Ag nanoparticles enhancing Phaseolus vulgaris seedling development: understanding nanoparticle migration and chemical transformation across the seed coat
| Autor: | João Paulo Rodrigues Marques, Susilaine M. Savassa, Hiram Castillo-Michel, Hudson Wallace Pereira de Carvalho, Juan Reyes-Herrera, Ana Elena Pradas del Real |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Chemical transformation
biology Chemistry Materials Science (miscellaneous) technology industry and agriculture food and beverages Nanoparticle 02 engineering and technology 010501 environmental sciences 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences chemistry.chemical_compound Biotransformation Germination Seedling Seed treatment Food science Phaseolus 0210 nano-technology Dissolution 0105 earth and related environmental sciences General Environmental Science |
| Zdroj: | Environmental Science: Nano. 8:493-501 |
| ISSN: | 2051-8161 2051-8153 |
| DOI: | 10.1039/d0en00959h |
| Popis: | The increasing number of patents suggests that the use of nanoparticles (NPs) in agriculture will continue to grow in the future. Properties associated with nanosized objects might be desirable, but may pose a threat to the environment since the fate of nanomaterials is poorly understood. Seed treatment is an extensive practice to provide micronutrients and disease protection. This study investigates the effect of Ag2S NPs, Ag0 NPs, and AgNO3 (1, 100, and 1000 mg Ag per L) on the germination of Phaseolus vulgaris seeds and the mechanism of interaction in the seed coat. Ag treatments did not affect the germination rate. On the other hand, the development of seedlings was significantly improved by Ag2S NPs while AgNO3 showed a negative effect compared to the control (water). Silver from different sources was accumulated and biotransformed along the seed coat. Ag from the AgNO3 treatment was found as AgCl and bound to oxygen, and Ag0 NPs underwent oxidative dissolution forming thiolate complexes. On the other hand, Ag2S NPs did not show any detectable chemical changes. Silver distribution and speciation were investigated in the bean testa using μ-XRF and μ-XANES, while the macromolecular composition was assessed by ATR-FTIR. The Ag biotransformation depended on the source. For the FTIR results, it is possible to verify perturbations in the carbohydrate region as well as changes in the protein region. The combination of these results can contribute to building another step in the understanding of how nanoparticles can improve agricultural inputs and benefit food crops. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|