- Scientific Correspondence
- Published:
- Colin Dawson1,
- Julian F. V. Vincent1 &
- Anne-Marie Rocca2
Nature volume390,page 668 (1997)Cite this article
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Abstract
The scales of seed-bearing pine cones move in response to changes in relative humidity. The scales gape open when it is dry, releasing the cone's seeds1. When it is damp, the scales close up. The cells in a mature cone are dead, so the mechanism is passive: the structure of the scale and the walls of the cells composing the scale respond to changing relative humidity. Dissection of cones from the Monterey pine, Pinus radiata, revealed to us two types of scale growing from the main body of the cone — the ovuliferous scale and the bract scale. The larger ovuliferous scales respond to changes in relative humidity when removed from the body of the cone.
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References
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Authors and Affiliations
Centre for Biomimetics, University of Reading, Reading, RG6 6AT, UK
Colin Dawson&Julian F. V. Vincent
Defence Clothing and Textile Agency, Flagstaff Road, Colchester, CO2 7SS, Essex, UK
Anne-Marie Rocca
Authors
- Colin Dawson
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- Julian F. V. Vincent
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- Anne-Marie Rocca
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Cite this article
Dawson, C., Vincent, J. & Rocca, AM. How pine cones open. Nature 390, 668 (1997). https://doi.org/10.1038/37745
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DOI: https://doi.org/10.1038/37745
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