Plant Molecular Biology

, Volume 73, Issue 1–2, pp 27–36 | Cite as

Axillary bud outgrowth in herbaceous shoots: how do strigolactones fit into the picture?

  • Tanya Waldie
  • Alice Hayward
  • Christine Anne Beveridge


Strigolactones have recently been identified as the long sought-after signal required to inhibit shoot branching (Gomez-Roldan et al. 2008; Umehara et al. 2008; reviewed in Dun et al. 2009). Here we briefly describe the evidence for strigolactone inhibition of shoot branching and, more extensively, the broader context of this action. We address the central question of why strigolactone mutants exhibit a varied branching phenotype across a wide range of experimental conditions. Where knowledge is available, we highlight the role of other hormones in dictating these phenotypes and describe those instances where our knowledge of known plant hormones and their interactions falls considerably short of explaining the phenotypes. This review will focus on bud outgrowth in herbaceous species because knowledge on the role of strigolactones in shoot branching to date barely extends beyond this group of plants.


Shoot branching Apical dominance Strigolactone Auxin Decapitation Light Nutrient Flowering 



We thank the Australian Research Council for grant funding and the Australian Postgraduate Award scheme for funding to AH and TW.


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© Springer Science+Business Media B.V. 2010

Authors and Affiliations

  • Tanya Waldie
    • 1
  • Alice Hayward
    • 1
  • Christine Anne Beveridge
    • 1
  1. 1.School of Biological Sciences and Australian Research Council Centre of Excellence in Integrative Legume ResearchThe University of QueenslandBrisbaneAustralia

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