Chelate facilitated phytoextraction of Pb, Cd, and Zn from a lead-zinc mine contaminated soil by three accumulator plants.

EDTA does not appear to have a significant effect on APX activity, and its changes did not show a clear trend when different concentrations of this chelating agent were applied.

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The addition of EDTA did not show an obvious trend in the chlorophyll content of the studied species, however, its maximum amount was obtained in species V. speciosum and S. arabica at a level of 3 mmol kg −1 , and the lowest was related to the 5 mmol kg −1 (Fig. 3 ).

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