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Ready, steady, go! A sugar hit starts the race to shoot branching.

Abstract
In the classical theory of apical dominance, auxin depletion from the stem releases bud dormancy. Recent studies have revealed a poor correlation between the initial bud release and auxin depletion from the stem after decapitation. Sucrose mobility in plants and its accumulation in buds correlates well with the onset of bud release and is able to trigger bud outgrowth. The diversion of sugars away from axillary buds decreases bud release even where hormones are at levels generally considered conducive to bud release. This impact of sugars on bud outgrowth may be mediated by specific sugar and hormonal signalling pathways.
AuthorsFrançois F Barbier, John E Lunn, Christine A Beveridge
JournalCurrent opinion in plant biology (Curr Opin Plant Biol) Vol. 25 Pg. 39-45 (Jun 2015) ISSN: 1879-0356 [Electronic] England
PMID25938609 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Review)
CopyrightCopyright © 2015 Elsevier Ltd. All rights reserved.
Chemical References
  • Indoleacetic Acids
  • Plant Growth Regulators
  • Sucrose
Topics
  • Carbohydrate Metabolism
  • Gene Expression Regulation, Plant
  • Indoleacetic Acids (metabolism)
  • Plant Development
  • Plant Growth Regulators (metabolism)
  • Plant Physiological Phenomena
  • Plant Shoots (growth & development, physiology)
  • Plant Stems (growth & development, physiology)
  • Plants (metabolism)
  • Signal Transduction
  • Sucrose (metabolism)

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