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Ascusentwicklung und Meiose bei Lophodermium pinastri (Schrad.) Chev.

Ascus development and meiosis in Lophodermium pinastri (Schrad.) Chev.

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Summary

  1. 1.

    The karyology of Lophodermium pinastri was investigated during ascus development.

  2. 2.

    In the ascocarp (hysterothecium) the asci are developing from basal paraphysate cells. These cells become dikaryotic by nucleus migration after anastomosis. Karyogamy occurs in the young ascal cell.

  3. 3.

    Comparisons with other ascomycetes showed no differences in the meiosis. Chromosome counts suggested a haploid number of n=6 for L. pinastri.

  4. 4.

    Observations were made on ascospore formation by “free cell formation”.

  5. 5.

    For staining the nuclei HCl-Giemsa, or aceto-orcein technique resp. was used.

Zusammenfassung

  1. 1.

    Bei Lophodermium pinastri wurden die karyologischen Verhältnisse im Verlauf der Ascusentwicklung untersucht.

  2. 2.

    Die Asci entwickeln sich in den Fruchtkörpern (Hysterothecien) aus basalen Paraphysenzellen, die zuvor durch Kernwanderung über Anastomosen dikaryotisch wurden. Im jungen Ascus erfolgt die Karyogamie.

  3. 3.

    Die Meiose zeigt gegenüber anderen Ascomyceten keine Besonderheiten. Der haploide Chromosomensatz beträgt für L. pinastri n=6.

  4. 4.

    Beobachtungen über die Ascosporenbildung durch “freie Zellbildung” werden mitgeteilt.

  5. 5.

    Zellkerne und Chromosomen wurden nach dem HCl-Giemsa- bzw. nach dem Acete-Orcein-Verfahren gefärbt.

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Literatur

  • Aragno, M.: Formation et évolution de l'asque chez Rhytisma acerinum (Pers.) Fr. Ber. Schweiz. bot. Ges. 77, 173–186 (1967).

    Google Scholar 

  • Darker, G. D.: A revision of the genera of the Hypodermataceae. Canad. J. Bot. 45, 1399–1444 (1967).

    Google Scholar 

  • Gordon, C. C.: Ascocarpic centrum ontogeny of species of Hypodermataceae of conifers. Amer. J. Bot. 53, 319–327 (1966).

    Google Scholar 

  • Hrushovetz S. B.: Cytological studies of Helminthosporium sativum. Canad. J. Bot. 34, 321–327 (1956).

    Google Scholar 

  • Jones, S. G.: The structure of Lophodermium pinastri (Schrad.) Chev. Ann. Bot. 49, 699–728 (1935).

    Google Scholar 

  • Kimbrough, J. W.: Current trends in the classification of Discomycetes. Bot. Rev. 36, 91–161 (1970).

    Google Scholar 

  • Olive, L. S.: Nuclear behavior during meiosis. In: G. C. Ainsworth and A. S. Sussman (Ed.). The fungi, Vol. I, pp. 143–161. New York-London: Academic Press 1965.

    Google Scholar 

  • Robinow, C. F.: Addendum: Nuclear apparatus and cell structure of rood-shaped bacteria. In: The bacterial cell, R. J. Dubos (Ed.). Cambridge, Mass.: Harvard Univ. Press 1945.

    Google Scholar 

  • Singleton, J. F.: Chromosome morphology and the chromosome cycle in the ascus of Neurospora crassa. Amer. J. Bot. 40, 124–144 (1953).

    Google Scholar 

  • Stephan, B. R.: Karyologische Untersuchungen an keimenden Ascosporen und Hyphenzellen von Lophodermium pinastri (Schrad.) Chev. Arch. Mikrobiol. 67, 318–327 (1969).

    Google Scholar 

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Authors and Affiliations

  1. Institut für Forstgenetik und Forstpflanzenzüchtung der Bundesforschungsanstalt für Forst-und Holzwirtschaft, Schmalenbeck

    B. R. Stephan

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  1. B. R. Stephan
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Stephan, B.R. Ascusentwicklung und Meiose bei Lophodermium pinastri (Schrad.) Chev.. Archiv. Mikrobiol. 77, 331–338 (1971). https://doi.org/10.1007/BF00425035

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  • DOI: https://doi.org/10.1007/BF00425035

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