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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yan, Zhongzheng Li, Xiuzhen Chen, Jun Tam, Nora Fung-Yee |
| Description | Author Affiliation: Yan Z ( State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China); Li X ( State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China); Chen J ( State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, China); Tam NF ( Department of Biology and Chemistry, City University of Hong Kong, Hong Kong, China. Electronic address: bhntam@cityu.edu.hk.) |
| Abstract | Seedlings of Avicennia marina were exposed to single and combined metal treatments of cadmium (Cd) and copper (Cu) in a factorial design, and the combined toxicity of Cu and Cd was tested. The effects of the exogenous jasmonic acid (JA) on chlorophyll concentration, lipid peroxidation, Cd and Cu uptake, antioxidative capacity, endogenous JA concentration, and type-2 metallothionein gene (AmMT2) expression in seedlings of A. marina exposed to combined metal treatments were also investigated. A binary mixture of low-dose Cd (9 µmolL(-1)) and high-dose Cu (900 µmolL(-1)) showed toxicity to the seedlings, indicated by the significant augmentation in leaf malondialdehyde (MDA) and reduction in leaf chlorophylls. The toxicity of the combined metals was significantly alleviated by the addition of exogenous JA at 1 µmolL(-1), and the chlorophyll and MDA contents were found to be restored to levels comparable to those of the control. Compare to treatment with Cd and Cu only, 1 and 10 µmolL(-1) JA significantly enhanced the ascorbate peroxidase activity, and 10 µmolL(-1) JA significantly decreased the uptake of Cd in A. marina leaves. The relative expression of leaf AmMT2 gene was also significantly enhanced by 1 and 10 µmolL(-1) JA, which helped reduce Cd toxicity in A. marina seedlings. |
| File Format | HTM / HTML |
| ISSN | 01476513 |
| Volume Number | 113 |
| e-ISSN | 10902414 |
| Journal | Ecotoxicology and Environmental Safety |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2015-03-01 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Environmental Sciences Avicennia Drug Effects Cadmium Toxicity Copper Cyclopentanes Pharmacology Oxylipins Water Pollutants Growth & Development Metabolism Chlorophyll Drug Interactions Lipid Peroxidation Malondialdehyde Metallothionein Plant Leaves Seedling Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Pollution Health, Toxicology and Mutagenesis Public Health, Environmental and Occupational Health |
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