Toxicological effects induced by the biocide triclosan on Pseudokirchneriella subcapitata

Triclosan, a widely used biocide broadly found in aquatic environments, is cause of concern due to its unknown effects on non-targets organisms. In this study, multi biomarker approach was order evaluate the 72 h-effect triclosan freshwater alga Pseudokirchneriella subcapitata (Raphidocelis subcapitata). at environmental relevant concentrations (27 and 37 μg L−1), caused decrease proliferative capacity, which accompanied by an increase cell size profound alteration algae shape. It that promoted intracellular accumulation reactive oxygen species, depletion non-enzymatic antioxidant defenses (reduced glutathione carotenoids) metabolic activity. A reduction photosynthetic pigments (chlorophyll b) also observed. For highest concentration tested (37 efficiency detected along with diminution relative transport rate electrons chain. conclusion, presents deep impact microalga P. morphology physiology translated multiple target sites instead specific point (cellular membrane) observed organism (bacteria). Additionally, study contributes clarify toxicity mechanisms triclosan, green algae, showing existence distinct modes action depending microalga.