Tags

Type your tag names separated by a space and hit enter

Response of antioxidant enzymes in coontail (Ceratophyllum demersum L.) plants under cadmium stress.
Environ Toxicol. 2008 Jun; 23(3):294-301.ET

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 Cd accumulation appears to help plants tolerate toxicity of Cd up to 5 microM.

Authors+Show Affiliations

Ecotoxicology and Bioremediation Group, National Botanical Research Institute, Rana Pratap Marg, Lucknow-226001, India.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

18214904

Citation

Mishra, Seema, et al. "Response of Antioxidant Enzymes in Coontail (Ceratophyllum Demersum L.) Plants Under Cadmium Stress." Environmental Toxicology, vol. 23, no. 3, 2008, pp. 294-301.
Mishra S, Srivastava S, Tripathi RD, et al. Response of antioxidant enzymes in coontail (Ceratophyllum demersum L.) plants under cadmium stress. Environ Toxicol. 2008;23(3):294-301.
Mishra, S., Srivastava, S., Tripathi, R. D., Dwivedi, S., & Shukla, M. K. (2008). Response of antioxidant enzymes in coontail (Ceratophyllum demersum L.) plants under cadmium stress. Environmental Toxicology, 23(3), 294-301. https://doi.org/10.1002/tox.20340
Mishra S, et al. Response of Antioxidant Enzymes in Coontail (Ceratophyllum Demersum L.) Plants Under Cadmium Stress. Environ Toxicol. 2008;23(3):294-301. PubMed PMID: 18214904.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Response of antioxidant enzymes in coontail (Ceratophyllum demersum L.) plants under cadmium stress. AU - Mishra,Seema, AU - Srivastava,Sudhakar, AU - Tripathi,R D, AU - Dwivedi,Sanjay, AU - Shukla,M K, PY - 2008/1/25/pubmed PY - 2008/8/30/medline PY - 2008/1/25/entrez SP - 294 EP - 301 JF - Environmental toxicology JO - Environ Toxicol VL - 23 IS - 3 N2 - 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 Cd accumulation appears to help plants tolerate toxicity of Cd up to 5 microM. SN - 1520-4081 UR - https://www.unboundmedicine.com/medline/citation/18214904/Response_of_antioxidant_enzymes_in_coontail__Ceratophyllum_demersum_L___plants_under_cadmium_stress_ L2 - https://doi.org/10.1002/tox.20340 DB - PRIME DP - Unbound Medicine ER -