Comparative effects of nanoscale zero-valent iron (nZVI) and Fe 2 O 3 nanoparticles on root hydraulic conductivity of Solanum lycopersicum L
| Autor: | Michael Komárek, Domingo Martínez-Fernández |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Zerovalent iron
Water transport biology Chemistry fungi food and beverages Plant physiology 02 engineering and technology Plant Science 010501 environmental sciences 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences Nutrient Hydraulic conductivity Agronomy Environmental chemistry Shoot Composition (visual arts) Solanum 0210 nano-technology Agronomy and Crop Science Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Environmental and Experimental Botany. 131:128-136 |
| ISSN: | 0098-8472 |
| DOI: | 10.1016/j.envexpbot.2016.07.010 |
| Popis: | The application of nanomaterials is progressively moving away from the experimental into practical areas. Nanoparticles have the potential to aggregate, and their interaction with plant root surfaces has been hypothesized to be a key factor in their phytotoxic effects. In an attempt to better explain their effects on plant physiology, this work investigated why nano zerovalent Fe (nZVI) and nano-maghemite (nFe2O3) affect differently the nutritional status of plants, through distinct effects on the root functionality. A hydroponic experiment, together with an incubation experiment, helped to relate the reduction of the root water uptake with the potential blockage of root nutrient uptake by each nanomaterial. The treatment with 100 mg L−1 nFe2O3 inhibited a 40% the root hydraulic conductivity (Lo) of tomato plants (Solanum lycopersicum L.), which could explain the reduction in the Mo and Zn concentrations in their shoots. On the other hand, compared to nFe2O3, nZVI seems to be less harmful since no effects on Lo were detected for the exposed roots, or regarding a shoot nutrient composition. So, even when iron nanoparticles are considered non-toxic to plants, their adherence to the root surface could explain some adverse effects in plants. |
| Databáze: | OpenAIRE |
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