Development and Reproduction (한국발생생물학회지:발생과생식)

The Korean Society of Developmental Biology (한국발생생물학회)
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Effects of Different Light Spectra on the Oocyte Maturation in Grass Puffer Takifugu niphobles

  • Choi, Song-Hee (Marine Science Institute, Jeju National University) ;
  • Kim, Byeong-Hoon (Marine Science Institute, Jeju National University) ;
  • Hur, Sung-Pyo (Jeju International Marine Science Research & Logistics Center, Korea Institute of Ocean Science & Technology) ;
  • Lee, Chi-Hoon (CR Co., Ltd.) ;
  • Lee, Young-Don (Marine Science Institute, Jeju National University)
  • Received : 2018.05.16
  • Accepted : 2018.06.04
  • Published : 2018.06.30
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Abstract

In order to examine the effects of four different light spectra (white, red, green, and blue) on the oocyte maturation, the change of reproductive parameters, via brain-pituitary-gonad (BPG) axis in grass puffer, were investigated. After exposure four different light spectra for 7 weeks, the abundance of gonadotropin-releasing hormone (GnRH) mRNA which is a type of seabream (sbGnRH) and two different subunit of gonadotropin hormones mRNAs, follicle-stimulating hormone ($fsh{\beta}$) mRNA and luteinizing hormone ($lh{\beta}$) mRNA, were analyzed in the brain and pituitary. Histological analysis showed that the mature oocyte ratio in the green spectrum was higher than other light spectra-exposed groups. Gonadosomatic index (GSI) and oocyte developmental stage were also investigated in the gonad based on histological observations. GSI value with the presence of yolk stage oocytes was significantly increased in the green spectrum-exposed group when compared to that of the other light-exposed groups (white, red, and blue) (p<0.05). The abundances of sbGnRH mRNA and $fsh{\beta}$ mRNA in the green spectrum-exposed group were also significant higher than those of the other light spectra-exposed groups (p<0.05). These results indicate that the maturation of oocyte in grass puffer can be accelerated by exposure to the spectrum of green. To better understand the molecular mechanism for the maturation of oocyte in grass puffer, further study examining the relationship between oocyte development and its related genes is required.

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References

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