Copper removal efficiency in a surface water and compartmentalization in the floating fern Salvinia minima
- Casares, Maria Victoria
- de Cabo, Laura Isabel
- Seoane, Rafael Santiago
- Fabrizio de Iorio, Alicia Rosa
DOIAbstract
In order to determine copper removal efficiency and compartmentalization in the free floating fern S. minima, a bioassay was performed in which plants were exposed to increasing copper concentrations in the range of 1 to 30 mg Cu L-1 for six days in Pilcomayo River surface water. S. minima accumulated the metal in a dose-dependent manner. Metal concentration was from 6.5 to 3.9 times higher in the submerged biomass in comparison to the aerial biomass in all treatments reflecting a poor mobility of copper between plant tissues. In both biomasses, most of the copper was localized in the extracellular compartment and increased lineally with increasing concentration of copper in water. The intracellular fraction increased following a polynomial...
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