Skip to main content

Thank you for visiting nature.com. You are using a browser version with limited support for CSS. To obtain the best experience, we recommend you use a more up to date browser (or turn off compatibility mode in Internet Explorer). In the meantime, to ensure continued support, we are displaying the site without styles and JavaScript.

  • Letter
  • Published:

Relation between Extrapolation Number and Apical Cell Number in Gemmae of Marchantia polymorpha L.

Abstract

THE gemmae of Marchantia polymorpha L. are approximately discoidal with two apical notches 180° from each other1,2. An apical notch marks the location of paired apical cells. Radiobiological data on gemmae of Marchantia indicate that the apical growth of a gemma need not necessarily be the only type of growth occurring in the proliferation of a viable outgrowth from a gemma3–5. In addition, it has been shown that cell survival within the irradiated gemma is correlated with nuclear volume differences among the different cells4,5. These results are similar to those reported for the radiosensitivity of ‘higher plants’ by Sparrow and co-workers6–8, Osborne et al.9,10, and Lunden11, although the former authors6–8 state that the volume of the chromosome at interphase is a better index of radiosensitivity than nuclear volume.

This is a preview of subscription content, access via your institution

Access options

Rent or buy this article

Prices vary by article type

from$1.95

to$39.95

Prices may be subject to local taxes which are calculated during checkout

Similar content being viewed by others

References

  1. Fitting, H., Jahrb. Wiss. Botany, 82, 333 (1936).

    Google Scholar 

  2. Halbsguth, W., Biol. Zentr., 72, 52 (1953).

    Google Scholar 

  3. Dickson, H., Ann. Botany, 46, 683 (1932).

    Article  Google Scholar 

  4. Miller, M. W., and Sparrow, A. H., Nature, 204, 596 (1964).

    Article  ADS  CAS  Google Scholar 

  5. Miller, M. W., Sparrow, A. H., and Rogers, A. F., Bryologist, 68, 31 (1965).

    Article  Google Scholar 

  6. Sparrow, A. H., Cuany, R. L., Miksche, J. P., and Schairer, L. A., in Effects of Ionizing Radiations on Seeds, 289 (International Atomic Energy Agency, Vienna, 1961).

    Google Scholar 

  7. Sparrow, A. H., Schairer, L. A., and Sparrow, R. C., Science, 141, 163 (1963).

    Article  ADS  CAS  Google Scholar 

  8. Sparrow, A. H., Sparrow, R. C., Thompson, K. H., and Schairer, L. A., Radiation Botany, Suppl. 1, 101 (1965).

  9. Osborne, T. S., and Lunden, A. O., Science, 145, 710 (1964).

    Article  ADS  CAS  Google Scholar 

  10. Osborne, T. S., and Lunden, A. O., Radiation Botany, Suppl. 1, 133 (1965).

  11. Lunden, A. O., Radiation Botany, 4, 429 (1964).

    Article  Google Scholar 

  12. Miller, M. W., Bryologist, 67, 317 (1964).

    Article  Google Scholar 

  13. Atwood, K. C., and Norman, A., Proc. U.S. Nat. Acad. Sci., 35, 696 (1949).

    Article  ADS  CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

Authors

Rights and permissions

Reprints and permissions

About this article

Cite this article

MILLER, M. Relation between Extrapolation Number and Apical Cell Number in Gemmae of Marchantia polymorpha L.. Nature 210, 748–749 (1966). https://doi.org/10.1038/210748b0

Download citation

  • Issue Date:

  • DOI: https://doi.org/10.1038/210748b0

Comments

By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.

Search

Quick links

Nature Briefing

Sign up for the Nature Briefing newsletter — what matters in science, free to your inbox daily.

Get the most important science stories of the day, free in your inbox. Sign up for Nature Briefing