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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Meng, De Kun Chen, Jian Yang, Zhi Min |
| Description | Country affiliation: China Author Affiliation: Meng de K ( Department of Biochemistry and Molecular Biology, College of Life Science, Nanjing Agricultural University, Nanjing 210095, China.) |
| Abstract | Carbon monoxide (CO) is a hazardous gaseous molecule, whose concentration in atmosphere is recently rising. CO also is an endogenous regulator of a variety of biological processes in animals and plants. However, whether CO regulates plant adaptation to Hg-contaminated environments is unknown. In this study, we investigated the effect of CO on biological responses of Indian mustard (Brassica juncea), a plant species frequently used for heavy metal accumulation, to mercury (Hg) toxicity. Exposure of B. juncea to Hg(II) triggered production of O(2)(-) and H(2)O(2) as well as peroxides. However, such an effect can be reversed by CO exposure. Plants treated with 0.2 mM CO accumulated less amounts of Hg and had improved root elongation. Treatment with CO reduced activities of superoxide dismutase and increased activities of catalase, ascorbate peroxidase and guaiacol peroxidase in Hg-treated plants. CO-mediated alleviation of Hg toxicity was closely related to the accumulated proline, an antioxidant and reduced non-protein thiols, a sulfhydryl-containing compound that has strong capability for chelating heavy metals. These results indicate that CO plays a crucial role in preventing the plant from Hg toxicity. |
| ISSN | 03043894 |
| Issue Number | 2-3 |
| Volume Number | 186 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-02-28 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Carbon Monoxide Pharmacology Mercury Compounds Toxicity Mustard Plant Drug Effects Ascorbate Peroxidases Catalase Chemistry Electrophoresis, Polyacrylamide Gel Environmental Restoration And Remediation Lipid Peroxidation Peroxidase Peroxidases Plant Roots Rna, Plant Genetics Reactive Oxygen Species Soil Pollutants Superoxide Dismutase Metabolism Journal Article Research Support, Non-u.s. Gov't Discipline Environmental Science Discipline Environmental Chemistry |
| Content Type | Text |
| Resource Type | Article |
| Subject | Environmental Chemistry Pollution Waste Management and Disposal Health, Toxicology and Mutagenesis Environmental Engineering |
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