Auxin triggers transient, local signalling for cell specification in Arabidopsis embryogenesis.

D. Weijers, A. Schlereth, J.S. Ehrismann, G. Schwank, M. Kientz, G. Jürgens

Research output: Contribution to journalArticleAcademicpeer-review

233 Citations (Scopus)

Abstract

The Arabidopsis embryonic root meristem is initiated by the specification of a single cell, the hypophysis. This event critically requires the antagonistic auxin response regulators MONOPTEROS and BODENLOS, but their mechanism of action is unknown. We show that these proteins interact and transiently act in a small subdomain of the proembryo adjacent to the future hypophysis. Here they promote transport of auxin, which then elicits a second response in the hypophysis itself. Our results suggest that hypophysis specification is not the direct result of a primary auxin response but rather depends on cell-to-cell signaling triggered by auxin In adjacent cells
Original languageEnglish
Pages (from-to)265-270
JournalDevelopmental Cell
Volume10
Issue number2
DOIs
Publication statusPublished - 2006

Keywords

  • gene
  • monopteros
  • protein
  • embryo
  • expression
  • root
  • arf
  • transformation
  • movement
  • mutation

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