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Ultrastructural Study on the Development of Male Germ Cell of the Olive Flounder, Paralichthys olivaceus (Teleostei: Pleuronectidae)  

Kim, Jae-Won (Department of Marine Biology, Pukyong National University)
Kim, Bong-Seok (Biotechnology Research Center, National Fisheries Research and Development Institute)
Choi, Cheol-Young (Laboratory of Gene Regulation and Development, National Institute of Child Health and Human Development, National Institutes of Health (NIH))
Lee, Jung-Sick (Department of Fish Pathology, Yosu National University)
Publication Information
Applied Microscopy / v.33, no.3, 2003 , pp. 243-250 More about this Journal
Abstract
Ultrastructural changes of the male germ cells and structure of spermatozoa in Paralichthys olivaceus were examined by means of the light and transmission electron microscopes. The spermatogonium has a large nucleus with a single nucleus with a single nucleolus in the interphase. Primary spermatocytes are identified by the formation of the synaptonemal complex in the karyoplasm. The secondary spermatocytes are more concentrated and contains numerous cell organelle in the cytoplasm. The nucleus of spermatid in spermiogenesis is more condensed in the karyoplasm, and show spherical structure in shape. Mitochondria of the spermatids are observed in the lower portion of the nucleus. The spermatozoon consists of the head, mid piece and tail. The acrosome is not observed in the head. Axial filaments of the flagellum consists of nine pairs of the peripheral microtubules and one pair of the central microtubules.
Keywords
Paralichthys olivaceus; Spermatogenesis; Ultrastructure;
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