Auxin is involved in the regulation of leaf and root development by LAF1 under short day conditions

B. S. Park, W. G. Sang, J. T. Song, B. H. Lee, J. H. Kim, H. S. Seo

Research output: Contribution to journalArticle

Abstract

LAF1 (Long after far-red radiation 1) is a R2R3 Myb transcription factor and a signal transducer of far-red radiation. To investigate the role of LAF1 in leaf and root development, the leaf growth and vein patterning in laf1 mutants under short day conditions were examined. The length of rosette leaves was reduced and the width of the midvein was increased in laf1 mutants compared to their wild-type (WT) counterparts. In addition, cell size and cell number were both decreased in the laf1 mutant in comparison to the WT plant. A comparative analysis of gene expression showed that the transcript levels of PIN and IAA genes, encoding auxin carrier and response proteins, were decreased in laf1 mutants. LAF1 expression was also shown to be induced by 1-naphthaleneacetic acid. These results suggest that both auxin transport and auxin responses are impaired in laf1 mutants, and that LAF1 is involved in the regulation of leaf and root development mediated by auxin signaling under short day conditions.

Original languageEnglish (US)
Pages (from-to)647-652
Number of pages6
JournalBiologia Plantarum
Volume55
Issue number4
DOIs
StatePublished - Dec 1 2011
Externally publishedYes

Keywords

  • IAA
  • NAA
  • PIN
  • midvein
  • mutant
  • short day

ASJC Scopus subject areas

  • Plant Science
  • Horticulture

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