Arabidopsis Root Development

Marijn Luijten*, Renze Heidstra

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapter

3 Citations (Scopus)

Abstract

In plant development, the basic body plan is laid down during embryogenesis. Development carries on postembryogenically above and below ground with the continuous formation and outgrowth of lateral organs shaping the adult plant. In the past two decades, molecular genetics has been the preferred approach to study Arabidopsis thaliana root development. These efforts have resulted in the identification of numerous genes, involved in as many regulatory processes of root growth and development. Incidentally, conserved mechanisms and genetic factors that act in root and shoot growth have been uncovered, revealing general principles of plant development. Transport-mediated graded distribution of the phytohormone auxin, for example, acts as a global organizer that is locally translated into distinct cellular responses by specific auxin/indole-3-acetic acid-AUXIN RESPONSE FACTOR pairs. In the root, these responses promote expression of the PLETHORA regulators that act dose-dependently in controlling root morphology. The stem cell niche is uniquely defined by the combinatorial activity of the PLETHORA and SHORT-ROOT/SCARECROW transcription factors yet deploy signaling mechanisms that are conserved in root and shoot stem cell maintenance. Perpetual divisions of the stem cells are tightly regulated, interconnecting epigenetic factors, hormonal control and core cell cycle components. In this chapter, we will focus on recent advances in our understanding of Arabidopsis root development. Taking embryogenesis as a starting point, we will describe the genes and mechanisms involved in root meristem and stem cell patterning and maintenance.

Original languageEnglish
Title of host publicationRoot Development
EditorsTom Beeckman
PublisherWiley-Blackwell
Chapter1
Pages1-38
Number of pages38
Volume37
ISBN (Electronic)9781444310023
ISBN (Print)9781405161503
DOIs
Publication statusPublished - 7 Oct 2009
Externally publishedYes

Publication series

NameAnnual Plant Reviews
Volume37

Keywords

  • Cell patterning
  • Embryogenesis
  • PLETHORA genes
  • Root meristem maintenance
  • Root stem cell niche

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