Toxicity and Accumulation of Selenite in Four Microalgae

• Published in: Chinese journal of oceanology and limnology Vol. 21; no. 3; pp. 280 - 285
• Main Author: 王大志 程兆第 李少菁 高亚辉
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Nature B.V 01.09.2003; Key Laboratory for Marine Environmental Science of Ministry of Education/ Environmental Science Research Center, Xiamen University, Xiamen 361005, China%Department of Biology, Xiamen University, Xiamen, 361005, China%Department of Oceanography, Xiamen University, Xiamen,361005, China
• Subjects: Algae; Algal growth; Aquatic microorganisms; Bioaccumulation; Detoxification; Dunaliella salina; Intracellular; Lipids; Macromolecules; Marine; Microalgae; Phytoplankton; proteins; Selenite; Selenites; Selenium; Toxicity; 亚硒酸盐; 微藻类; 海洋生物学; 细胞内聚集; toxicity; microalgae; accumulation intracellular; distribution; selenite
• ISSN: 0254-4059; 2096-5508; 1993-5005; 2523-3521
• DOI: 10.1007/BF02842844

The toxicity and bioaccumulation of selenite in four microalgae, Spirulina platensis,Dunaliella salina, DunalieUa bardawill and Phaeodactylum tricornutum cultured in the presence of selenite were investigated. Lower concentrations of selenite were generally nontoxic and frequently stimulated algal growth, while higher concentrations of selenite inhibited algal growth. Selenite was more toxic to D. salina and D. bardawill than to S. platensis and P. tricornutum. All algae cultured in selenite were able to incorporate Se to different degrees, which depended on algal species. The distributions of selenite among intracellular macromolecular compounds were different among algal species : most of the selenite was associated with proteins in S. platensis, D. salina and D. bardawill, while most of the selenite was associated with lipids in P. tricornutum, which reflected the physiological differences among the algae. These observations suggest that algae are able to accumulate selenite and bind it with intracell~ar macromolecular compounds when exposed to high concentration of selenite. This may represent a form of storage or detoxification of selenite by the algae.