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《Marine Sciences》 2001-10
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TOXICITY AND BIOACCUMULATION OF GERMANIUM IN TWO MICROALGAE Spirulina platensis AND Dunaliella salina

ZHU You-fang1 WANG Da-Zhi2(1Putian Fisheries Scientific Research Institute, 351100) (2Key Lab. for Marine Environmental Science of Ministry of Education, Xiamen University 361005)  
The toxicity and bioaccumulation of germanium were investigated in two microalgae: Spirulina platensis and Dunaliella salina in culture. Germanium was more toxic to S.platensis than to D.salina.Lower concentrations of germanium within the culture germanium concentration, the amount of germanium absorbed by S.platensis did not increase with the added germanium concentration,and germanium well distributed in cells and showed dose effect. In D.salina, total germanium concentration increased with the added germanium concentraion,most of germanium was associated with proteins and amino acids-dissolved carbohydarte,which may represent a form of storage of detoxication of germanium.These results suggest that rsponse of algae to germanium toxicity is different, which reflects a physiological difference among algae.
【Key Words】: Microalgae Germanium Toxicity Accumulation
【CateGory Index】: X173
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