Morphological Aspects of Ascidian Fertilization

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概要

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• The spermatozoa of ascidians have an acrosome(s), albeit a small one. In Ciona intestinalis, an acrosome reaction occurs via vesiculation in fundamentahy the same way as observed in mammalian spermatozoa. After the acrosome reaction, apical processes protrude from the apex of the sperm head in the perivitelline space. Gamete fusion takes place between some of these apical processes and egg plasmalemma, resulting in the incorporation of the sperm into the egg from the anterior tip of its head in the same way that it does in other marine invertebrates. Fertilization in C. intestinalis has characteristics of both mammals and marine invertebrates. This is a new type of fertilization which has not been previously described. Some speculations are also presented on ascidian fertilization.

• 社団法人日本動物学会の論文
• 1990-12-15

著者

• Fukumoto Makoto

  Biological Institute College Of General Education Nagoya City University

関連論文

• The Acrosome and Its Differentiation during Spermiogenesis in Halocynthia roretzi : Ascidiacea, Tunicata
• Morphological Aspects of Ascidian Fertilization

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