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Influence of Ca/Mg Ratio on Phytoextraction Properties of Salix Viminalis I. The Effectiveness of Cd, Cu, Pb, and Zn Bioaccumulation and Plant Growth

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Phytoremediation and its efficiency—influenced by several factors—is prime concern in reduction of environment contamination with heavy metals. The aim of the study was to estimate in controlled conditions - in relation to the natural Ca/Mg ratio 4:1—the influence of different Ca/Mg ratios (1:1/4, 20:1, 1:10) on selected heavy metals (Cd, Cu, Pb, and Zn) accumulation efficiency shown by three morphological parts of Salix Viminalis ‘Cinamomea’ (cane bark, shoots and roots). Accumulation of heavy metals in experimental conditions was significantly Ca/Mg ratio dependent, and occurred in the following order: 1:10 > 4:1 > 20:1 > 1:1/4. The highest accumulation under 0.5 mM solutions (as compared to 0.1 mM) was noted for copper and zinc, and the lowest for cadmium. Biometric parameters of Salix Viminalis cuttings revealed the highest biomass productivity under 20:1 and 4:1 Ca/Mg ratios. In the case of shoot length increase, both metal concentration and kind of metal present in the solution were important. The results indicate that higher calcium ion concentration in solution (Ca/Mg 20:1) stimulates Salix Viminalis growth by 3 fold when compared to other Ca/Mg ratio. It can be an important factor in remediation of the environment with this plant.
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Keywords: Salix; accumulation; calcium; magnesium

Document Type: Research Article

Affiliations: 1: Poznan University of Life SciencesDepartment of Chemistry, Poznan, Poland 2: Poznan University of Life SciencesDepartment of Plant Physiology, Poznan, Poland 3: Polish Academy of Sciences,Institute of Plant Genetics, Poznan, Poland

Publication date: January 1, 2012

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