Journal
JOURNAL OF MICROBIOLOGY
Volume 51, Issue 1, Pages 136-139Publisher
MICROBIOLOGICAL SOCIETY KOREA
DOI: 10.1007/s12275-013-2114-0
Keywords
marine microalgae; ecotoxicity assessment; EC50; herbicide; metolachlor
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Funding
- Ministry of Environment, Korea
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Toxic effects of the herbicide metolachlor (MC) were evaluated for three marine microalgae, Tetraselmis suecica (chlorophyte), Ditylum brightwellii (diatom), and Prorocentrum minimum (dinoflagellate). MC showed a significant reduction in cell counts and chlorophyll a levels. Median effective concentration (EC50) was calculated based on chlorophyll a levels after a 72-h MC exposure. EC50 values for T. suecica, D. brightwellii, and P. minimum were 21.3, 0.423, and 0.07 mg/L, respectively. These values showed that the dinoflagellate was most sensitive when exposed to the herbicide, at a concentration comparable to freshwater algae, suggesting its potential as an appropriate model organism for ecotoxicity assessments in marine environments.
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