Contribution to the Knowledge of Fertilization of Gymnosperms with Flagellated Sperm Cells: Ginkgo biloba and Cycas revoluta

  • Terumitsu Hori
  • Shin-ichi Miyamura


It was Strasburger [1] who first drew attention to fertilization in Ginkgo biloba. He followed the development of the embryonic sac and embryo as well as the formation of the female gametophyte. Much later, as a result of his study on fertilization in Juniperus virginiana, he argued in favor of the existence of canal cells in Ginkgo and contributed to the knowledge of the development of the embryo [2]; however, he did not make any observations on fertilization himself. His last work on Ginkgo was on the development of the pollen [3].


Pollen Tube Sperm Cell Male Gametophyte Spermatogenous Cell Sperm Nucleus 


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Copyright information

© Springer-Verlag Tokyo 1997

Authors and Affiliations

  • Terumitsu Hori
    • 1
  • Shin-ichi Miyamura
    • 1
  1. 1.Institute of Biological SciencesUniversity of TsukubaTsukuba, Ibaraki 305Japan

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