The dynamics of heavy metals in plant-soil interactions |
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| Authors: | Sebastiá n D. Guala,Emma F. Covelo |
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| Affiliation: | a Departamento de Bioloxía Vexetal e Ciencia do Solo, Facultade de Bioloxia, Universidade de Vigo, Lagoas, Marcosende, 36310 Vigo, Pontevedra, Spain
b Universidad Nacional de General Sarmiento, Gutiérrez 1150, Los Polvorines, Buenos Aires, Argentina |
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| Abstract: | The effects of soil contamination by heavy metals are studied by a mathematical interaction model, validated by experimental results. The model relates the dynamics of uptake of heavy metals from soil to plants. The model successfully fitted the experimental data and made it possible to predict the threshold values of total mortality. Data are taken from soil with Cd, Cu and Zn treatments for alfalfa, lettuce, radish and Thlaspi caerulescens, measuring the concentrations in the aboveground biomass of plants. At low concentrations, the effects of heavy metals are moderate, and the dynamics seem to be linear. However, increasing concentrations exhibit nonlinear behaviors. |
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| Keywords: | Heavy metal uptake Interaction model Plant mortality Soil pollution |
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