title: Triazole-induced toxicity in developing rare minnow (Gobiocypris rarus) embryos.
abstract: Using rare minnow (Gobiocypris rarus) at early-life stages as experimental models, the developmental toxicity of five widely used triazole fungicides (myclobutanil, fluconazole, flusilazole, triflumizole, and epoxiconazole) were investigated following exposure to 1-15 mg/L for 72 h. Meanwhile, morphological parameters (body length, body weight, and heart rate), enzyme activities (superoxide dismutase (SOD), glutathione S-transferase (GST), adenosine triphosphatase (ATPase), and acetyl cholinesterase (AChE)), and mRNA levels (hsp70, mstn, mt, apaf1, vezf1, and cyp1a) were also recorded following exposure to 0.2, 1.0, and 5.0 mg/L for 72 h. Results indicated that increased malformation and mortality, decreased body length, body weight, and heart rate provide a concentration-dependent pattern; values of 72 h LC50 (median lethal concentration) and EC50 (median effective concentration) ranged from 3 to 12 mg/L. Most importantly, the results of the present study suggest that even at the lowest concentration, 0.2 mg/L, five triazole fungicides also caused notable changes in enzyme activities and mRNA levels. Overall, the present study points out that those five triazole fungicides are highly toxic to the early development of G. rarus embryos. The information presented in this study will be helpful in better understanding the toxicity induced by triazole fungicides in fish embryos.
authors.affiliation: Northwest A&F University, Xinong Road 22nd, Yangling, Shaanxi, 712100, China.
authors.forename: Bin
authors.initials: B
authors.lastname: Zhu
authors.forename: Lei
authors.initials: L
authors.lastname: Liu
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Gong
authors.forename: Fei
authors.initials: F
authors.lastname: Ling
authors.forename: Gao-Xue
authors.initials: GX
authors.lastname: Wang
mesh_terms: D000110:Acetylcholinesterase / Q000235:genetics / Q000378:metabolism; D000251:Adenosine Triphosphatases / Q000235:genetics / Q000378:metabolism; D000818:Animals; D003530:Cyprinidae / Q000196:embryology; D004625:Embryo, Nonmammalian / Q000187:drug effects* / Q000196:embryology; D004852:Epoxy Compounds / Q000633:toxicity; D029941:Fish Proteins / Q000235:genetics / Q000378:metabolism; D015725:Fluconazole / Q000633:toxicity; D005659:Fungicides, Industrial / Q000633:toxicity*; D015870:Gene Expression / Q000187:drug effects; D005982:Glutathione Transferase / Q000235:genetics / Q000378:metabolism; D007093:Imidazoles / Q000633:toxicity; D009570:Nitriles / Q000633:toxicity; D012821:Silanes / Q000633:toxicity; D013482:Superoxide Dismutase / Q000235:genetics / Q000378:metabolism; D014230:Triazoles / Q000633:toxicity; D014874:Water Pollutants, Chemical / Q000633:toxicity*
chemical_list: D004852:Epoxy Compounds; D029941:Fish Proteins; D005659:Fungicides, Industrial; D007093:Imidazoles; D009570:Nitriles; D012821:Silanes; D014230:Triazoles; D014874:Water Pollutants, Chemical; C053549:triflumizol; D015725:Fluconazole; C446685:systhane; D013482:Superoxide Dismutase; D005982:Glutathione Transferase; D000110:Acetylcholinesterase; D000251:Adenosine Triphosphatases; C061365:flusilazole; C109476:epoxiconazole