title: Heavy metal tolerance in metal hyperaccumulator plant, Salvinia natans.
abstract: Metal tolerance capacity of Salvinia natans, a metal hyperaccumulator, was evaluated. Plants were exposed to 10, 30 and 50 mg L⁻¹ of Zn, Cd, Co, Cr, Fe, Cu, Pb, and Ni. Plant biomass, photosynthetic efficiency, quantum yield, photochemical quenching, electron transport rate and elemental (%C, H and N) constitution remained unaffected in Salvinia exposed to 30 mg L⁻¹ of heavy metals, except for Cu and Zn exposed plants, where significant reductions were noted in some of the measured parameters. However, a significant decline was noted in most of the measured parameters in plants exposed to 50 mg L⁻¹ of metal concentration. Results suggest that Salvinia has fairly high levels of tolerance to all the metals tested, but the level of tolerance varied from metal to metal.
authors.affiliation: Department of Genetics, University of Delhi South Campus, New Delhi 110021, India. bhupdhir@yahoo.co.in
authors.forename: B
authors.initials: B
authors.lastname: Dhir
authors.forename: S
authors.initials: S
authors.lastname: Srivastava
mesh_terms: D000222:Adaptation, Physiological; D018533:Biomass; D004579:Electron Transport; D029624:Ferns / Q000378:metabolism / Q000502:physiology*; D008670:Metals / Q000378:metabolism*; D010788:Photosynthesis
chemical_list: D008670:Metals