title: Quantification of toxic effects of the herbicide metolachlor on marine microalgae Ditylum brightwellii (Bacillariophyceae), Prorocentrum minimum (Dinophyceae), and Tetraselmis suecica (Chlorophyceae).
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.
authors: Department of Green Life Science, Sangmyung University, Seoul 110-743, Republic of Korea.
authors: Vinitha
authors: V
authors: Ebenezer
authors: Jang-Seu
authors: JS
authors: Ki
mesh_terms: D000081:Acetamides / Q000633:toxicity*; D056893:Alveolata / Q000737:chemistry / Q000187:drug effects* / Q000502:physiology; D059001:Aquatic Organisms / Q000187:drug effects; D002452:Cell Count; D002734:Chlorophyll / Q000032:analysis; D000077194:Chlorophyll A; D000460:Chlorophyta / Q000737:chemistry / Q000187:drug effects* / Q000502:physiology; D017377:Diatoms / Q000737:chemistry / Q000187:drug effects* / Q000502:physiology; D006540:Herbicides / Q000633:toxicity*
chemical_list: D000081:Acetamides; D006540:Herbicides; D002734:Chlorophyll; C051786:metolachlor; D000077194:Chlorophyll A