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Fertilization inChlamydomonas reinhardi, with special reference to the structure, development, and fate of the choanoid body

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Summary

The role of the choanoid body in fertilization is discussed. The choanoid body, an electron dense ring composed of tubular elements, develops in the plus gamete during gametogenesis. When plus and minus gamete cells are mixed, a fertilization tubule develops from the choanoid body. Microfilaments produced from the choanoid body fill the lumen of the elongating tubule. During mating, the fertilization tubule makes contact with an electron dense plate associated with the plasma membrane of the minus gamete. Fusion occurs and a fertilization bridge is established. Microfilaments extend from the choanoid body toward the minus nucleus. With the establishment of a bridge of endoplasmic reticulum between the nuclei, the microfilament association ceases.

The significance of microfilaments in both plasmogamy and karyogamy is discussed.

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References

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  1. Richard E. Triemer

    Present address: Department of Botany, University of North Carolina, Chapel Hill, North Carolina, USA

Authors and Affiliations

  1. Department of Botany, University of North Carolina, Chapel Hill, North Carolina, USA

    R. Malcolm Brown Jr.

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  1. Richard E. Triemer
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  2. R. Malcolm Brown Jr.
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Triemer, R.E., Malcolm Brown, R. Fertilization inChlamydomonas reinhardi, with special reference to the structure, development, and fate of the choanoid body. Protoplasma 85, 99–107 (1975). https://doi.org/10.1007/BF01567761

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  • DOI: https://doi.org/10.1007/BF01567761

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