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Morphogenesis of Primordia of Lateral Roots

  • Chapter
The Dynamics of Meristem Cell Populations

Part of the book series: Advances in Experimental Medicine and Biology ((AEMB,volume 18))

Abstract

When an angiosperm seed germinates the radicle of the embryo grows out and develops into the primary root; this later becomes a complex structure by giving rise to lateral, or secondary, roots. The emergence of the radicle and the subsequent growth of the primary root show a marked polarity: new cells generated by mitosis and the new growth produced by cell elongation are added almost exclusively along one axis. The primary root shows longitudinal growth. It may be inferred from this observation that 1) the pattern for the future growth of the primary root is established during the period of embryogenesis and 2) the internal physiological conditions necessary to realize this imprinted growth pattern exist in the embryo or are established under normal conditions of germination. All primary growth of the primary root that occurs after radicle emergence perpetuates the initial polarized growth along one axis and the root has the form of a long cylinder with a conical apex.

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Author information

Authors and Affiliations

  1. Department of Biology, McMaster University, Hamilton, Ontario, Canada

    D. Davidson

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  1. D. Davidson
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Editor information

Editors and Affiliations

  1. Department of Radiation Biology and Biophysics School of Medicine and Dentistry, The University of Rochester, Rochester, New York, USA

    Morton W. Miller

  2. Department of Biology, Syracuse University, Syracuse, New York, USA

    Charles C. Kuehnert

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© 1972 Plenum Press, New York

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Davidson, D. (1972). Morphogenesis of Primordia of Lateral Roots. In: Miller, M.W., Kuehnert, C.C. (eds) The Dynamics of Meristem Cell Populations. Advances in Experimental Medicine and Biology, vol 18. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-3207-7_10

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  • DOI: https://doi.org/10.1007/978-1-4684-3207-7_10

  • Publisher Name: Springer, Boston, MA

  • Print ISBN: 978-1-4684-3209-1

  • Online ISBN: 978-1-4684-3207-7

  • eBook Packages: Springer Book Archive

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