Antioxidative response of Lemna polyrrhiza L. to cadmium stress.

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dc.contributor.authorJohn, Riffaten_US
dc.contributor.authorAhmad, Parvaizen_US
dc.contributor.authorGadgil, Kasturien_US
dc.contributor.authorSharma, Satyawatien_US
dc.date.accessioned2007-07-03en_US
dc.date.accessioned2009-06-02T04:21:53Z
dc.date.available2007-07-03en_US
dc.date.available2009-06-02T04:21:53Z
dc.date.issued2007-07-03en_US
dc.description.abstractGrowth, lipid peroxidation, different antioxidative enzymes and metal accumulation were studied in Lemna polyrrhiza treated with different concentrations (1-40 ppm) of CdSO4. The growth of the plant was slightly enhanced with 1 ppm, while higher concentrations retarted growth and multiplication of fronds, the effect being concentration and dose dependant. Increase in malondialdehyde content was insignificant after the first week but a prolonged exposure led to significant (p < 0.05) increase of about 38% and 45% over the control in 20 and 30 ppm, respectively after four weeks. Catalase (EC 1.11.1.6; CAT) activity increased at low concentration, but it declined to 42% and 54% at 40 ppm after 6 and 30 days, respectively Superoxide dismutase (EC 1.15.1.1; SOD), ascorbate peroxidase (EC 1.11.1.11;APx) and glutathione reductase (EC 1.6.4.2) increased at both low as well at high concentrations, but a prolonged exposure to high concentration of Cd (40 ppm) led to significant (p < 0.05) decline in the mean activities of these antioxidant enzymes. Accumulation of Cd in biomass was concentration and time dependant However at high concentration of 40 ppm, Cd accumulation did not increase significantly (p < 0.05) with time. Increased activities of antioxidant enzymes in Cd treated plants suggest that metal tolerance in L. polyrrhiza might be associated to the changes of antioxidant enzymatic activities.en_US
dc.description.affiliationCentre for Energy Studies, Indian Institute of Technology Delhi, Hauz Khas, New Delhi-110 016, India.en_US
dc.identifier.citationJohn R, Ahmad P, Gadgil K, Sharma S. Antioxidative response of Lemna polyrrhiza L. to cadmium stress. Journal of Environmental Biology. 2007 Jul; 28(3): 583-9en_US
dc.identifier.urihttps://imsear.searo.who.int/handle/123456789/113718
dc.language.isoengen_US
dc.source.urihttps://www.geocities.com/j_environ_biol/en_US
dc.subject.meshAntioxidants --metabolismen_US
dc.subject.meshAraceae --drug effectsen_US
dc.subject.meshCadmium --metabolismen_US
dc.subject.meshCatalase --metabolismen_US
dc.subject.meshGlutathione Reductase --metabolismen_US
dc.subject.meshLipid Peroxidation --drug effectsen_US
dc.subject.meshMalondialdehyde --metabolismen_US
dc.subject.meshOxidative Stressen_US
dc.subject.meshPeroxidases --metabolismen_US
dc.subject.meshSuperoxide Dismutase --metabolismen_US
dc.titleAntioxidative response of Lemna polyrrhiza L. to cadmium stress.en_US
dc.typeJournal Articleen_US
dc.typeResearch Support, Non-U.S. Gov'ten_US
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