1887

Abstract

SUMMARY: The spines projecting from the surface of the mature conidia of are hollow and are more or less circular in cross-section. The scanning electron microscope shows blunt tips and disc-like bases. The bases are partially embedded in shallow depressions in the outer wall of the spore. The spines are readily detached during processing for transmission electron microscopy.

Mature ungerminated conidia have 2-layered walls, and contain several nuclei, many mitochondria, numerous lipid bodies and sparse endoplasmic reticulum.

Shortly after being placed in water or a nutrient solution the conidia swell; irregular-shaped food vacuoles develop and the lipid bodies largely disappear. Germination takes place from 1 to 3 hr afterwards. A layer of material, denser than the original inner spore wall, develops over the germ-tube initial and later extends over the germ tube after emergence, tapering just behind the point of emergence to a thin dense line surrounding the entire spore. Both layers of the original spore wall are ruptured by emergence of the germ tube, apparently mechanically. These observations are relevant to the evolution of conidia.

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1970-02-01
2022-05-17
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References

  1. Ainsworth G. C. 1966 Ainsworth & Bisby’s Dictionary of the Fungi 5th Edition 547 Kew: Commonwealth Mycological Institute.;
    [Google Scholar]
  2. Bartnicki-Garcia S. 1968; Cell wall chemistry, morphogenesis and taxonomy of fungi.. Annual Review of Microbiology 22:87
    [Google Scholar]
  3. Bracker C. E. 1966; Discussion. The Fungus Spore Ed. by Madelin M. Colston Papers, no. 18 162
    [Google Scholar]
  4. Bracker C. E. 1967; Ultrastructure of fungi.. Annual Review of Pytopathology 5:343
    [Google Scholar]
  5. Campbell C. K. 1968 Features of the development of Aspergillus fumigatus in culture and in avian aspergillosis Thesis for degree of Ph.D.: University of Bristol.;
    [Google Scholar]
  6. Ekundayo J. A. 1965 Studies on germination of fungus spores, with special reference to sporangiospores of Rhizopus arrhizus Thesis for degree of Ph.D.: University of Ibadan, Nigeria.;
    [Google Scholar]
  7. Ekundayo J. A. 1966; Further studies on germination of sporangiospores of Rhizopus arrhizas. . Journal of General Microbiology 42:283
    [Google Scholar]
  8. Fuller M. S. 1966; Structure of the uniflagellate zoospores of aquatic Phycomycetes.. The Fungus Spore Ed. by Madelin M. Colston Papers, no. 18, 67
    [Google Scholar]
  9. Hawker L. E. 1966; Germination: morphological and anatomical changes.. The Fungus Spore Ed. by Madelin M. Colston Papers, no. 18, 151
    [Google Scholar]
  10. Hawker L. E. 1968; Wall ornamentation of ascospores of species of Elaphomyces as shown by the scanning electron microscope.. Transactions of the British Mycological Society 51:493
    [Google Scholar]
  11. Hawker L. E., Abbott P. McV. 1963; An electron microscope study of maturation and germination of sporangiospores of two species of Rhizopus.. Journal of General Microbiology 32:295
    [Google Scholar]
  12. Hawker L. E., Hendy R. J. 1963; An electron microscope study of germination of conidia of Botrytis cinerea. . Journal of General Microbiology 33:43
    [Google Scholar]
  13. Jensen W. A. 1962 Botanical Histochemistry San Francisco and London: W. H. Freeman and Co.;
    [Google Scholar]
  14. Kawakami N. 1955; Electron microscopy of the spine of genus Cunninghamella. . Bulletin of the Faculty of Engineering, Hiroshima University 4:415
    [Google Scholar]
  15. Madelin M. F. 1966; Discussion. The Fungus Spore Colston Papers, no. 18. 162
    [Google Scholar]
  16. Manocha M. S., Shaw C. 1967; Electron microscopy of uredospores of Melampsora lini and of rust-infected flax.. Canadian Journal of Botany 45:1575
    [Google Scholar]
  17. Marchant R. 1966a; Fine structure and spore germination in Fusarium culmorum. . Annals of Botany 30:441
    [Google Scholar]
  18. Marchant R. 1966b; Wall structure and germination in Fusarium culmorum. . Annals of Botany 30:821
    [Google Scholar]
  19. Marchant R., Robards A. W. 1968; Membrane systems associated with the plasmalemma of plant cells.. Annals of Botany 32:457
    [Google Scholar]
  20. Meier H., Webster J. 1954; An electron microscope study of cysts in the Saprolegniaceae.. Journal of Experimental Botany 5:401
    [Google Scholar]
  21. Moor H. M. 1966; Use of freeze-etching in the study of biological ultrastructure.. International Review of Experimental Pathology 5:179
    [Google Scholar]
  22. Pearse A. G. E. 1953 Histochemistry. Theoretical and Applied London: J. and A. Churchill Ltd.;
    [Google Scholar]
  23. Pore R. S., Pyle C., Larsh H. W., Skvarla J. J. 1969; Aspergillus carneus aleuriospore cell wall ultrastructure.. Mycologia 61:418
    [Google Scholar]
  24. Remsen C. C., Hess W. M., Sassen M. M. A. 1967; Fine structure of germinating conidia of Penicillium megasporium conidia.. Protoplasma 64:439
    [Google Scholar]
  25. Sassen M. M. A., Remsen C. C., Hess W. M. 1967; Fine structure of Penicillium megasporium conidiospores.. Protoplasma 64:75
    [Google Scholar]
  26. Sussman A. S. 1966; Types of dormancy as represented by conidia and ascospores of Neurospora. . The Fungus Spore Ed. by Madelin M. Colston Papers, no. 18, 238
    [Google Scholar]
  27. Tanaka K. 1966; Change in ultrastructure of Aspergillus oryzae conidia during germination.. Journa of General and Applied Microbiology, Tokyo 12:239
    [Google Scholar]
  28. Young T. W. K. 1968; Electron microscope study of the asexual structures of the Mucorales.. Proceedings of the Linnean Society of London 179:1
    [Google Scholar]
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