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Title:Silver nanoparticles enter the tree stem faster through leaves than through roots
Authors:Cocozza, Claudia (Author)
Perone, Annalisa (Author)
Giordano, Cristiana (Author)
Salvatici, Maria Cristina (Author)
Pignattelli, Sara (Author)
Raio, Aida (Author)
Schaub, Marcus (Author)
Sever, Kruno (Author)
Innes, John L. (Author)
Tognetti, Roberto (Author)
Cherubini, Paolo (Author)
Files:This document has no files. This document may have a phisical copy in the library of the organization, check the status via COBISS. Link is opened in a new window
Language:English
Work type:Not categorized (r6)
Tipology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
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.
Keywords:Ag-NPs, pathway of uptake, Pinus sylvestris L., Populus nigra L., Quercus pubescens Willd.
Year of publishing:2019
Number of pages:1251-1261
Numbering:39, 7
COBISS_ID:5612283 Link is opened in a new window
URN:URN:SI:UNG:REP:DHMPM5QN
DOI:https://doi.org/10.1093/treephys/tpz046 Link is opened in a new window
License:CC BY-NC-ND 4.0
This work is available under this license: Creative Commons Attribution Non-Commercial No Derivatives 4.0 International
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Title:Tree Physiology
Shortened title:Tree Physiol.
ISSN:1758-4469
Year of publishing:2019

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