Synergetic enhancement toxicity of copper, cadmium and microcystin-LR to the Ceratophyllum demersum L
文献类型：期刊论文
| 作者 | Cao, Qing; Liu, Weijing; Gu, Yurong; Xie, Liqiang; Jiang, Weili; Gao, Yan; Yang, Liuyan |
| 刊名 | TOXICON
 |
| 出版日期 | 2020 |
| 卷号 | 186页码:151-159 |
| 英文摘要 | Heavy metals and microcystins commonly co-exist in water bodies with cyanobacteria, and have been shown to affect aquatic plants. However, their combined effects remain largely unknown. In this study, the toxic effects of copper (Cu) and cadmium (Cd) on Ceratophyllum demersum L. were characterized in the presence of microcystin-LR (MC-LR). The results showed that the bioaccumulation of MC-LR and Cu/Cd in C. demersum was significantly increased by the interaction between MC-LR and Cu/Cd. The combined toxicity assessment results suggested that the toxicities of Cu or Cd to C. demersum would be largely exacerbated by MC-LR, which could be the results of increased bioaccumulation of the pollutants. Cu, Cd and MC-LR, as well as their mixture, significantly decreased plant fresh weight and total chlorophyll content of C. demersum, especially at their high concentrations. The antioxidative system was activated to cope with the adverse effects of oxidative stress. Antioxidant enzyme activities were significantly stimulated by Cu, Cd and MC-LR, as well as their mixture. However, the decreased superoxide dismutase (SOD) and glutathione reductase (GR) activities were observed when exposed to relative high concentrations of Cu or Cd together with MC-LR of 5 mu g L-1. MC-LR brought more stress to the antioxidative system, which is another possible explanation for the synergistic effect. Our findings highlight increased ecological risks of the co-contamination of heavy metals and harmful cyanobacteria. |
| 源URL | [http://159.226.73.51/handle/332005/20264]  |
| 专题 | 中国科学院南京地理与湖泊研究所 |
| 推荐引用方式 GB/T 7714 | Cao, Qing,Liu, Weijing,Gu, Yurong,et al. Synergetic enhancement toxicity of copper, cadmium and microcystin-LR to the Ceratophyllum demersum L[J]. TOXICON,2020,186:151-159. |
| APA | Cao, Qing.,Liu, Weijing.,Gu, Yurong.,Xie, Liqiang.,Jiang, Weili.,...&Yang, Liuyan.(2020).Synergetic enhancement toxicity of copper, cadmium and microcystin-LR to the Ceratophyllum demersum L.TOXICON,186,151-159. |
| MLA | Cao, Qing,et al."Synergetic enhancement toxicity of copper, cadmium and microcystin-LR to the Ceratophyllum demersum L".TOXICON 186(2020):151-159. |
入库方式： OAI收割
来源：南京地理与湖泊研究所
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