Hormonal control of shoot branching

This review focuses on the understanding of the control of shoot branching by these three hormones

V. Ongaro; O. Leyser

2007

Scholarcy highlights

  • Bud outgrowth is regulated by the interaction of environmental signals and endogenous ones, such as plant hormones
  • This review focuses on the understanding of the control of shoot branching by these three hormones
  • The plant shoot system is derived from the primary shoot apical meristem, which is established during embryogenesis
  • Using tissue-specific promoters and grafting experiments, it has been shown that the main site of action for AXR1 in bud inhibition is the xylem parenchyma and/or in the interfascicular sclerenchyma of the stem. These tissues encompass the main site for polar auxin transport in the stem, suggesting that auxin levels in the polar transport stream are monitored by this pathway and may be read out through regulation of cytokinin synthesis to regulate bud outgrowth
  • After buds are formed, decisions are made within the plant as to whether to produce new branches or not. These decisions are based on environmental signals received, and endogenous signals produced
  • The unlocking of the signal transduction processes involved is the challenge that was set more than a century ago, and we are still being driven by it today

Need more features? Save interactive summary cards to your Scholarcy Library.