It is important to understand seasonal heavy metal accumulation in different parts of plants in order to develop the best phytoremediation practices for contaminated soils. For this purpose we exposed, 1 year old A. victoriae seedlings to ZnSO4 in 4 different concentrations: 0, 50, 250 and 500 mg Zn L-1 for 45 days over two growing seasons. Subsequently, bioaccumulation of Zn in different plant tissues (roots, shoots and leafs) was assessed by Atomic Absorption Spectroscopy (AAS) for two periods. In addition, various growth attributes (dry biomass, shoot and root lengths, plant appearance) and functional traits (leaf area, chlorophyll a, b and total) were measured. The accumulation of Zn was influenced by the Zn concentration in the growth medium and the number of growing seasons. The amounts of Zn concentrated in the root tissues might indicate A. victoriae as a good option for phytostabilization of soils contaminated by Zn. We recommend that if A. victoriae is used for phytoextraction purposes, then it should be harvested at the end of the first growing season (fall) because at this time the concentrations of Zn in the above-ground parts will be maximal.
کلید واژگان :Heavy metal, Phytoremediation, Phytostabilization, Phytoextraction
ارزش ریالی : 600000 ریال
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