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Hosseinifard M, Jurga N, Brandmeier JC, Farka Z, Hlaváček A, Gorris HH, Grzyb T, Ekner-Grzyb A. Influence of surface modification and size of lanthanide-doped upconverting nanoparticles on wheat seedlings. CHEMOSPHERE 2024; 347:140629. [PMID: 37949184 DOI: 10.1016/j.chemosphere.2023.140629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2023] [Revised: 11/03/2023] [Accepted: 11/04/2023] [Indexed: 11/12/2023]
Abstract
In recent years, nanotechnology has found widespread applications in environmental monitoring, medical applications, plant fertilisers, cosmetics and others. Therefore, it is important to study nanomaterials' influence and subsequent risks to the environment and organisms (from production to disposal). Therefore, in the present study, the toxic effects of two surface modifications (poly (ethylene glycol)-neridronate, PEG-Ner and poly (acrylic acid), PAA) in comparison to unmodified, 26 nm- and 52 nm-sized core@shell lanthanide-doped upconverting nanoparticles (UCNPs, NaYF4:Yb3+,Er3+@NaYF4) were analysed. Wheat seedlings (Triticum aestivum L.) were chosen as a model organism since this species is one of the most widely cultivated crops. The influence of UCNPs (at concentrations of 0, 10, 50, and 100 μg/mL) on germination percentage, germination rate and growth was studied based on morphological parameters such as root number, root and hypocotyl length, and root and hypocotyl mass. In addition, an assay based on Evans blue staining was conducted to analyse damaged cell membranes and cell death. The type, size and concentration of UCNPs influenced the growth but not the germination of wheat. 52-nm-sized ligand-free UCNPs and the 26-nm-sized UCNPs/PAA decreased plant growth. Moreover, the ligand-free 26-nm-sized UCNPs interacted with the root cell membranes of seedlings. No significant changes were observable regarding viability (tetrazolium chloride reduction assay), oxidative stress and electrolyte leakage from root cells in plants incubated with ligand-free 26-nm-sized UCNPs. Overall, we have shown that the ligand-free UCNPs (of both sizes) had the strongest toxic effect; PAA-modified UCNPs were toxic only at smaller sizes and PEG-Ner-modified UCNPs had no toxic impact. Therefore, PEG-Ner was identified as the safest surface compound among the UCNPs investigated in the study, which may neutralise the harmful effects of nanoparticles on plants.
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Affiliation(s)
- Marjanossadat Hosseinifard
- Adam Mickiewicz University, Poznań, Institute of Experimental Biology, Faculty of Biology, Department of Plant Ecophysiology, Poznań, Poland; University of Tehran, Faculty of Agricultural Technology (Aburaihan), Department of Agronomy and Plant Breeding Sciences, Imam Reza Boulevard, Tehran, Iran
| | - Natalia Jurga
- Adam Mickiewicz University, Poznań, Faculty of Chemistry, Department of Rare Earths, Poznań, Poland
| | - Julian C Brandmeier
- Masaryk University, Faculty of Science, Department of Biochemistry, Brno, Czech Republic; University of Regensburg, Institute of Analytical Chemistry, Chemo- and Biosensors, Regensburg, Germany
| | - Zdeněk Farka
- Masaryk University, Faculty of Science, Department of Biochemistry, Brno, Czech Republic
| | - Antonín Hlaváček
- Institute of Analytical Chemistry of the Czech Academy of Sciences, Brno, Czech Republic
| | - Hans H Gorris
- Masaryk University, Faculty of Science, Department of Biochemistry, Brno, Czech Republic
| | - Tomasz Grzyb
- Adam Mickiewicz University, Poznań, Faculty of Chemistry, Department of Rare Earths, Poznań, Poland
| | - Anna Ekner-Grzyb
- Adam Mickiewicz University, Poznań, Institute of Experimental Biology, Faculty of Biology, Department of Plant Ecophysiology, Poznań, Poland.
