光合率作为藻类毒理测试指标

PHOTOSYNTHESIS RATE AS AN INDEX OF THE ALGAL TOXICITY TEST

以氧电极法的光合率作为藻类毒性测试指标。整个测试过程准确,简便,快速。能够随时测定受试毒物对藻类光合作用的效应,与常规毒性试验比较,测定时间由96h缩短到2h。灵敏度约提高了一倍,Cu^(2+)对光合作用的半数效应浓度(EC_(50))是0.105mg/L,比Cu^(2+)对藻的急性毒性试验的EC_(50)(0.204mg/L)少了一倍。

Photosynthetic rate of algae, expressed as oxygen evolution per unit chlorophyll a and one hour, was used as an index of chemical compounds toxicity. It is obvious that the toxicity can be measured exactly, briefly and quickly; and can be carried out anytime to detect the process of photosynthesis. In comparison with the routine acute toxicity test of algae, the temporal scale of whole test range is reduced from 96hr to 2 hr. And the sensitivity was promoted about one time. The 50% of Effective Concentration (EC50) of Cu2+ on algal photosynthesis is 0.105 mgl-1, only about one half of that in acute test of Cu2+ on algal toxicity .