Iron plaque formation in the roots of Pistia stratiotes L.: importance in phytoremediation of cadmium.

Aquatic macrophytes play an important role in the removal of toxic metals from wastewater. Therefore, the induction of Fe plaque on the roots, and its consequences on Cd tolerance investigated in an aquatic macrophyte Pistia stratiotes L. The presence of Fe ion but not Fe resulted in Fe plaque formation.