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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Prado, Fernando E. Arias, Marta Podazza, Griselda |
| Description | Country affiliation: Argentina Author Affiliation: Podazza G ( Instituto de Ecología, Fundación Miguel Lillo, Miguel Lillo 251, CP 4000, Tucumán, Argentina.) |
| Abstract | In order to assess implications of Cd-induced oxidative stress in roots of the citrus rootstock Citrumelo, seedlings were hydroponically exposed to two relatively realistic Cd concentrations during 7 days. Our results showed that increasing Cd concentrations in external solution were associated with higher Cd accumulations in roots. At 5µM Cd the accumulation of Cd in roots was over 70-f higher than in aerial part (stem+leaves). Malondialdehyde (MDA), superoxide radical (O(2)(*-)), hydrogen peroxide (H(2)O(2)) and lipoxygenase activity (LOX) increased in Cd-exposed roots, suggesting a metal-induced oxidative stress. The Cd treatment enhanced the activity of antioxidant enzymes superoxide dismutase (SOD), catalase (CAT) and guaiacol-type peroxidase (G-POD), as well as the content of secondary metabolites i.e. soluble phenolics (SPs) and lignin. Histochemical analyses of roots showed that Cd, H(2)O(2), (O(2)(*-)), lignin and G-POD displayed a similar location pattern. Almost all analyzed parameters showed a similar dynamic tendency with increases under 5µM Cd followed by decreases under 10µM Cd, suggesting that a complex coordinated Cd-defensive mechanism is operating in Citrumelo roots exposed to environmental realistic Cd concentrations. |
| ISSN | 03043894 |
| Volume Number | 215-216 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2012-05-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Citrus Drug Effects Plant Roots Soil Pollutants Toxicity Cadmium Metabolism Catalase Growth & Development Hydrogen Peroxide Malondialdehyde Oxidative Stress Peroxidase Phenols Plant Leaves Plant Stems Superoxide Dismutase Superoxides 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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