한국발생생물학회지:발생과생식 (Development and Reproduction)

  • 제15권3호
  • /
  • Pages.239-247
  • /
  • 2011
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  • 2465-9525(pISSN)
  • /
  • 2465-9541(eISSN)
한국발생생물학회 (The Korean Society of Developmental Biology)
권호 표지

Germ Cell Development during Spermatogenesis and Taxonomic Values of Sperm Morphology in Septifer (Mytilisepta) virgatus (Bivalvia: Mytilidae)

  • Kim, Jin-Hee (Marine Eco-Technology Institute) ;
  • Kim, Sung-Han (Dept. of Aquaculture and Aquatic Sciences, Kunsan National University)
  • 투고 : 2011.07.29
  • 심사 : 2011.08.14
  • 발행 : 2011.09.30
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초록

Spermatogenesis and taxonomic values of mature sperm morphology of in male Septifer (Mytilisepta) virgatus were investigated by transmission electron microscope observations. The morphologies of the sperm nucleus and the acrosome of this species are the cylinder shape and cone shape, respectively. Spermatozoa are approximately 45-50 ${\mu}m$ in length including a sperm nucleus (about 1.26 ${\mu}m$ long), an acrosome (about 0.99 ${\mu}m$ long), and tail flagellum (about 45-47 ${\mu}m$). Several electron-dense proacrosomal vesicles become later the definitive acrosomal vesicle by the fusion of several Golgi-derived vesicles. The acrosome of this species has two regions of differing electron density: there is a thin, outer electron-dense opaque region (part) at the anterior end, behind which is a thicker, more electron-lucent region (part). In genus Septifer in Mytilidae, an axial rod does not find and also a mid-central line hole does not appear in the sperm nucleus. However, in genus Mytilus in Mytilidae, in subclass Pteriomorphia, an axial rod and a mid-central line hole appeared in the sperm nucleus. These morphological differences of the acrosome and sperm nucleus between the genuses Septifer and Mytilus can be used for phylogenetic and taxonomic analyses as a taxonomic key or a significant tool. The number of mitochondria in the midpiece of the sperm of this species are five, as seen in subclass Pteriomorphia.

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참고문헌

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