Paper Title :Potential of Eichhornia Crassipes (MART.) Solms as a Mercury Phytoremediator
Author :Upma Arora, Renu Bhardwaj, A.K. Thukral
Article Citation :Upma Arora ,Renu Bhardwaj ,A.K. Thukral ,
(2018 ) " Potential of Eichhornia Crassipes (MART.) Solms as a Mercury Phytoremediator " ,
International Journal of Advances in Science, Engineering and Technology(IJASEAT) ,
pp. 43-47,
Volume-6, Issue-3, Spl. Iss-1
Abstract : Phytoremediation is a cost effective, environment friendly technology for the reclamation of habitats impregnated
with heavy metals. Eichhornia crassipes (Mart.) Solms is an aquatic macrophyte well known for its capacity to accumulate
heavy metals viz. Cd, Cu, Mn, Ni, Pb, Eu(III) and Hg. The present study focuses on understanding the mechanism of
mercury uptake by E. crassipes, its effects on the antioxidative defence system of the plant and to evaluate the
phytoremediation potential of E. crassipes. For different concentrations of mercury treatment given to the plants, the mercury
uptake has been observed to follow a dose and time dependent increase. Oxidative stress occurred in E. crassipes plants due
to mercury treatment as observed by increase in MDA content with the increase in mercury concentration. To remove the
reactive oxygen species generated as a result of mercury exposure, the antioxidative defence system of E. crassipes was
triggered and its components interacted in a coordinated way. Despite the increase in MDA content up to 1000 μg l-1, the
stimulation of most of the components of antioxidative defence system was limited to 100 μg l-1 concentration. CAT and
ascorbic acid played a role in detoxifying the effects of mercury being produced at highest concentration by showing the
enhancement up to 1000 μg l-1. The results of the present investigation thus suggest E. crassipes to be an accumulator of
mercury that can be used for reclamation of polluted aquatic habitats by periodic removal of the spent plants.
Keywords: phytoremediation, antioxidative defence, superoxide dismutase, catalase, ascorbate peroxidase, glutathione
reductase, DHAR, MDHAR, tocopherol, E. crassipes
Type : Research paper
Published : Volume-6, Issue-3, Spl. Iss-1
DOIONLINE NO - IJASEAT-IRAJ-DOIONLINE-13427
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Published on 2018-10-30 |
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