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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Yang, Liuyan Jiang, Jinlin Song, Rui Wang, Xiaorong Gu, Xueyuan |
| Description | Author Affiliation: Jiang J ( State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, 22 Hankou Road, Nanjing 210093, PR China.) |
| Abstract | Microcystins produced by cyanobacteria in the aquatic environment are a potential risk to aquatic plants. In the present study, the uptake of microcystin-LR (MC-LR) and related physiological and biochemical effects on Vallisneria natans (Lour.) Hara were investigated at concentrations of 0.1-25.0 µg L(-1). Results showed that O(2)(-) intensity was significantly induced at 1.0 µg L(-1) and reached a maximum level at 5.0 µg L(-1). Superoxide dismutase (SOD) and peroxidase (POD) were induced with increasing MC-LR concentrations as an antioxidant response. Catalase (CAT) was significantly induced while GSH/GSSG (reduced/oxidized glutathione) ratio was significantly reduced at 0.1 µg L(-1). The induction of glutathione S-transferase (GST) and inhibition of GSH revealed that GSH was involved in the detoxification of MC-LR in plants. Oxidative damage was evidenced by the significant increase of malondialdehyde content at 1.0 µg L(-1). A pigment pattern change and a series of significant ultrastructural alterations were also observed due to MC-LR exposure. The lowest non-effect concentration of MC-LR for V. natans at the subcellular and molecular level is around 0.5 µg L(-1). These results imply that even at relatively low MC-LR concentrations the aquatic plants may still suffer a negative ecological impact. |
| ISSN | 03043894 |
| Issue Number | 1-3 |
| Volume Number | 190 |
| e-ISSN | 18733336 |
| Journal | Journal of Hazardous Materials |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2011-06-15 |
| Publisher Place | Netherlands |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Mesophyll Cells Ultrastructure Microcystins Pharmacology Oxidative Stress Drug Effects Plant Cells Carcinogens Dose-response Relationship, Drug Glutathione Metabolism Glutathione Transferase Peroxidase Superoxide Dismutase 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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