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A vascular conducting strand in the early land plant Cooksonia

Abstract

THE late Silurian–early Devonian genus Cooksonia, characterized by smooth isotomously branching axes and solitary, terminal sporangia1, has long been regarded as the archetypal vascular plant because of its age and simplicity of organization. The discovery of stomata, sterome2 and thick-walled spores1,3 in Cooksonia pertoni and C. hemisphaericaconfirmed its land-plant status, but tracheids have never been demonstrated in attached axes4. Here we report on tubes with differentially thickened walls typical of tracheary elements found in the central region of axes of Lower Devonian unequivocal C. pertoni, vindicating Lang's belief that Cooksonia was a vascular plant1.

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References

  1. 1

    Lang, W. H. Phil. Trans. R. Soc. B227, 245–291 (1937).

    Article  Google Scholar 

  2. 2

    Edwards, D., Fanning, U. & Richardson, J. B. Nature 323, 438–440 (1986).

    ADS  Article  Google Scholar 

  3. 3

    Fanning, U., Richardson, J. B. & Edwards, D. Evol. Trends Pl. 2, 13–24 (1988).

    Google Scholar 

  4. 4

    Edwards, D., Bassett, M. G. & Rogerson, E. C. W. Lethaia 12, 313–324 (1979).

    Article  Google Scholar 

  5. 5

    Richardson, J. B., Ford, J. H. & Parker, F. J. Micropalaeont. 3, 109–124 (1984).

    Article  Google Scholar 

  6. 6

    Taylor, W. A. & Taylor, T. N. Am. J. Bot. 74, 437–443 (1987).

    Article  Google Scholar 

  7. 7

    Spurr, A. R. J. Ultrastruct. Res. 26, 31–43 (1969).

    CAS  Article  Google Scholar 

  8. 8

    Kenrick, P. & Edwards, D. Bot J. Linn. Soc. 97, 95–123 (1988).

    Article  Google Scholar 

  9. 9

    Edwards, D., Feehan, J. & Smith, D. G. Bot J. Linn. Soc. 86, 19–36 (1983).

    Article  Google Scholar 

  10. 10

    Richardson, J. B. & Edwards, D. in A Global Standard for the Silurian System (eds Holland, C. H. & Bassett, M. G. ) 216–226 (National Museum of Wales, Cardiff, 1989).

    Google Scholar 

  11. 11

    Raven, J. A. in Advances in Botanical Research (ed. Woodhouse, H.W.) 153–219 (1977).

    Google Scholar 

  12. 12

    Edwards, D. S. Bot J. Linn. Soc. 93, 173–204 (1986).

    Article  Google Scholar 

  13. 13

    Kenrick, P. & Crane, P. R. Bot. Gaz. 152, 335–356 (1991).

    Article  Google Scholar 

Download references

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Edwards, D., Davies, K. & Axe, L. A vascular conducting strand in the early land plant Cooksonia. Nature 357, 683–685 (1992). https://doi.org/10.1038/357683a0

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