International Journal of Environmental Sciences

Volume 2 Issue 4 2012           Pages:2234- 2242

Physiological study of combined heavy metal stress on Hydrilla verticillata (l.f.) Royle

Author Information:

Alka Singh Department of Botany, Bareilly College, Bareilly-243006, U.P. India.

Chandra Shekhar Kumar Cell and Molecular Biology Lab, Department of Plant Science, M.J.P. Rohilkhand University, Bareilly-243006, U.P. India

Abha Agarwal Department of Botany, Bareilly College, Bareilly-243006, U.P. India.


Evaluation of toxicity of Lead and Cadmium was done by using aquatic plant Hydrilla verticillata at different durations of 3 day and 7 day under combined concentration of metals during summer season. Inhibition of growth of aquatic plant was measured as reduction in fresh biomass due to toxic effect created by metals. Reduction in chlorophyll content, protein and in vivo NR activity was measured when exposed to higher concentration i.e. 20.0 ppm Pb + 5.0 ppm Cd for 3 day but reduction was more evident during 7 day exposure whereas increase in carotenoid and proline content was observed with increase in combined metal concentration for both 3 day and 7 day durations. Study showed that higher combined metal concentration caused toxic effect which was duration dependent also.

Key Words: H.verticillata, Heavy metal,Biochemical parameters, Bioaccumulation

DOI: 10.6088/ijes.00202030106

© 2012 Copyright Alka Singh et al, licensee IPA.This is an open access article distributed under the Creative Commons Attribution License (2.0) which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The electronic version of the article can be downloaded below.

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