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Reproduction in Bulbochaete hiloensis (Nordst.) Tiffany

I. Structure of the zoospore

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Summary

  1. 1.

    The ellipsoid to subspherical zoospore of Bulbochaete hiloensis (Nordst.) Tiffany consists of a green body surmounted by a dome-shaped colourless head, around the base of which is a ring of flagella.

  2. 2.

    The body cytoplasm is characterized by a reticulated chloroplast which contains stacked thylakoids; incipient, developing and mature pyrenoids; and microtubules. The remaining cytoplasm contains active ER-Golgi complexes, coated vesicles, dense bodies, cored bodies, a mitochondrial nest, large central nucleus and lipid-like bodies, adjacent to the large vacuoles.

  3. 3.

    The colourless head, packed with mitochondria, has an extensive ER-Golgi system and a mass of vesicles thought to contain mucopolysaccharides.

  4. 4.

    The flagellar apparatus contains approximately forty regularly-spaced basal bodies situated below a banded fibrous ring. Between the basal bodies are located striated ascending roots, microtubular descending roots and supporting structures.

  5. 5.

    Zoospores are positively phototactic and it is suggested that motility is directed either through differential flagellar activity or by an internal steering mechanism affected by reorientation of the flagellar apparatus.

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Authors and Affiliations

  1. Electron Microscope Unit, Department of Botany and Zoology, University of Manchester, England

    B. Retallack & R. D. Butler

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  1. B. Retallack
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  2. R. D. Butler
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Retallack, B., Butler, R.D. Reproduction in Bulbochaete hiloensis (Nordst.) Tiffany. Archiv. Mikrobiol. 86, 265–280 (1972). https://doi.org/10.1007/BF00424984

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  • DOI: https://doi.org/10.1007/BF00424984

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