不同形态Fe对铜绿微囊藻生长及其生物可利用性的影响  

Effects of Different Forms of Iron on Growth of Microcystis aeruginosa and Bioavailability of Iron

作　　者：王海明[1] 王宁[2] 袁信芳[2] 耿金菊[2] 李玉成[1] 王晓蓉[2] 

机构地区：[1]安徽大学生命科学学院,安徽合肥230039 [2]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

出　　处：《农业环境科学学报》2007年第3期1029-1032,共4页Journal of Agro-Environment Science

基　　金：国家自然科学基金项目(20607009);教育部科学技术重点项目(03079);国家重点基础研究发展规划项目(2002CB412304)

摘　　要：室内利用MA培养液进行藻类增长潜力(AGP)试验,考察了不同有机配体(EDTA、NTA和DTPA)与Fe3+形成的配合物对铜绿微囊藻生长的影响。结果表明,Fe-EDTA、Fe-NTA和Fe-DTPA均能显著促进铜绿微囊藻的生长,提高Fe的生物可利用性,但三者之间没有表现出明显差异;Fe-NTA能显著提高叶绿素a含量,Fe-EDTA和Fe-DTPA对提高叶绿素a含量不明显,3种有机配合态Fe对铜绿微囊藻叶绿素a含量影响大小为Fe-NTA>Fe-DTPA、Fe-EDTA;Fe的有机配合态比羟基配合态更有利于促进铜绿微囊藻的生长和吸收利用。The effects of different complexes formed by Fe^3＋ and organic ligands （EDTA, NTA and DTPA） in MA medium on growth of Microcystis aeruginosa were studied in laboratory. Use MINTEQ procedure, calculate the concentrations of EDTA, NTA and DTPA which made all of Fe^3＋ complexed in each solution, add the proper concentrations of three organic ligands in test solutions respectively, inoculate Microcystis aeruginosa and experimentize algal growth potential （AGP） test. We mensurated the daily biomass of Microcystis aeruginosa, the content of Microcystis aeruginosa＇s Chl-a and the distribution of iron at the end of cultivation in each group. The results showed that： compared with the control group, all of three organic complexes of iron promoted the growth of Microcystis aeruginosa and enhanced the bioavailability of iron obviously, but there was no obvious difference among these groups; Fe-NTA enhanced the content of Microcystis aeruginosa＇ s Chl-a obviously at the end of cultivation, synchronously Fe-EDTA and Fe-DTPA did not. The effect extent of three organic complexes of iron on the content ofMicrocystis aeruginosa＇ s Chl-a at the end of cuhivation was： Fe-NTA 〉 Fe-DTPA, Fe-EDTA; On promoting the growth of Microcystis aeruginosa and enhancing the bioavailability of iron, organic complex forms of iron were more effective than hydroxy complex form.

关 键 词：铜绿微囊藻 不同Fe形态 AGP 叶绿素A 生物可利用性 

分 类 号：X172[环境科学与工程—环境科学]