A diverse and intricate signalling network regulates stem cell fate in the shoot apical meristem

Steven Dodsworth*

*Corresponding author for this work

Research output: Contribution to journalLiterature reviewpeer-review


At the shoot apex of plants is a small region known as the shoot apical meristem (SAM) that maintains a population of undifferentiated (stem) cells whilst providing cells for developing lateral organs and the stem. All aerial structures of the plant develop from the SAM post-embryogenesis, enabling plants to grow in a characteristic modular fashion with great phenotypic and developmental plasticity throughout their lifetime. The maintenance of the stem cell population is intimately balanced with cell recruitment into differentiating tissues through intercellular communication involving a complex signalling network. Recent studies have shown that diverse regulators function in SAM maintenance, many of which converge on the WUSCHEL (WUS) gene. In this review the diverse regulatory modules that function in SAM maintenance are discussed: transcriptional and epigenetic control, hormonal regulation, and the balance with organogenesis. The central role of WUS as an integrator of multiple signals is highlighted; in addition, accessory feedback loops emerge as a feature enabling dynamic regulation of the stem cell niche.

Original languageEnglish
Pages (from-to)1-9
Number of pages9
JournalDevelopmental Biology
Issue number1
Early online date25 Sept 2009
Publication statusPublished - 1 Dec 2009


  • chromatin remodelling
  • cytokinin
  • gibberellin
  • KNOX
  • meristem
  • stem cell


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