open access
메뉴
open access
메뉴
ISSN : 1225-3480
The structure of the ovary, ultrastructure of oocytes and morphological characteristics of vitellogenesis during oogenesis in female Gomphina veneriformis were investigated in clams collected from coastal waters of Samchok, Gangwon-do, Kore. In the previtellogenic oocytes, the Golgi complex was involved in the formation of a number of vacuoles. In the early vitellogenic oocytes, lipid droplets appeared among the Golgi complex, endoplasmic reticulum, and mitochondria in the cytoplasm of the oocyte were involved in the formation of lipid droplets. Coated vesicles, resulting from endocytosis appeared at the basal region of the early vitellogenic oocyte. The uptake of nutritive materials in the coated vesicles formed by receptor-mediated endocytosis appeared through the formation of coated endocytotic pits on the oolemma. In the late vitellogenic oocytes, large yolk granules were formed by a combination of small yolk granules. In the mature oocyte, a mature yolk granule in composed of three components: crystaline core, electron lucent cortex, and a limiting membrane. According to cytological and histological observations, vitellogenesis occurred by way of endogenous autosynthesis and exogenous heterosynthesis. Autosynthesis involved the conbined activities of the Golgi complex, mitochondria, rough endoplasmic reticulum, whereas heterosynthesis involved endocytotic incorporation of extraovarian precursors at the basal region of the early vitellogenic oocyte. The follicle cells which was attached to oocytes, were involved in the development of the previtellogenic and early vitellogenic oocytes as a kind of nutritive cells containing a number of glycogen particles and lipid droplets in the cytoplasm.
Chung, E.Y., Kim, S.Y., Park, K.H. and Park, G.M. (2002) Sexual maturation, spawning, and deposition of the egg capsules of the female purple shell, Rapana venosa (Gastropoda: Muricidae). Malacologia, 44: 241-257.
Chung, E.Y., Park, Y.J., Lee, J.Y. and Ryu, D.K. (2005) Germ cell differentiation and and sexual maturation of the hanging cultured female scallop Patinopecten yessoensis on the east coast of Korea. Journal of Shellfish Research, 24: 913-921.
Chung, E.Y., Kim, S. Y., Park G.M. and Yoon, J.M. (2006) Germ cell differentiation and sexual maturation of the female Neptunea (Barbitonia) arthritica cumingii (Crosse, 1862) (Gastropoda:Buccinidae). Malacologia, 48: 65-76.
Chung, E.Y. (2007) Oogenesis and sexual maturation in Meretrix lusoria (Röding, 1798) (Bivalvia: Veneridae) in western Korea. Journal of Shellfish Research, 26(1): 71-80.
Chung EY (2008) Ultrastructural studies of oofenesis and sexual maturation in female Chalmys (Azumapecten) farreri farreri (Jones & Preston, 1904) (Pteriomorphia: Pectinidae) on the western coast of Korea. Malacologia, 50: 279-292.
Chung, E.Y., Ko, C.H., Kang, H.W., Choi, K.H, and Jun, J.C. (2008) Ultrastucture of oocyte during oogenesis and oocyte degeneration associated with follicle cells in female Sinonovacula constricta (Bivalvia:Pharidae) in western Korea. Animal Cells and Systems, 12: 313-319.
Chung E. Y., Chung, C.H., Kim, J.H. Park, S.W. and Park, K.H. (2010) Ultrastructures of germ cells and the accessory cells during spermatogenesis in male Gomphina veneriformis (Bivalvia: Veneridae) on the East Sea of Korea. 26:1 51-62.
Dorang, G. and Le Pennec, M. (1989) Ultrastructural study of oogenesis and oocytic degeneration in Pecten maximus from the Bay of St. Brieuc. Marine Biology, 103: 339-348.
Eckelvarger, K.J. and Davis, C.V. (1996) Utrastructure of the gonad and gametogenesis in the eastern oyster, Crassostrea virginica. 1. Ovary and oogenesis. Marine Biology, 127: 79-87.
Gaulejac, D.B., Henry, M. and Vicente, N. (1995) An ultrastructural study of the marine bivalve Pinna nobilis (Linnaeus, 1758) 1. Oogenesis. Journal of Molluscan Study 6: 375-392.
Jong-Brink, de M., Boer, H.H. and Joosse, J. (1983). Mollusca. In: Adiyodi vol. 1. Oogenesis, oviposition, and oosorption. New York: John Wiley and Sons pp. 297-355.
Kwon, O.K., Park, G.M. and Lee J.S. (1993) Coloured shells of Korea. Academy Publishing Co., 288 pp. (in Korean)
Lee, J.J. (1976) Ecological studies for the culture of the clam, Gomphina veneriformis 1. Studies on the spawning season, artificial fertilization and egg development. Bulletin of Mariane Biology Station Jeju National Universty, 1: 11-20.
Lee, J.Y., Park, Y.J and Chang Y.J. (1999) Gonadal development and reproductive cycle of Gomphina melanaegis (Bivalvia; Venerida).
Park, C.K., Park J.J., Lee J.Y. and Lee, J.S. (2002). Spermatogenesis and sperm ultrastructure of the equilateral venus, Gomphina veneriformis (Bivalvia:Veneridae). Korean Journal of Electron Microscopy, 32: 303-310.
Pipe, R. K., 1987. Oogenesis in the marine mussel Mytilus edulis: an ultrastructural study. Marine Biology, 95: 405-414.
Yoo, J. S., 1976. Korean Shells in Colour. (in Korean). Ilgisa Seoul, 196 pp.