Department of Green Life Science, Sangmyung University, Seoul 110-743, Republic of Korea.
J Microbiol. 2013 Feb;51(1):136-9. doi: 10.1007/s12275-013-2114-0. Epub 2013 Mar 2.
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.
除草剂甲草胺（MC）对三种海洋微藻（绿藻四角藻、硅藻双鞭甲藻和甲藻夜光藻）的毒性效应进行了评估。MC 表现出细胞计数和叶绿素 a 水平的显著降低。基于 72 小时 MC 暴露后叶绿素 a 水平计算得出半数有效浓度（EC50）。T. suecica、D. brightwellii 和 P. minimum 的 EC50 值分别为 21.3、0.423 和 0.07 mg/L。这些值表明，当该除草剂以与淡水藻类相当的浓度暴露时，甲藻对其最为敏感，表明其作为海洋环境生态毒性评估的合适模式生物具有潜力。
