The Korean Journal of Malacology (한국패류학회지)

The Malacological Society of Korea (한국패류학회)
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Changes of Morphology and Morphometric Characteristics of the Oocyte during Oogenesis of the Abalone Haliotis discus hannai

북방전복 Haliotis discus hannai 난자형성과정 동안 난모세포의 형태 및 계측형질 변화

  • Ju, Sun Mi (Department of Aqualife Medicine, Chonnam National University) ;
  • Lee, Jung Sick (Department of Aqualife Medicine, Chonnam National University)
  • 주선미 (전남대학교 수산생명의학과) ;
  • 이정식 (전남대학교 수산생명의학과)
  • Received : 2016.02.16
  • Accepted : 2016.03.30
  • Published : 2016.03.31
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Abstract

The developmental stage of germ cells during oogenesis can be categorized into six stages with histological features: (1) oogonium, (2) previtellogenic oocyte, (3) initial vitellogenic oocyte, (4) early active vitellogenic oocyte, (5) late active vitellogenic oocyte and (6) ripe oocyte. The size of oocyte, nucleus and nucleolus illustrated the increase tendency but size ratio of nucleolus to nucleus was decreased during oogenesis. During oogenesis the stainability in the cytoplasm of oocyte changes from basophilic to eosinophilic in H-E stain. And egg stalk and outer jelly membrane was developed in the oocyte. These histological changes are seemed to be yolk accumulation in the oocyte and preparation process for spawning.

북방전복에서 난자형성과정 동안 생식세포는 조직학적 특징에 따라 난원세포 (oogonium), 난황형성전기 난모세포(previtellogenic oocyte), 난황형성개시기 난모세포 (initial vitellogenic oocyte), 난황형성초기활성기 난모세포 (early active vitellogenic oocyte), 난황형성후기활성기 난모세포(late active vitellogenic oocyte) 및 완숙기 난모세포 (ripe oocyte)로 구분할 수 있다. 난자형성과정 동안 난모세포, 핵 및 인의 크기는 증가하는 경향을 보였으나 핵에 대한 인의 크기 비율은 감소하였다. 난모세포 세포질의 염색성은 H-E 염색에서 호염기성에서 호산성으로 변하였다. 난자형성과정 동안 난모세포에서 난병과 젤리층의 외막이 발달되었다. 이러한 조직학적 변화는 난모세포의 난황축적 및 산란준비과정으로 판단된다.

Keywords

References

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