) and their transport and accumulation in the leaves, stems and roots of three different tree species, downy oak (Quercus pubescens Willd.), Scots pine (Pinus sylvestris L.) and black poplar (Populus nigra L.), were assessed. In the experiment, Ag- NPs were supplied separately to the leaves (via spraying, the foliar treatment) and roots (via watering, the root treatment) of the three species. Uptake, transport and accumulation of Ag were investigated through spectroscopy. The concentration of Ag in the stem was higher in the foliar than in the root treatment, and
in poplar more than in oak and pine. Foliar treatment with Ag-NPs reduced aboveground biomass and stem length in poplars, but not in oaks or pines. Species-specific signals of oxidative stress were observed; foliar treatment of oak caused the accumulation of H2O2 in leaves, and both foliar and root treatments of poplar led to increased O2− in leaves.
Ag-NPs affected leaf and root bacteria and fungi; in the case of leaves, foliar treatment reduced bacterial populations in
oak and poplar and fungi populations in pine, and in the case of roots, root treatment reduced bacteria and increased fungi in poplar. Species-specific mechanisms of interaction, transport, allocation and storage of NPs in trees were found.
We demonstrated definitively that NPs enter into the tree stem through leaves faster than through roots in all of the
investigated tree species. |
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| Keywords: | Ag-NPs, pathway of uptake, Pinus sylvestris L., Populus nigra L., Quercus pubescens Willd. |
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| Year of publishing: | 2019 |
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| Number of pages: | 1251-1261 |
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| Numbering: | 7, 39 |
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| PID: | 20.500.12556/RUNG-5124-85cdb393-88fe-6b3a-312d-f3a174c3252e |
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| COBISS.SI-ID: | 5612283 |
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| DOI: | https://doi.org/10.1093/treephys/tpz046 |
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| NUK URN: | URN:SI:UNG:REP:DHMPM5QN |
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| Publication date in RUNG: | 20.04.2020 |
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| Views: | 4774 |
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| Downloads: | 0 |
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