The pleiotropic mutation dar1 affects plant architecture in Arabidopsis thaliana

Alessia Para, Annika Sundås-Larsson*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Shoot architecture is shaped upon the organogenic activity of the shoot apical meristem (SAM). Such an activity relies on the balance between the maintenance of a population of undifferentiated cells in the centre of the SAM and the recruitment of organ founder cells at the periphery. A novel mutation in Arabidopsis thaliana, distorted architecture1 (dar1), is characterised by disturbed phyllotaxy of the inflorescence and consumption of the apical meristem late in development. SEM and light microscopy analyses of the dar1 SAM reveal an abnormal partitioning of meristematic domains, and mutations known to affect the SAM structure and function were found to interact with dar1. Moreover, the mutant shows an alteration of the root apical meristem (RAM) structure. Those observations support the hypothesis that DAR1 has a role in meristem maintenance and it is required for the normal development of Arabidopsis inflorescence during plant life.

Original languageEnglish (US)
Pages (from-to)215-225
Number of pages11
JournalDevelopmental Biology
Issue number2
StatePublished - Feb 15 2003


  • Arabidopsis thaliana
  • Plant architecture
  • Shoot apical meristem

ASJC Scopus subject areas

  • Molecular Biology
  • Developmental Biology
  • Cell Biology

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