Magnetite nanoparticle (NP) uptake by wheat plants and its effect on cadmium and chromium toxicological behavior
| Autor: | O.F. Mijangos-Ricardez, Ma. del Carmen A. González-Chávez, M.J. Silva-Silva, Sergio Martínez-Vargas, J. López-Luna, Fernando A. Solís-Domínguez, María del Carmen Cuevas-Díaz |
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| Rok vydání: | 2015 |
| Předmět: |
Chromium
Environmental Engineering 0211 other engineering and technologies chemistry.chemical_element 02 engineering and technology 010501 environmental sciences 01 natural sciences Plant Roots Citric Acid chemistry.chemical_compound Botany Environmental Chemistry Soil Pollutants Magnetite Nanoparticles Waste Management and Disposal Triticum 0105 earth and related environmental sciences Magnetite 021110 strategic defence & security studies Cadmium biology food and beverages biology.organism_classification Pollution Horticulture chemistry Germination Seedling Seedlings Bioaccumulation Shoot Toxicity Plant Shoots |
| Zdroj: | The Science of the total environment. 565 |
| ISSN: | 1879-1026 |
| Popis: | The aim of this work was to assess the uptake of citrate-coated magnetite nanoparticles (NPs) by wheat plants and its effect on the bioaccumulation and toxicity of individual and joint Cd(2+) and Cr(6+) levels. Seven-day assays were conducted using quartz sand as the plant growth substrate. The endpoints measured were seed germination, root and shoot lengths, and heavy metal accumulation. Magnetite exhibited very low toxicity, regardless of the wheat seedling NP uptake and distribution into roots and shoots. The seed germination and shoot length were not sensitive enough, while the root length was a more sensitive toxicity endpoint. The root length of wheat seedlings exposed to individual metals decreased by 50% at 2.67mgCd(2)(+)kg(-1) and 5.53mgCr(6+)kg(-1). However, when magnetite NPs (1000mgkg(-1)) were added, the root length of the plants increased by 25 and 50%. Cd(2+) and Cr(6+) showed similar and noninteractive joint action, but strongly impaired the wheat seedlings. In contrast, an interactive infra-additive or antagonistic effect was observed upon adding magnetite NPs. Thus, cadmium and chromium accumulation in vegetable tissues was considerately diminished and the toxicity alleviated. |
| Databáze: | OpenAIRE |
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