铜离子对铜绿微囊藻的急性毒性效应  

The Acute Toxicity of Copper Ion on Alga Microcystis aeruginosa

作　　者：张树林[1] 邢克智[1] 周艳[1] 

机构地区：[1]天津农学院水产科学系,天津市水产生态及养殖重点实验室,天津300384

出　　处：《水产科学》2007年第6期323-326,共4页Fisheries Science

基　　金：天津市自然科学基金资助项目(043611411);天津市水产生态及养殖重点实验室创新项目(2004BA29)

摘　　要：以BG11为基础培养基研究了实验室条件下重金属Cu^2＋在不同质量浓度下对铜绿微囊藻的急性毒性效应。试验结果表明，Cu^2＋对藻类的抑制效应随Cu^2＋质量浓度的增加而增加：质量浓度为0．3～1．2mg／L的Cu2^＋对铜绿微囊藻生长的抑制作用不显著，且48h后出现藻细胞密度反弹现象，杀藻效果不理想。质量浓度为1．5mg／L的Cu^2＋对铜绿微囊藻细胞产生很强的毒性，可有效抑制铜绿微囊藻的生长，96h时杀藻率高达97．4％，Chll_a含量抑制率达87．7％，光合放氧量明显降低，抑制率达83．3％，呼吸耗氧量明显增强。不同质量浓度Cu^2＋可影响铜绿微囊藻的生长及生理活动，1．5mg／L的Cu^2＋是抑制铜绿微囊藻生长的最有效质量浓度。Using BGll studied according to the of the M. aeruginosa un as base media, the toxic effects of heavy metal Cu^2＋ on alga Microcystis aeruginosa were change in growth, chlorophyll-a, photosynthesis release oxygen and respire exhaust oxygen der different Cu^2＋ concentrations in the experiment conditions. The results showed that the inhibition on growth increased along with the improvement of the concentrations of Cu^2＋. When Cu^2＋ levels ranging from 0.3 mg/L to 1.2 mg/L, it had little inhibition effects on M. aeruginosa, the density of some cultures increased again after 48h, the removing efficiency was not ideal, whereas Cu^2＋ at higher concentrations （1.5 mg/L） poisoned the cells and displayed the inhibitory effect on the growth of M. aeruginosa. 96 h after exposure the removing efficiency of alga populations was 97.4%, the chlorophyll-a inhibition efficiency was 87.7%, the photosynthesis release oxygen apparently went down, the inhibition efficiency was 83.3%, meanwhile the respire exhaust oxygen apparently enhanced. Different Cu^2＋ concentrations could affect the alga populations and physiological activities and Cu^2 ＋ （ 1.5 mg/L） is the most effect inhibition of M. aeruginosa.

关 键 词：CU^2+ 铜绿微囊藻 毒性 

分 类 号：Q949.2[生物学—植物学]