Responses of antioxidative enzymes to accumulation of copper in a copper hyperaccumulator of Commoelina communis

Discovery of a copper hyperaccumulator is very important for phytoremediation of copper-contaminated soil. In the present study a link was established between the copper accumulation in hyperaccumulator and that in nonaccumulator species of Commelina communis and its responses of antioxidative enzym...

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Bibliographic Details
Published in:Archives of environmental contamination and toxicology 2004-08, Vol.47 (2), p.185-192
Main Authors: Wang, H, Shan, X.Q, Wen, B, Zhang, S, Wang, Z.J
Format: Article
Language:English
Subjects:
Accumulation
Animal, plant and microbial ecology
Antioxidants
Applied ecology
Ascorbate Peroxidases
Biological and medical sciences
Commelina - enzymology
Commelina communis
Commoelina communis
contaminants
Copper
Copper - pharmacokinetics
Copper - toxicity
copper hyperaccumulators
Ecotoxicology, biological effects of pollution
Enzymes
Free Radical Scavengers - pharmacology
Fundamental and applied biological sciences. Psychology
General aspects
hydroponics
hyperaccumulators
metal tolerance
Oxidation
Peroxidase - pharmacology
Peroxidases - pharmacology
Physiology
Phytoremediation
Plant Leaves - physiology
Plant tissues
Soil contamination
Soil Pollutants - pharmacokinetics
Soil Pollutants - toxicity
Superoxide Dismutase - pharmacology
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Summary:Discovery of a copper hyperaccumulator is very important for phytoremediation of copper-contaminated soil. In the present study a link was established between the copper accumulation in hyperaccumulator and that in nonaccumulator species of Commelina communis and its responses of antioxidative enzymes, including superoxide dismutase, guaiacol peroxidase, and ascorbate peroxidase. It was verified that copper exerted little physiological damage to copper hyperaccumulator species of Commelina communis at copper accumulation of >1,000 microg/g in dry leaf tissue. However, in nonaccumulator species of Commelina communis superoxide dismutase, guaiacol peroxidase, and ascorbate peroxidase were activated, and malondialdehyde content was increased, which were symptoms of physiological damage by copper intoxication. Therefore, antioxidative enzymes can be used as an indicator of copper toxicity before the visible symptoms can be observed.
ISSN:0090-4341
1432-0703
DOI:10.1007/s00244-004-2222-2