HUA2 is required for the expression of floral repressors in Arabidopsis thaliana

Plant J. 2005 Feb;41(3):376-85. doi: 10.1111/j.1365-313X.2004.02300.x.


The HUA2 gene acts as a repressor of floral transition. Lesions in hua2 were identified through a study of natural variation and through two mutant screens. An allele of HUA2 from Landsberg erecta (Ler) contains a premature stop codon and acts as an enhancer of early flowering 4 (elf4) mutants. hua2 single mutants, in the absence of the elf4 lesion, flower earlier than wild type under short days. hua2 mutations partially suppress late flowering in FRIGIDA (FRI )-containing lines, autonomous pathway mutants, and a photoperiod pathway mutant. hua2 mutations suppress late flowering by reducing the expression of several MADS genes that act as floral repressors including FLOWERING LOCUS C (FLC ) and FLOWERING LOCUS M (FLM ).

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Arabidopsis / genetics*
  • Arabidopsis / growth & development*
  • Arabidopsis Proteins / genetics*
  • Flowers / growth & development*
  • Gene Expression Regulation, Developmental / physiology*
  • Gene Expression Regulation, Plant / physiology*
  • Genes, Homeobox
  • Genetic Variation
  • Genotype
  • Mutation
  • Phenotype
  • Photoperiod
  • Transcription Factors / genetics*


  • Arabidopsis Proteins
  • HUA2 protein, Arabidopsis
  • Transcription Factors