Applied Microscopy

Korean Society of Microscopy (한국현미경학회)
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Ultrastructure of the Sperm in Testes of the Pond Smelt (Hypomesus nipponensis)

빙어(Hypomesus nipponensis)의 정소 내 정자의 미세구조

  • Kim, Jae-Goo (Faculty of Biological Science, College of Natural Sciences, Chonbuk National University) ;
  • Park, No-Kwan (Department of Life Science, Cheongju University) ;
  • Reu, Dong-Suck (Department of Life Science, Cheongju University)
  • 김재구 (전북대학교 자연과학대학 생물과학부) ;
  • 박노관 (청주대학교 생명과학과) ;
  • 류동석 (청주대학교 생명과학과)
  • Received : 2010.12.13
  • Accepted : 2010.12.24
  • Published : 2010.12.31
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Abstract

The ultrastructure of sperms in testes of the pond smelt (Hypomesus nipponensis) was investigated using electron microscopes. The whitish testis was located between swim bladder and intestine. Especially, the left testis was larger than the right testis. The sperm was approximately $26\;{\mu}m$ in length. The sperm had an oval head and the acrosome was not found. The nucleus was about 400 nm in diameter and chromatin was incompletely condensed. The nuclear fossa deeply formed in sperm head and two centrioles were located in the fossa. The mitochondrium was observed only one in midpiece of the sperm and a motile flagellum consisted of an axoneme with a typical 9+2 pattern of microtubule. Also, the tail of the sperm has axonemal fins.

바다잉어과(Osmeridae)에 속하는 빙어(Hypomesus niponesis)의 정소 내 성숙한 정자들을 전자현미경을 이용하여 조사하였다. 빙어의 정소는 한 쌍으로 부레와 창자 사이에 위치하였고 좌측 정소가 우측 정소보다 큰 것으로 나타났으며 흰색이었다. 정소 내의 성숙한 정자의 길이는 $26{\mu}m$ 정도였다. 두부는 난형으로 직경은 400 nm 정도였으며 첨체는 관찰되지 않았고, 특히 염색질의 이질적 응축이 관찰되었다. 두부의 핵이 함입되어 핵와(nuclear fossa)가 깊게 형성되었으며 핵와 내 기저부에서 편모가 직선으로 분포하였고 편모의 미세소관은 전형적인 9+2 구조를 이루고 있었다. 또한 편모의 외측에는 두개의 axonemal fin이 관찰되었으며, 중편에는 미토콘드리아가 하나만 존재하였다.

Keywords

References

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