Predicting cadmium toxicity with the kinetics of phytochelatin induction in a marine diatom
文献类型：期刊论文
| 作者 | Zhang, Wei2; Wu, Yun3; Yuan, Yue; Yuan, Hezhong; Zhang, Li3 |
| 刊名 | AQUATIC TOXICOLOGY
 |
| 出版日期 | 2019 |
| 卷号 | 207页码:101 |
| 关键词 | Phytoplankton Trace metal Toxicity Phytochelatin kinetics Cadmium uptake |
| ISSN号 | 0166-445X |
| DOI | 10.1016/j.aquatox.2018.12.008 |
| 英文摘要 | Phytochelatin (PC) synthesis is thought to be a rapid and specific response to metal exposure in marine phy-toplankton, but its potential as a predictor of metal toxicity is far from conclusive. Thus this research examines the bioaccumulation, PC induction, and toxicity of Cadmium (Cd) in Thalassiosira weissflogii, a coastal diatom under varying nutrient conditions. Nitrogen limitation strongly inhibited Cd uptake and PC induction at the same [Cd2+] level, and increased metal sensitivity. Conversely, phosphorus limitation had little influence on Cd accumulation and PC induction, yet also enhanced metal effect on growth. Differential growth inhibitions were correlated with [Cd2+], intracellular Cd concentration, PC concentration, the kinetics of Cd uptake and PC induction, respectively. It was found that stronger interrelations existed between kinetic rates (both Cd uptake and PC synthesis) and Cd sensitivity than between the static concentrations (Cd and PC) and growth inhibition. Moreover, according to the calculated median inhibition concentration (1050), median effective uptake rate of Cd, as well as median effective induction rate of PCs, the latter two showed the smallest variation when nutrients were varied (1.4-1.9 fold). Our study set out the first step toward considering the use of PC synthesis kinetics to predict metal toxicity for phytoplankton. |
| 源URL | [http://ir.scsio.ac.cn/handle/344004/17914]  |
| 专题 | 南海海洋研究所_中科院海洋生物资源可持续利用重点实验室 |
| 作者单位 | 1.Guangzhou Univ, Key Lab Water Qual & Conservat Pearl River Delta, Minist Educ, Inst Environm Res Greater Bay, Guangzhou 510006, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China 3.NUIST, Jiangsu Key Lab Atmospher Environm Monitoring & P, Collaborat Innovat Ctr Atmospher Environm & Equip, Sch Environm Sci & Engn, Nanjing 210044, Jiangsu, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Wei,Wu, Yun,Yuan, Yue,et al. Predicting cadmium toxicity with the kinetics of phytochelatin induction in a marine diatom[J]. AQUATIC TOXICOLOGY,2019,207:101, 109. |
| APA | Zhang, Wei,Wu, Yun,Yuan, Yue,Yuan, Hezhong,&Zhang, Li.(2019).Predicting cadmium toxicity with the kinetics of phytochelatin induction in a marine diatom.AQUATIC TOXICOLOGY,207,101. |
| MLA | Zhang, Wei,et al."Predicting cadmium toxicity with the kinetics of phytochelatin induction in a marine diatom".AQUATIC TOXICOLOGY 207(2019):101. |
入库方式： OAI收割
来源：南海海洋研究所
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