Following conclusions may be drawn from the results obtained
during present study: (1) Removal of heavy metals was enhanced
whenP. australisandT. latifoliawere grown in combination than
when grown alone, while,P. australis performed better thanT.
latifolia in monoculture. Rhizosphere of these plants provided the
substrate and supporting media for the growth of microorganisms,
which are the main sites of the heavy metals immobilization and
uptake by plants. When grown in combination the rhizosphere of
these plants was increased, which would further augment the cell
wall capability to absorb metals through immobilization.