Metal Oxide Nanoparticles (Tio₂, Zno, and Fe₂O₃) Change the Functional Groups, but not the Plant Tissue Content of Common Bean Plants Grown in a Greenhouse

Abstract

The impact of nanoparticles (NPs) on the morphological characteristics, functional groups, and chemical and microstructural features of plant tissues were evaluated using common bean (Phaseolus vulgaris L.) plants. Beans plants were grown for 90 days in an agricultural soil amended with TiO 2 , ZnO, and Fe 2 O 3 NPs at 150 or 300 mg kg -1 . Controls consisted of soil without NPs amendments. After 60 days of sowing (DAS), TiO 2 NPs significantly reduced stem and root length compared to control treatments. Additionally, changes were observed in the FTIR-ATR spectra signals, mainly in the root spectra at 30 and 90 DAS. Significant differences were observed in the different plant structures regarding Ti, Zn, and Fe absorption and accumulation. A higher accumulation of Ti was observed in the roots at 90 DAS. Moreover, plants had a higher accumulation of Zn and Fe in leaves, stems, and roots when grown in soil amended with ZnO or Fe 2 O 3 NPs, respectively, at 30 and 90 DAS. In the microstructural analysis of tissue showed no evidence of absorption or translocation of NPs. Therefore, the accumulation of ionic forms of Ti, Zn, and Fe in the plant can be explained by the dissociation and dissolution of the NPs in the rhizosphere, facilitating their adsorption.

Ag-NP-Decorated Carbon Nanostructures: Synthesis, Characterization, and Antimicrobial Properties

“…Specifically, the morphology reported in the case of E. coli was necessary to cover the cell wall with Trump’s solution, as reported to biological material by Sarabia-Castillo et al, to fix the bacteria on the holder and take the images under a lower accelerating voltage of 5 kV. 28 On the other hand, all images of Ag/rGO, Ag/GNPs, and E. coli covered with these microbicide agents were obtained by SEM under an accelerating voltage of 10 kV.…”

Potential Antifungal and Antimicrobial Effects of Nano Zinc Oxide Particles Obtained from <i>Cymbogobon citratus</i> Leaf Extract Using Green Technology

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