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Ekner-Grzyb A, Jurga N, Venâncio C, Grzyb T, Grześkowiak BF, Lopes I. Ecotoxicity of non- and PEG-modified lanthanide-doped nanoparticles in aquatic organisms. AQUATIC TOXICOLOGY (AMSTERDAM, NETHERLANDS) 2023; 259:106548. [PMID: 37130483 DOI: 10.1016/j.aquatox.2023.106548] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/18/2023] [Revised: 04/18/2023] [Accepted: 04/25/2023] [Indexed: 05/04/2023]
Abstract
Various types of nanoparticles (NPs) have been widely investigated recently and applied in areas such as industry, the energy sector, and medicine, presenting the risk of their release into the environment. The ecotoxicity of NPs depends on several factors such as their shape and surface chemistry. Polyethylene glycol (PEG) is one of the most often used compounds for functionalisation of NP surfaces, and its presence on the surfaces of NPs may affect their ecotoxicity. Therefore, the present study aimed to assess the influence of PEG modification on the toxicity of NPs. As biological model, we chose freshwater microalgae, a macrophyte and invertebrates, which to a considerable extent enable the assessment of the harmfulness of NPs to freshwater biota. SrF2:Yb3+,Er3+ NPs were used to represent the broad group of up-converting NPs, which have been intensively investigated for medical applications. We quantified the effects of the NPs on five freshwater species representing three trophic levels: the green microalgae Raphidocelis subcapitata and Chlorella vulgaris, the macrophyte Lemna minor, the cladoceran Daphnia magna and the cnidarian Hydra viridissima. Overall, H. viridissima was the most sensitive species to NPs, which affected its survival and feeding rate. In this case, PEG-modified NPs were slightly more toxic than bare ones (non-significant results). No effects were observed on the other species exposed to the two NPs at the tested concentrations. The tested NPs were successfully imaged in the body of D. magna using confocal microscopy; both NPs were detected in the D. magna gut. The results obtained reveal that SrF2:Yb3+,Er3+ NPs can be toxic to some aquatic species; however, the structures have low toxicity effects for most of the tested species.
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Affiliation(s)
- Anna Ekner-Grzyb
- Department of Plant Ecophysiology, Faculty of Biology, Adam Mickiewicz University, Poznań, Poland.
| | - Natalia Jurga
- Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland
| | - Cátia Venâncio
- CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal
| | - Tomasz Grzyb
- Department of Rare Earths, Faculty of Chemistry, Adam Mickiewicz University, Poznań, Poland
| | | | - Isabel Lopes
- CESAM & Department of Biology, University of Aveiro, Aveiro, Portugal
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Toxicity Assessment and Control of Early Blight and Stem Rot of Solanum tuberosum L. by Mancozeb-Loaded Chitosan–Gum Acacia Nanocomposites. J Xenobiot 2022; 12:74-90. [PMID: 35466214 PMCID: PMC9036208 DOI: 10.3390/jox12020008] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 03/28/2022] [Accepted: 04/12/2022] [Indexed: 12/23/2022] Open
Abstract
Biopolymers such as chitosan and gum acacia are used for nanotechnological applications due to their biosafety and ecofriendly nature. The commercial fungicide mancozeb (M) was loaded into chitosan–gum acacia (CSGA) polymers to form nanocomposite (NC) CSGA-M (mancozeb-loaded) measuring 363.6 nm via the ionic gelation and polyelectrolyte complexation method. The physico-chemical study of nano CSGA-M was accomplished using dynamic light scattering (DLS), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Nano CSGA-M-1.0 (containing 1.0 mg/mL mancozeb) at 1.5 ppm demonstrated a maximum inhibition (83.8 ± 0.7%) against Alternaria solani, while Sclerotinia sclerotiorum exhibited a 100% inhibition at 1.0 and 1.5 ppm through the mycelium inhibition method. Commercial mancozeb showed an inhibition of 84.6 ± 0% and 100%, respectively, for both fungi. In pot house conditions, NCs were found to exhibit good antimicrobial activity. Disease control efficiency (DCE, in %) in pathogen-treated plants for CSGA-M-1.0 was 64.6 ± 5.0 and 60.2 ± 1.4% against early blight and stem rot diseases, respectively. NCs showed lower cytotoxicity than commercial mancozeb at the given concentration. In conclusion, both in vitro and in vivo antifungal efficacy for nano CSGA-M was found to be quite comparable but less toxic than mancozeb to Vero cell lines; thus, in the future, this formulation may be used for sustainable agriculture.
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