Two FLX family members are non-redundantly required to establish the vernalization requirement in Arabidopsis.
basic_science · Level V
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- Record sourced from PubMed, PMID 23864009.
- Also identified by DOI 10.1038/ncomms3186 and PMC identifier 3753012.
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Abstract
Studies of natural genetic variation for the vernalization requirement in Arabidopsis have revealed two genes, FRIGIDA and FLOWERING LOCUS C (FLC), that are determinants of the vernalization-requiring, winter-annual habit. In this study, we show that FLOWERING LOCUS C EXPRESSOR-LIKE 4 (FLL4) is essential for upregulation of FLC in winter-annual Arabidopsis accessions and establishment of a vernalization requirement. FLL4 is part of the FLOWERING LOCUS C EXPRESSOR gene family and both are non-redundantly involved in flowering time control. Epistasis analysis among FRIGIDA, FLL4, FLOWERING LOCUS C EXPRESSOR and autonomous-pathway genes reveals that FRIGIDA fve exhibits an extreme delay of flowering compared with fri fve, but mutants in other autonomous-pathway genes do not, indicating that FVE acts most antagonistically to FRIGIDA. FLL4 may represent a new member of a FRI-containing complex that activates FLC.
Medical subject headings
- Arabidopsis
- Arabidopsis Proteins
- Carrier Proteins
- Flowers
- Gene Expression Regulation, Plant
- MADS Domain Proteins