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Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species.

ABSTRACT: Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species.

PROVIDER: PRJNA353651 | ENA |

REPOSITORIES: ENA

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Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species.

Project description:Genome-wide landscapes of transcription factor (TF) binding sites (BSs) diverge during evolution, conferring species-specific transcriptional patterns. The rate of divergence varies in different metazoan lineages but has not been widely studied in plants. We identified the BSs and assessed the effects on transcription of FLOWERING LOCUS C (FLC) and PERPETUAL FLOWERING 1 (PEP1), two orthologous MADS-box TFs that repress flowering and confer vernalization requirement in the Brassicaceae species Arabidopsis thaliana and Arabis alpina, respectively. We found the BSs that were conserved in both species, and that these contained a CArG-box that is recognised by MADS-box TFs. The CArG-box consensus at conserved BSs was extended compared to the core motif. By contrast, species-specific BSs usually lacked the CArG-box in the other species. Flowering-time genes were highly overrepresented among conserved targets and their CArG-boxes were widely conserved among Brassicaceae species. Cold-regulated genes (COR) were also overrepresented among targets, but the cognate BSs and the identity of the regulated genes were different in each species. In cold, COR gene transcript levels were increased in flc and pep1-1 mutants compared to wild-type and this correlated with reduced growth in pep1-1. Therefore FLC orthologs regulate a set of conserved target genes mainly involved in reproductive development and were later independently recruited to modulate stress responses in different Brassicaceae lineages. Analysis of TF BSs in these lineages thus distinguishes widely conserved targets representing the core function of the TF from those that were recruited later in evolution.

2018-01-01 | GSE89889 | GEO

Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species

Project description:Genome-wide landscapes of transcription factor (TF) binding sites (BSs) diverge during evolution, conferring species-specific transcriptional patterns. The rate of divergence varies in different metazoan lineages but has not been widely studied in plants. We identified the BSs and assessed the effects on transcription of FLOWERING LOCUS C (FLC) and PERPETUAL FLOWERING 1 (PEP1), two orthologous MADS-box TFs that repress flowering and confer vernalization requirement in the Brassicaceae species Arabidopsis thaliana and Arabis alpina, respectively. We found that only 17% of their BSs were conserved in both species and that these contained a CArG-box that is recognised by MADS-box TFs. The CArG-box consensus at conserved BSs was extended compared to the core motif. By contrast, species-specific BSs usually lacked the CArG-box in the other species. Flowering-time genes were highly overrepresented among conserved targets and their CArG-boxes were widely conserved among Brassicaceae species. Cold-regulated genes (COR) were also overrepresented among targets, but the cognate BSs and the identity of the regulated genes were different in each species. In cold, COR gene transcript levels were increased in flc and pep1-1 mutants compared to wild-type and this correlated with reduced growth in pep1-1. Therefore FLC orthologs regulate a set of conserved target genes mainly involved in reproductive development and were later independently recruited to modulate stress responses in different Brassicaceae lineages. Analysis of TF BSs in these lineages thus distinguishes widely conserved targets representing the core function of the TF from those that were recruited later in evolution.

2018-01-01 | GSE89638 | GEO

Arabis alpina

Project description:Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species

| PRJNA352782 | ENA

Divergence of regulatory networks governed by the orthologous transcription factors FLC and PEP1 in Brassicaceae species.

Project description: Not available

| S-EPMC5754749 | biostudies-literature

Flower development FRI/FLC

Project description:Arabiposis plants with conbinations of different FRIGIDA (FRI) and FLOWERING LOCUS C (FLC) alleles grown in short days (9L:15D) for 30 days at 21°C, then shifted to long days (16L:8D). Genotypes: Columbia wild type (Col-0): fri FLC Columbia with introgressed FRI from Sf-2: FRI FLC Columbia with introgressed FRI and deleted FLC (flc-3): FRI flc Columbia with deleted FLC (flc-3): fri flc Time points: 0, 2, and 4 days after shift to long days Keywords = flowering Keywords: time-course

2003-08-06 | GSE577 | GEO

Transcriptional signatures associated with species divergence in New Zealand Pachycladon (Brassicaceae)

Project description:Transcriptional signatures associated with species divergence in New Zealand Pachycladon (Brassicaceae)

| PRJNA121087 | ENA

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Project description:Brassicaceae species transcriptome analysis

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Transcription profiling of Arabidopsis plants of three different genotypes (FRI FLC, FRI flc and fri flc) induced to flowering by shifting from short day conditions to long day conditions

Project description:Plants of three different genotypes (FRI FLC, FRI flc and fri flc) were induced to flowering by shifting from short day conditions to long day conditions. FRI=FRIGIDA, FLC=FLOWERING LOCUS C.

2005-09-08 | E-TABM-19 | biostudies-arrayexpress

Small RNA-sequencing of primary fibrolamellar carcinoma (FLC), FLC patient-derived xenograft, and maturational liver lineage stages

Project description:Fibrolamellar carcinoma (FLC) is a rare liver cancer. Here we characterized the small RNA expression landscape of primary FLC, a FLC patient-derived xenograft model, and normal maturational liver lineage stages

2019-03-07 | GSE114974 | GEO

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