Journal of Ecology and Rural Environment ›› 2017, Vol. 33 ›› Issue (8): 737-742.doi: 10.11934/j.issn.1673-4831.2017.08.009

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Toxic Effects of 4-Nonyl Phenol on Zebrafish (Danio rerio) Embryo/Larva

ZHANG Hui1,2, JIANG Jin-lin1, ZHANG Yu-feng2, SHAN Zheng-jun1, BU Yuan-qing1, TIAN Feng1   

  1. 1. Key Laboratory of Pesticide Environmental Assessment and Pollution Control, Nanjing Institute of Environmental Sciences, Ministry of Environmental Protection, Nanjing 210042, China;
    2. College of Environment, Nanjing Tech University, Nanjing 210009, China
  • Received:2016-08-18 Online:2017-08-25 Published:2017-09-25

Abstract:

4-Nonylphenol (4-NP), a stable environmental endocrine disruptor, exerts negative effects on the growth and development of organisms. Danio rerio embryos were exposed to a series of concentrations of 4-NP at 2.0, 5.0, 10.0, 25.0, 50.0 and 125.0 μg·L-1 for 120 h. During the exposure, the mortality, hatching rates and abnormalities of embryos, as well as the body length and heart rates in 30 s were recorded everyday till the larva in the control group began to die as a result of hunger. The results show that the LC50 of Danio rerio embryos exposed to 4-NP after 48, 72 and 96 h were 131.4, 47.2 and 26.8 μg·L-1, respectively. The hatching rate of Danio rerio embryos significantly declined due to the lethal effect of 125.0 μg·L-1 of 4-NP. In addition, exposure to 4-NP significantly increased the tail malformation and pericardial cyst rates of Danio rerio embryos. A positive dose-response relationship was observed in the tail malformation rates. Compared to the control group, the Danio rerio larva in all 4-NP treatment groups had shorter body length and less 30 s heart rates. These results suggested that exposure to 2.0 μg·L-1 concentration of 4-NP can exert teratogenic and lethal effects on the Danio rerio embryos.

Key words: 4-nonylphenol, Danio rerio, embryonic development, toxic effect

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