PHOTOSYNTHETIC AND CELLULAR TOXICITY OF CADMIUM IN CHLORELLA VULGARIS

doi:10.1002/etc.2362

CORC > 北京大学 > 城市与环境学院

	PHOTOSYNTHETIC AND CELLULAR TOXICITY OF CADMIUM IN CHLORELLA VULGARIS
	Ou-Yang, Hui-Ling ; Kong, Xiang-Zhen ; Lavoie, Michel ; He, Wei ; Qin, Ning ; He, Qi-Shuang ; Yang, Bin ; Wang, Rong ; Xu, Fu-Liu
刊名	environmental toxicology and chemistry
	2013
关键词	Cadmium Photosynthetic toxicity Cellular toxicity Flow cytometry Chlorella vulgaris BIOTIC LIGAND MODEL FRESH-WATER ALGA FLOW-CYTOMETRY CHLAMYDOMONAS-REINHARDTII CHLOROPHYLL FLUORESCENCE GREEN-ALGA COPPER ZINC PHYTOPLANKTON METALS
DOI	10.1002/etc.2362
英文摘要	The toxic effects of cadmium (Cd) on the green alga Chlorella vulgaris were investigated by following the response to Cd of various toxicity endpoints (cell growth, cell size, photochemical efficiency of PSII in the light or phi(PSII) , maximal photochemical efficiency or Fv/Fm, chlorophyll a fluorescence, esterase activity, and cell viability). These toxicity endpoints were studied in laboratory batch cultures of C. vulgaris over a long-term 96-h exposure to different Cd concentrations using flow cytometry and pulse amplitude modulated fluorometry. The sequence of sensitivity of these toxicity endpoints was: cell yield >> phi(PSII) approximate to esterase activity>Fv/Fm>chlorophyll a fluorescence approximate to cell viability. It is shown that cell apoptosis or cell death only accounted for a minor part of the reduction in cell yield even at very high algistatic free Cd2+ concentrations, and other mechanisms such as blocked cell divisions are major contributors to cell yield inhibition. Furthermore, cadmium may affect both the electron donors and acceptors of the electron transport chain at high free Cd2+ concentration. Finally, the resistance of cells to cell death was size-dependent; medium-sized cells had the highest toxicity threshold. The present study brings new insights into the toxicity mechanisms of Cd in C. vulgaris and provides a detailed comparison of the sensitivity of various Cd toxicity endpoints. Environ Toxicol Chem 2013;32:2762-2770. (c) 2013 SETAC; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000326916800014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Environmental Sciences; Toxicology; SCI(E); EI; PubMed; 4; ARTICLE; 12; 2762-2770; 32
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/160599]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Ou-Yang, Hui-Ling,Kong, Xiang-Zhen,Lavoie, Michel,et al. PHOTOSYNTHETIC AND CELLULAR TOXICITY OF CADMIUM IN CHLORELLA VULGARIS[J]. environmental toxicology and chemistry,2013.
APA	Ou-Yang, Hui-Ling.,Kong, Xiang-Zhen.,Lavoie, Michel.,He, Wei.,Qin, Ning.,...&Xu, Fu-Liu.(2013).PHOTOSYNTHETIC AND CELLULAR TOXICITY OF CADMIUM IN CHLORELLA VULGARIS.environmental toxicology and chemistry.
MLA	Ou-Yang, Hui-Ling,et al."PHOTOSYNTHETIC AND CELLULAR TOXICITY OF CADMIUM IN CHLORELLA VULGARIS".environmental toxicology and chemistry (2013).