1887

Abstract

SUMMARY: Nuclei of different diameters, containing different numbers of chromosomes, are found in all macroscopic plasmodia of the true slime mould The relative proportions of small and large nuclei vary in different plasmodial clones. Over extended periods of time 6 wild-type clones maintain a constant proportion of small nuclei whereas 2–1, a yellow mutant, does not. Nuclear fusion (syngamy) does not occur prior to plasmodium formation in this isolate; neither is it delayed until the plasmodium has formed. The rate of formation of large nuclei in plasmodia was calculated. When plasmodia with differing nuclear size ratios were fused, the observed shifts in the nuclear size ratio suggested the possibility that parasexual processes could exist in the isolate under study.

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1970-11-01
2024-04-26
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References

  1. Guttes E., Guttes S. 1969; Replication of nucleolus-associated DNA during G2 Phase in Physarum polycephalum . Journal of Cell Biology 43:229–236
    [Google Scholar]
  2. Kerr N. 1961; A study of plasmodium formation by the true slime mould Didymium nigripes . Experimental Cell Research 23:603–611
    [Google Scholar]
  3. Kerr N. 1965; Disappearance of a genetic marker from a cytoplasmic hybrid plasmodium of a true slime mould. Science; New York: 1471586–1588
    [Google Scholar]
  4. Kerr N., Waxlax J. 1968a; The fusion of plasmodia of a true slime mould grown on various nutrients and the mixing of fused plasmodia. Transactions of the American Microscopical Society 87:197–200
    [Google Scholar]
  5. Kerr N., Waxlax J. 1968b; A yellow variant of the Eumycetozoan Didymium nigripes which exhibits ageing. Journal of Experimental Zoology 168:351–361
    [Google Scholar]
  6. Kerr S. 1967; A comparative study of mitosis in amoebae and plasmodia of the true slime mould Didymium nigripes . Journal of Protozoology 14:439–445
    [Google Scholar]
  7. Kerr S. 1968a Cytological observations on plasmodial differentiation in the true slime mould Didymium nigripes. PhD. Dissertation University of Minnesota:
    [Google Scholar]
  8. Kerr S. 1968b; Ploidy level in the true slime mould Didymium nigripes . Journal of General Microbiology 53:9–15
    [Google Scholar]
  9. Koevenig J. L., Jackson R. C. 1966; Plasmodial mitosis and polyploidy in the Myxomycete Physarum polycephalum . Mycologia 53:662–667
    [Google Scholar]
  10. Nygaard O. F., Guttes S., Rusch H. P. 1960; Nucleic acid metabolism in a slime mould with synchronous mitosis. Biochimica et Biophysica Acta 38:298–306
    [Google Scholar]
  11. Pontecorvo G. 1958 Trends in Genetic Analysis pp. 119–124 New York: Columbia University Press;
    [Google Scholar]
  12. Ross I. K. 1966; Chromosome numbers in pure and gross cultures of Myxomycetes. American Journal of Botany 53:712–718
    [Google Scholar]
  13. Therrien C. D. 1966; Microspectrophotometric measurement of nuclear deoxyribonucleic acid content in two myxomycetes. Canadian Journal of Botany 44:1667–1675
    [Google Scholar]
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