摘要
This study aims to assess the effective capacity of <i>Panicum</i><span> <i>maximum</i> </span>to accumulate cadmium (Cd), nickel (Ni) and lead (Pb). <i>P</i><span>. <i>maximum</i></span> observed in a greenhouse was subjected to 2 ppm of Cd, 50 ppm of Ni, 100 ppm of Pb contaminated soil and uncontaminated soil, </span></span><span><span><span style="font-family:"">for</span></span></span><span><span><span style="font-family:""> 120 days. Plant growth and biomass produced concentration of trace metals in soil and plant, bioaccumulation and transfer factors, location of potentially toxic elements in tissues and cells of plant ha</span></span></span><span><span><span style="font-family:"">ve</span></span></span><span><span><span style="font-family:""> been determined. Stem length and biomass produced by <i>P</i><span>. <i>maximum</i></span> were higher on the uncontaminated soil followed respectively by those of soil-contaminated by Pb, Cd and Ni. Bioaccumulation factors of trace metals were 8.93 (Pb), 8.47 (Ni) and 3.37 (Cd). Ni was more accumulated in shoot biomass (FT > 1), while Pb and Cd were concentrated in root biomass (FT </span></span></span><span><span><span style="font-family:""><</span></span></span><span><span><span style="font-family:""> 1). Pb is accumulated preferentially in endodermis (roots) and epidermis (leaves). As for Ni and Cd, they are concentrated in central cylinder of roots and in conductive bundles of leaves. At cellular level, Ni and Cd are mainly concentrated in intracellular compartments of leaves and roots, while Pb is strongly detected at cell walls.
This study aims to assess the effective capacity of <i>Panicum</i><span> <i>maximum</i> </span>to accumulate cadmium (Cd), nickel (Ni) and lead (Pb). <i>P</i><span>. <i>maximum</i></span> observed in a greenhouse was subjected to 2 ppm of Cd, 50 ppm of Ni, 100 ppm of Pb contaminated soil and uncontaminated soil, </span></span><span><span><span style="font-family:"">for</span></span></span><span><span><span style="font-family:""> 120 days. Plant growth and biomass produced concentration of trace metals in soil and plant, bioaccumulation and transfer factors, location of potentially toxic elements in tissues and cells of plant ha</span></span></span><span><span><span style="font-family:"">ve</span></span></span><span><span><span style="font-family:""> been determined. Stem length and biomass produced by <i>P</i><span>. <i>maximum</i></span> were higher on the uncontaminated soil followed respectively by those of soil-contaminated by Pb, Cd and Ni. Bioaccumulation factors of trace metals were 8.93 (Pb), 8.47 (Ni) and 3.37 (Cd). Ni was more accumulated in shoot biomass (FT > 1), while Pb and Cd were concentrated in root biomass (FT </span></span></span><span><span><span style="font-family:""><</span></span></span><span><span><span style="font-family:""> 1). Pb is accumulated preferentially in endodermis (roots) and epidermis (leaves). As for Ni and Cd, they are concentrated in central cylinder of roots and in conductive bundles of leaves. At cellular level, Ni and Cd are mainly concentrated in intracellular compartments of leaves and roots, while Pb is strongly detected at cell walls.
