JOURNAL ARTICLE

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

Mark R Doyle, Colleen M Bizzell, Melissa R Keller, Scott D Michaels, Judong Song, Yoo-Sun Noh, Richard M Amasino
Plant Journal 2005, 41 (3): 376-85
15659097
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 ).

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