BDE-47对2种海洋微藻光合特性的影响  

Efects of BDE-47 on the chlorophyll fluorescence parameters of two species of marine microalgae

作　　者：李卓娜[1] 孟范平[1] 赵顺顺[1] 于腾[1] 

机构地区：[1]中国海洋大学海洋环境与生态教育部重点实验室,山东青岛266100

出　　处：《中国环境科学》2010年第2期233-238,共6页China Environmental Science

基　　金：中国海洋大学引进人才科研启动经费项目(HD19990016)

摘　　要：研究了不同浓度的2,2′,4,4′-四溴联苯醚(BDE-47)对2种海洋微藻的光合特性的影响.结果表明,在试验所设定的浓度范围内(0.1～2.5μg/L),海水小球藻和赤潮异弯藻的PSII最大光能转化效率(Fv/Fm)、光化学淬灭系数(qP)未受到显著抑制,表明2种微藻PSII反应中心在试验过程中未受到损伤.当BDE-47浓度为2.5μg/L时,海水小球藻的PSII潜在活性(Fv/Fo)、PSII实际光能转化效率(φPSII)和光合电子传递效率(ETR)在96h受到显著抑制,而赤潮异湾藻的3个参数在暴露期间均未受到抑制,表明赤潮异湾藻对BDE-47的耐受性强于海水小球藻.各叶绿素荧光参数中,Fv/Fo、φPSII、ETR更适合作为指示海洋环境中BDE-47污染水平的生物标志物.Effects of 2,2＇,4,4＇-tetrabrominated biphenyl ether（BDE-47） on photosynthetic characteristics of two marine microalgae were comprehensively investigated.The results showed that no significant inhibition of maximal photochemical efficiency of PSII（Fv/Fm）,photochemical quenching（qP） of Chlorella sp.and Heterosigam akshiwo were determined at the concentration of 0.1～2.5μg/L,which meant that BDE-47 didn＇t cause damage to PSII reaction center of the two algae.At the dose of 2.5 μg/L PSII potential fluorescence efficiency（Fv/Fo）,actual photochemical efficiency of PSII（φPSII） and electron transport rate（ETR） of Chlorella sp..were inhibited distinctly after exposed to BDE-47 for 96h.And φPSII,Fv/Fo and ETR of Heterosigam akashiwo,weren＇t observed inhibition at the BDE-47 concentration of 2.5 μg/L,which revealed that this microalgae was more tolerant than Chlorella sp..Among all of chlorophyll fluorescence parameters,Fv/Fo,φPSII and ETR are more suitable to be used as biomarkers for evaluation of pollution level of BDE-47 in marine environment.

关 键 词：2 2′ 4 4′-四溴联苯醚(BDE-47) 微藻 叶绿素荧光 

分 类 号：X503.2[环境科学与工程—环境工程]