摘要
It is important to understand seasonal heavy metal accumulation in different parts of plants in order to develop the best phytoremediation practices for con- taminated 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 peri- ods. 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 con- centration 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 rec- ommend 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 concentra- tions of Zn in the above-ground parts will be maximal.
It is important to understand seasonal heavy metal accumulation in different parts of plants in order to develop the best phytoremediation practices for con- taminated 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 peri- ods. 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 con- centration 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 rec- ommend 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 concentra- tions of Zn in the above-ground parts will be maximal.