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.
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
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)
