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Acceleration of flowering in Arabidopsis thaliana by Cape Verde Islands alleles of FLOWERING H is dependent on the floral promoter FD
- Source :
- Journal of Experimental Botany
- Publication Year :
- 2013
- Publisher :
- Oxford University Press (OUP), 2013.
-
Abstract
- Flowering time in the model plant Arabidopsis thaliana is regulated by both external environmental signals and internal developmental pathways. Natural variation at the FLOWERING H (FLH) locus has previously been described, with alleles present in the Cape Verde Islands accession causing early flowering, particularly after vernalization. The mechanism of FLH-induced early flowering is not understood. Here, the integration of FLH activity into the known flowering time pathways is described using molecular and genetic approaches. The identification of molecular markers that co-segregated with the FLH locus allowed the generation of multiple combinations of FLH alleles with mutations in flowering time genes in different flowering pathways. Combining an early flowering FLH allele with mutations in vernalization pathway genes that regulate FLC expression revealed that FLH appears to act in parallel to FLC. Surprisingly, the early flowering allele of FLH requires the floral integrator FD, but not FT, to accelerate flowering. This suggests a model in which some alleles of FLH are able to affect the FD-dependent activity of the floral activator complex.
- Subjects :
- Physiology
Arabidopsis
Locus (genetics)
Flowers
Plant Science
Quantitative trait locus
Biology
Cape verde
Gene Expression Regulation, Plant
vernalization
Botany
Allele
Promoter Regions, Genetic
Gene
Transcription factor
Alleles
Genetics
Arabidopsis Proteins
MEF2 Transcription Factors
fungi
Gene Expression Regulation, Developmental
food and beverages
flowering time
Vernalization
biology.organism_classification
quantitative trait loci
FLH
Transcription Factors
Research Paper
Subjects
Details
- ISSN :
- 14602431 and 00220957
- Volume :
- 64
- Database :
- OpenAIRE
- Journal :
- Journal of Experimental Botany
- Accession number :
- edsair.doi.dedup.....f90c657d18a8b10c99fbf2e4efe3549c