期刊
ECOTOXICOLOGY
卷 21, 期 7, 页码 1957-1964出版社
SPRINGER
DOI: 10.1007/s10646-012-0930-3
关键词
Euglena gracilis; Ariel detergent; Chlorophyll; Motility; Photosynthesis; Toxicity
资金
- Kohat University of Science and Technology (KUST) Kohat, Khyber Pakhtunkhwa, Pakistan
Chronic toxicity of the common laundry detergent Ariel on the freshwater alga Euglena gracilis was investigated by growing the alga in a medium containing the detergent for 7 days. Cell density, motility, swimming velocity, gravitactic orientation, cell shape, photosynthesis and concentration of light-harvesting pigments were used as end point parameters for the assessment of toxicity. Cell density was significantly reduced at a concentration of 1 mg l(-1) or above. Among the other tested parameters, with the exception of cell shape, gravitaxis and chlorophyll b, all were adversely affected by the detergent at concentrations exceeding 1 mg l(-1). It is concluded that long-term (7-days) exposure to the detergent caused significant toxicity to E. gracilis. Furthermore, long-term tests with E. gracilis can be used as sensitive indicator for the toxicity assessment of laundry detergents in aquatic environments.
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