NOTE] Quantification of Toxic Effects of the Herbicide Metolachlor on Marine Microalgae Ditylum brightwellii (Bacillariophyceae), Prorocentrum minimum (Dinophyceae), and Tetraselmis suecica (Chlorophyceae)

Vinitha Ebenezer; Jang-Seu Ki

doi:10.1007/s12275-013-2114-0

Research Support, Non-U.S. Gov't
NOTE] Quantification of Toxic Effects of the Herbicide Metolachlor on Marine Microalgae Ditylum brightwellii (Bacillariophyceae), Prorocentrum minimum (Dinophyceae), and Tetraselmis suecica (Chlorophyceae): Vinitha Ebenezer , Jang-Seu Ki; Journal of Microbiology 2013;51(1):136-139
DOI: https://doi.org/10.1007/s12275-013-2114-0
Published online: March 2, 2013

Department of Green Life Science, Sangmyung University, Seoul 110-743, Republic of KoreaDepartment of Green Life Science, Sangmyung University, Seoul 110-743, Republic of Korea

Corresponding author: Jang-Seu Ki , Tel: +82-2-2287-5449,

Received: 2 March 2012 • Accepted: 17 September 2012

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Abstract

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.

Keywords: marine microalgae; ecotoxicity assessment; EC50; herbicide; metolachlor

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NOTE] Quantification of Toxic Effects of the Herbicide Metolachlor on Marine Microalgae Ditylum brightwellii (Bacillariophyceae), Prorocentrum minimum (Dinophyceae), and Tetraselmis suecica (Chlorophyceae)

J. Microbiol. 2013;51(1):136-139. Published online March 2, 2013

DOI: https://doi.org/10.1007/s12275-013-2114-0

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