Use of Growing Degree Days to Time Root Developmental Events in the Gramineae

  • Betty Klepper
  • R. W. Rickman
  • S. E. Waldman
  • D. A. Ball
Part of the Basic Life Sciences book series (BLSC, volume 65)

Abstract

Root development can be related to shoot development in cereals such as winter wheat (Triticum aestivum L.). Individual root axes can be seen to arise from specific nodes and can be identified using a naming system that relates the axis to a node and to a direction of growth with respect to that node. Aphyllochron system can then be used to relate the appearance of specific seminal and crown root axes to main stem leaf number. The general pattern of root axis appearance for grasses is therefore predictable based on a growing degree day (heat unit) calculation and specific root axes are observable at specific points in shoot development. This pattern can be generalized from wheat to other grasses for use by modellers and morphologists.

References

  1. Ball, D. A., B. Klepper, and D. J. Rydrych. 1995. Comparative above-ground development rates for several annual grass weeds and cereal grains. Weed Sci. 43:410–416.Google Scholar
  2. Dotray, P. A., and F. L. Young. 1993. Characterization of root and shoot development of jointed goatgrass (Aegilops cylindrica). Weed Sci. 41:353–361.Google Scholar

Copyright information

© Springer Science+Business Media New York 1997

Authors and Affiliations

  • Betty Klepper
    • 1
  • R. W. Rickman
    • 1
  • S. E. Waldman
    • 1
  • D. A. Ball
    • 1
  1. 1.USDA, Agricultural Research ServiceOregon State University Columbia Basin Agricultural Research CenterPendleton

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