Korean Journal of Ichthyology (한국어류학회지)

The Ichthyological Society of Korea (한국어류학회)
권호 표지

Anatomical Ultrastructure of Spermatozoa of Platichthys stellatus (Pleuronectidae, Pleuronectiformes) from Korea

강도다리(Platichthys stellatus) 정자의 미세해부학적 구조 (가자미목, 가자미과)

  • Kwon, Ae Sook (Department of Nursing, Kyong Woon University) ;
  • Kim, Kgu Hwan (Department of Radiological Technology, Daegu Health College)
  • 권애숙 (경운대학교 간호학과) ;
  • 김구환 (대구보건대학교 방사선과)
  • Received : 2014.10.28
  • Accepted : 2014.12.15
  • Published : 2014.12.31
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Abstract

The spermatozoa of Platichthys stellatus is relatively simple cells composed of a spherical head, a short midpiece, and a tail, as in most Pleuronectiformes. The ultrastructure is characterized by the following features: a round nucleus with a deep nuclear fossa, the centriolar complex located at a right angle to each other, a short midpiece, a tail with paired lateral ribbon and no acrosome. However there are some minor morphological differences, including the appearance and number of the mitochondria, the shape and size of the nuclear fossa and the structure of the basal body. Especially the basal body structure consisting of a basal foot, a rootlet and nine alar sheets structures varies considerably in different species. It can be used as indicator of relationships in Pleuronectiformes because minute morphological differences might have functional and evolutionary significance. In conclusion, the spermatozoa of P. stellatus show a certain structural homogeneity and provide support for the concept that ultrastructural features of spermatozoa can be useful in taxonomic studies of Pleuronectiformes.

강도다리(Platichthys stellatus)의 정자는 대부분의 경골어류에서와 같이 첨체를 가지고 있지 않는 구형의 핵, 짧은 중편 및 꼬리를 가진 전형적인 수중형의 정자 형태를 하였다. 정자의 미세구조는 전자밀도가 높은 염색질 부위를 가지는 핵과 핵 기부에 위치한 깊이 함입된 핵와(nuclear fossa) 그리고 그 속에 기부 중심립과 말단부 중심립이 포함되어 있었다. 두 중심립은 90도의 각도로 배열되어 있었으며, 미토콘드리아는 중편 세포질에 배열되어 있으며 핵의 후반부와 꼬리의 기부를 둘러 싸고 있었다. 꼬리는 축사와 2개의 lateral ribbon로 구성되어 있었다. 이러한 특징들은 가자미류의 공유형질로 나타났다. 그러나 미토콘드리아의 수와 모양, 핵와의 모양과 크기에서는 종 특이적 특징을 나타내었다. 특히 강도다리 정자의 가장 큰 구조적 특징은 basal foot, rootlet 그리고 alar sheets로 구성된 기저체이었다. 이 구조의 형태적 특징은 다른 종들 사이에서 아주 다양하게 나타내었다. 이러한 구조는 가자미목의 계통적 관계를 연구하는데 매우 중요한 형질로 여겨진다.

Keywords

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