The influence of radical architecture on cadmium bioaccumulation in the black mangrove, Avicennia germinans L
| Autor: | Victor Ceja-Moreno, Omar Zapata-Pérez, Daniel González-Mendoza, Rosa María Escobedo-GraciaMedrano, Gerardo Gold-Bouchot, M. Del-Rio, D. Valdés-Lozano |
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| Rok vydání: | 2007 |
| Předmět: |
Rhizosphere
Cadmium Environmental Engineering Plant Stems biology Chemistry Health Toxicology and Mutagenesis Verbenaceae Avicennia germinans Public Health Environmental and Occupational Health chemistry.chemical_element Bioconcentration General Medicine General Chemistry Root system biology.organism_classification Plant Roots Pollution Bioaccumulation Seeds Botany Environmental Chemistry Avicennia Mangrove |
| Zdroj: | Chemosphere. 67:330-334 |
| ISSN: | 0045-6535 |
| DOI: | 10.1016/j.chemosphere.2006.09.072 |
| Popis: | Two groups of Avicennia germinans plants with differences in the radical architecture were exposed under hydroponic conditions to 95 ppm of cadmium (Cd) for a period of 24 h. Later, Cd concentration in roots, stems and leaves was determined by graphite furnace atomic absorption spectrophotometry. Our results showed that, for both groups of plants, the roots accumulated higher concentration of Cd as compared to stems and leaves, though, the plants of group B displayed enhanced radical architecture, better growth performance, and lower Cd concentration as compared to plants of group A. In contrast, low values of leaves/roots Cd transportation index, and bioaccumulation factor were found in plants of group B. These results suggest that the higher radical architecture developed in plants of group B might better adjust the uptake of Cd as a result of an integrated network of multiple response processes for instances, production of organic acids, antioxidative replay, cell-wall lignification and/or suberization. Further studies will be focused in understanding the role of the radical system in mangrove plants with the rhizosphere activation and root adsorption to soil Cd under natural conditions. 2006 Elsevier Ltd. All rights reserved. |
| Databáze: | OpenAIRE |
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