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Hg2+胁迫对三种微藻生长和叶绿素荧光特性的影响
引用本文:李明,潘晓洁,邹怡,陈晓娟,万成炎.Hg2+胁迫对三种微藻生长和叶绿素荧光特性的影响[J].水生态学杂志,2012,33(2):96-99.
作者姓名:李明  潘晓洁  邹怡  陈晓娟  万成炎
作者单位:水利部中科院水工程生态研究所
基金项目:水利部948项目“藻类在线水体生态毒性监测系统”(合同号:200902);环境保护部水体污染控制与治理科技重大专项(2009ZX07528-003)
摘    要:研究了不同浓度的Hg2+胁迫不同时间(1~7 d)后,蛋白核小球藻(Chlorella pyrenoidosa)、斜生栅藻(Scenedesmus obliquus)和莱茵衣藻(Chlamydomonas reinhardtii)生长及叶绿素荧光特性的变化情况。测定的主要参数有光系统II(PSII)的最大光能转化效率(ΦM)、相对光合电子传递效率(rETR)、饱和光强(Ik)和细胞密度。试验结果表明,Hg2+胁迫下3种微藻的细胞密度和叶绿素荧光参数与Hg2+浓度、胁迫时间有一定的相关关系,细胞密度和叶绿素荧光各参数间有极显著的相关关系(P<0.01)。通过计算Hg2+对3种微藻不同胁迫时间的半抑制浓度(EC50),发现3种微藻对Hg2+的耐受性大小顺序为:斜生栅藻>莱茵衣藻>蛋白核小球藻。

关 键 词:微藻  Hg2+  叶绿素荧光  细胞密度
收稿时间:2011/8/29 0:00:00
修稿时间:2011/10/12 0:00:00

Effects of Hg2+ Exposure on the Growth and Chlorophyll Fluorescence of Three Microalgal Strains
Li Ming,pan xiao jie,zou yi,chen xiao juan and wan cheng yan.Effects of Hg2+ Exposure on the Growth and Chlorophyll Fluorescence of Three Microalgal Strains[J].Journal of Hydroecology,2012,33(2):96-99.
Authors:Li Ming  pan xiao jie  zou yi  chen xiao juan and wan cheng yan
Institution:The Institute of Hydroecology, Ministry of Water Resources & Chinese Academy of Sciences
Abstract:The present study investigated the growth and chlorophyll fluorescence characteristics of 3 microalgal strains(Chlorella pyrenoidosa,Scenedesmus obliquus and Chlamydomonas reinhardtii) under different Hg2+ concentrations and different durations(1-7 d).The main parameters including the maximal photochemical efficiency of PSII(ΦM),the relative electron transport rate(rETR),the saturation intensity(Ik)and cell density were determined.The results showed that the chlorophyll fluorescence and cell density of 3 microalgal strains all exhibit some correlations to Hg2+ concentration and exposure duration.While cell density has very significant positive correlations(P<0.01) to fluorescence parameters.Comparison of the EC50 values of different exposure durations among the 3 algal species indicated the ability of their tolerance to Hg2+ was S.obliquus>C.reinhardtii>C.pyrenoidosa.
Keywords:microalgae  Hg2+  chlorophyll fluorescence  cell density
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