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Translocation of paclobutrazol and gibberellic acid in Sturt's Desert Pea (Swainsona formosa)

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Abstract

The translocation patterns of paclobutrazol and gibberellic acid were studied by applying these plant growth regulators locally to the main or lateral shoots of Sturt's Desert Pea. Paclobutrazol only reduced the growth of shoots to which it was directly applied indicating that it was readily translocated acropetally within a shoot (via xylem) but not basipetally (via phloem), although some phloem translocation has been reported. Gibberellic acid elongated the main shoot and enhanced apical dominance irrespective of the place of application suggesting it is readily translocated both through xylem and phloem. The translocation patterns did not vary between the main or lateral shoots.

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Authors and Affiliations

  1. Department of Agronomy and Soil Science, University of New England, Armidale, NSW 2351, Australia

    M.M. Hamid

  2. Department of Plant Production, University of Queensland, Gatton, 4345, Australia

    R.R. Williams

Authors
  1. M.M. Hamid
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  2. R.R. Williams
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Hamid, M., Williams, R. Translocation of paclobutrazol and gibberellic acid in Sturt's Desert Pea (Swainsona formosa). Plant Growth Regulation 23, 167–171 (1997). https://doi.org/10.1023/A:1005982002914

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  • DOI: https://doi.org/10.1023/A:1005982002914

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