한국발생생물학회지:발생과생식 (Development and Reproduction)

  • 제18권4호
  • /
  • Pages.321-327
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  • 2014
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  • 2465-9525(pISSN)
  • /
  • 2465-9541(eISSN)
한국발생생물학회 (The Korean Society of Developmental Biology)
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Oocyte Degeneration Associated with Follicle Cells in Female Mactra chinensis (Bivalvia: Mactridae)

  • Kim, Sung Han (Dept. of Aquaculture and Aquatic Sciences, Kunsan National University) ;
  • Chung, Ee-Yung (Dept. of Marine Biotechnology, Kunsan National University) ;
  • Lee, Ki-Young (Dept. of Marine Biotechnology, Kunsan National University)
  • 투고 : 2014.12.09
  • 심사 : 2014.12.18
  • 발행 : 2014.12.31
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초록

Ultrastructural studies of oocyte degeneration in the oocyte, and the functions of follicle cells during oocyte degeneration are described to clarify the reproductive mechanism on oocyte degeneration of Mactra chinensis using cytological methods. Commonly, the follicle cells are attached to the oocyte. Follicle cells play an important role in oocyte degeneration. In particular, the functions of follicle cells during oocyte degeneration are associated with phagocytosis and the intracellular digestion of products. In this study, morphologically similar degenerated phagosomes (various lysosomes), which were observed in the degenerated oocytes, appeared in the follicle cells. After the spawning of the oocytes, the follicle cells were involved in oocyte degeneration through phagocytosis by phagolysosomes. Therefore, it can be assumed that follicle cells reabsorb phagosomes from degenerated oocytes. In this study, the presence of lipid granules, which occurred from degenerating yolk granules, gradually increased in degenerating oocytes. The function of follicle cells can accumulate reserves of lipid granules and glycogen in the cytoplasm, which can be employed by the vitellogenic oocyte. Based on observations of follicle cells attached to degenerating oocytes after spawning, the follicle cells of this species are involved in the lysosomal induction of oocyte degeneration for the reabsorption of phagosomes (phagolysosomes) in the cytoplasm for nutrient storage, as seen in other bivalves.

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참고문헌

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