不同浓度Mn^2＋对铜绿微囊藻的生长及其生物可利用性的影响  

Effects of Mn^(2+) concentrations on growth of Microcystis aeruginosa and its bioavailability of Mn^(2+)

作　　者：王海明[1] 王宁[1] 王晓蓉[1] 李玉成[2] 金相灿[3] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,江苏南京210093 [2]安徽大学生命科学学院,安徽合肥230039 [3]中国环境科学研究院,北京100012

出　　处：《环境污染与防治》2008年第1期13-16,共4页Environmental Pollution & Control

基　　金：国家自然科学基金资助项目(No.20607009);教育部科学技术重点项目(No.03079)

摘　　要：利用MA培养液进行藻类增长潜力(AGP)试验,考察了不同浓度Mn2+对铜绿微囊藻生长及其生物可利用性的影响。结果表明,Mn2+为0mg/L时,铜绿微囊藻生长受到很大抑制,叶绿素a含量较低;Mn2+为0.7~6.0mg/L时,铜绿微囊藻生长较快,叶绿素a含量都较高,并且相互差异不明显;Mn2+为12.0mg/L时,可能对铜绿微囊藻生长产生了毒性,生长受到抑制,且叶绿素a含量较低;Mn2+在藻类正常生长所需浓度范围内,其生物可利用性与溶液中Mn2+浓度呈正相关。The effects of Mn^2＋ concentration of the MA medium on growth of Microcystis aeruginosa were determined by the algal growth potential （AGP） test, The algal biomass was measured daily; its Chl-a content, the amount of Mn adsorbed on an algal and its Mn content were measured at the end of the test runs. When Mn^2＋ was absent in the MA medium, the growth of Microcystis aeruginosa was much slower than any test runs with available Mn^2＋. The algal growth in the medium containing 0.7-6.0 mg/Lof MnA^2＋ was normal; the Mn^2＋ concentration in this range had little on the growth of Microcystis aeruginosa and its Chl-a content. The slower growth and the lower Chl- a content of the test run with 12.0 mg/L of Mn^2＋ were the results of its toxic effect at this high concentration level. The algal uptake MnA^2＋ , as evidenced by the amount of Mn adsorbed on an algae and/or its Mn content, increased with increasing Mn^2＋ concentration of the MA medium.

关 键 词：铜绿微囊藻 Mn^+ AGP 叶绿素A 生物可利用性 

分 类 号：X52[环境科学与工程—环境工程]