Mn^(2+)对铜绿微囊藻生长和养分吸收的影响  

Effects of Mn^(2+) on the Growth of Microcystis aeruginosa and Uptake of Nnutrients

作　　者：刘静[1] 徐轶群[1] 盛海君[1] 封克[1] 

机构地区：[1]扬州大学环境科学与工程学院,江苏扬州225009

出　　处：《水生态学杂志》2009年第1期16-20,共5页Journal of Hydroecology

基　　金：广西科技攻关项目(桂科攻0428001-2)

摘　　要：在不同Mn2+浓度(0、10、100、1000、10000、30000nmol/L)条件下,研究了Mn2+对铜绿微囊藻的生长以及N、P、Mg等营养元素的吸收的影响。100nmol/L的Mn2+处理获得最大的生物量,30000nmol/L时的生物量最小;100nmol/LMn2+处理的铜绿微囊藻叶绿素a含量最高,30000nmol/LMn2+处理的叶绿素a含量最低;不同Mn2+浓度处理对铜绿微囊藻的N吸收影响不大,但明显影响P的吸收:100nmol/L的Mn2+处理培养基中P减少量是30000nmol/L的Mn2+处理组P减少量的5倍左右;过高的Mn2+浓度也影响了铜绿微囊藻对Mg2+的吸收。结果表明Mn2+浓度为100nmol/L时铜绿微囊藻在各个方面的表现最好。Mn is one of the essential trace elements for algae growth, and it functions in many physiological aspects in algae cell. However, effects of Mn on the growth of Microcystis aeruginosa were rarely studied. In this study, the biomass, chlorophyll a concentration of Microcystis aeruginosa and uptake of N, P and Mg during incubation were measured under six different Mn^2＋concentrations in culture medium （0, 10, 100, 1000, 10 000, 30 000 nmol/L） Results showed that the optimum Mn^2＋ concentration in medium for algae growth was 100 nmol/L, in which the highest biomass was obtained. In treatment of 30 000 nmol/L, the growth of algae was severely inhibited and the biomass was the lowest. Similar trend was observed for the concentration of chlorophyll a. No significant impacts of Mn^2＋ on the uptake of N were found in this study. However, the uptake of P by the algae responded strongly to Mn^2＋ concentration, and the reduction of P concentration in culture medium treated with 100 nmol/L was 5 times than with 30 000 nmol/L. High concentration ofMn^2＋ in culture medium also inhibited Mn^2＋ uptake by algae.

关 键 词：铜绿微囊藻 Mn2+ 生物量 养分吸收 

分 类 号：Q935[生物学—微生物学]