Quantitative Relationship between Cadmium Uptake and the Kinetics of Phytochelatin Induction by Cadmium in a Marine Diatom

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Quantitative Relationship between Cadmium Uptake and the Kinetics of Phytochelatin Induction by Cadmium in a Marine Diatom
	Wu, Yun; Guo, Zhiqiang; Zhang, Wei; Tan, Qiaoguo; Zhang, Li; Ge, Xinlei; Chen, Mindong
刊名	SCIENTIFIC REPORTS
	2016
卷号	6 页码:35935
通讯作者	Zhang, L (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China.
英文摘要	Heavy metals activate the synthesis of phytochelatins (PCs), while the induced PCs might affect metal uptake via chelating intracellular free metals. However, the relationship of PCs to metal uptake is poorly understood. In this study, we examined the kinetics of cadmium (Cd) accumulation and the synthesis of PCs in a marine diatom, Thalassiosira weissflogii, under different irradiance levels. Irradiance alone could not change the concentrations of PCs in the Cd-free treatments, while higher irradiance accelerated the induction of intracellular PCs at the same [Cd2+] level. PC-SH (2 x PC2 + 3 x PC3 + 4 x PC4) was bound with Cd at a stoichiometric ratio of 2 to 49 in our short-term uptake experiments, indicating that PC induction is sufficient to serve as the first line of defense against Cd stress. A positive linear correlation between the induction rate of PCs and the Cd uptake rate was observed, while the ratio of the PC content to intracellular Cd varied greatly when the irradiance was increased several fold. Because metal uptake has been successfully used in predicting acute metal toxicity, our findings are helpful for understanding the role of PCs in metal detoxification and developing PCs as biomarkers for metal sensitivity.
学科主题	Science & Technology - Other Topics
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15272]
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
推荐引用方式 GB/T 7714	Wu, Yun,Guo, Zhiqiang,Zhang, Wei,et al. Quantitative Relationship between Cadmium Uptake and the Kinetics of Phytochelatin Induction by Cadmium in a Marine Diatom[J]. SCIENTIFIC REPORTS,2016,6:35935.
APA	Wu, Yun.,Guo, Zhiqiang.,Zhang, Wei.,Tan, Qiaoguo.,Zhang, Li.,...&Chen, Mindong.(2016).Quantitative Relationship between Cadmium Uptake and the Kinetics of Phytochelatin Induction by Cadmium in a Marine Diatom.SCIENTIFIC REPORTS,6,35935.
MLA	Wu, Yun,et al."Quantitative Relationship between Cadmium Uptake and the Kinetics of Phytochelatin Induction by Cadmium in a Marine Diatom".SCIENTIFIC REPORTS 6(2016):35935.