摘要
实验主要研究培养基中不同Fe3+浓度对铜绿微囊藻生长的影响。试验采用0,10,100,1000,10000,30000 nmol/L6个不同Fe3+浓度培养处理,对铜绿微囊藻的生物量,叶绿素a质量浓度,培养基中N、P的含量等分别进行了测定,并通过扫描电镜观察了不同Fe3+浓度处理下铜绿微囊藻细胞的表面结构。结果显示,Fe3+浓度在0～1000 nmol/L范围内,铜绿微囊藻的生长受到抑制,而Fe3+浓度增加到30000 nmol/L时,在培养的前20天内促进了铜绿微囊藻细胞的生长,但随后生物量和叶绿素a的质量浓度突然下降。根据电子显微镜的照片分析,这个现象很可能是因为细胞死亡或自溶所致。试验的结果表明,介质中过高的Fe3+浓度可以加剧水环境的恶化。
Effect of Fe^3＋ on growth of Microcystis aeruginosa was investigated by various Fe^3＋ concentrations in culture media, including 0, 10, 100, 1,000, 10,000 and 30,000nmoUL respectively. Biomass, concentration of Chlorophyll a, uptake of N and P by Microcystis aeruginosa during incubation were measured. Superficial structures of Microcystis aeruginosa were also observed under scan electron microscope. Results showed that growth of Microcystis aeruginosa was restrained under lower Fe^3＋ concentration between 0 to 1,000nmol/L. However, under 30,000nmol/L Fe^3＋ concentration, growth of Microcystis aeruginosa was accelerated in the first 20days of incubation, following the biomass and concentration of Chlorophyll a represented a fast decrease. Photos of scan electron microscope implied that it may be due to death or autolyzing of algae cells. Results indicated that high Fe^3 ＋ concentration could accelerate the deterioration of aqueous environment.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2009年第1期35-39,共5页
Environmental Science & Technology
基金
扬州大学2007年科技创新立项资助项目
