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Ultrastructural changes accompanying mitosporogenesis inEctocarpus parvus

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Summary

The plurilocular zoosporangium ofEctocarpus parvus Saunders is initiated as a uniseriate branch from a vegetative cell. Subsequent anticlinal and periclinal divisions of the cells leads to enlargement of the sporangium and the formation of multiple locules. Each locule contains a single biflagellate zoospore. Ultrastructural changes accompanying these events include a reduction in the size of chromatophores, a reduction in the number of dictyosomes and the appearance of plasmalemmasomes in later stages. Enlargement of the mitochondria and a decrease in size of the nucleus occur in the final stages of zoospore formation. Comparison with the vegetative and sporogenous cells of other brown algae are made.

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Author notes

  1. Paul F. Lofthouse

    Present address: Department of Biology, California State University, Los Angeles, California, USA

Authors and Affiliations

  1. Department of Biology, California State University, Los Angeles, California, USA

    Brian Capon

Authors
  1. Paul F. Lofthouse
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  2. Brian Capon
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Lofthouse, P.F., Capon, B. Ultrastructural changes accompanying mitosporogenesis inEctocarpus parvus . Protoplasma 84, 83–99 (1975). https://doi.org/10.1007/BF02075945

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  • DOI: https://doi.org/10.1007/BF02075945

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