Response of antioxidant enzymes in coontail (Ceratophyllum demersum L.) plants under cadmium stress

Environmental Toxicology
Seema MishraM K Shukla

Abstract

Cadmium (Cd) contamination of aquatic systems is of major concern since it is a nonessential element and hampers plant growth upon accumulation. The aim of this study was to investigate the Cd accumulation behavior of coontail plant, Ceratophyllum demersum L., toxicity induced and response of the antioxidant system. Plants were exposed to various concentrations of Cd (0-10 microM) for a period of 1-7 days. Accumulation of Cd was found to be a concentration duration dependent phenomenon. The maximum accumulation of Cd, 1293 microg g(-1) dw, was observed after 7 days at 10 microM. Plants showed significant stimulation of the activities of various antioxidant enzymes viz., superoxide dismutase (EC 1.15.1.1), ascorbate peroxidase (EC 1.11.1.11), guaiacol peroxidase (EC 1.11.1.7), catalase (EC 1.11.1.6), and glutathione reductase (EC 1.6.4.2) and tolerated toxicity of Cd up to moderate concentration of 5 microM. At 10 microM exposure, enzyme activities declined and plants experienced toxicity, which was evident by the significant decrease in the photosynthetic pigments and by increase in the levels of H(2)O(2), lipid peroxidation and ion leakage. In conclusion, modulation of antioxidant system in a coordinated manner in response to ...Continue Reading

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Citations

May 7, 2010·Protoplasma·Ragini SinghD Chakrabarty
Mar 8, 2012·Ambio·Anjuli SoodAmrik S Ahluwalia
Nov 28, 2012·Ecotoxicology and Environmental Safety·ZongBo QiuZhenLin Li
Mar 14, 2012·Journal of Hazardous Materials·Griselda PodazzaFernando E Prado
Aug 12, 2015·Physiology and Molecular Biology of Plants : an International Journal of Functional Plant Biology·Fauzia SiddiquiSudhakar Srivastava
Feb 6, 2017·Environmental Pollution·Pratibha TripathiChandra S Nautiyal
Feb 4, 2016·Metallomics : Integrated Biometal Science·Hendrik Küpper, Elisa Andresen
Aug 18, 2020·Toxicon : Official Journal of the International Society on Toxinology·Qing CaoLiuyan Yang

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