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Cuc2-identification-Dynamic and specificity of CUP-SHAPED COTYLEDON transcription factors during leaf development

ABSTRACT: ngs2014_39_leafnet2-cuc2-identification-Identification of CUC2 targets-10-days old 35S::CUC2-GR Arabidopsis transgenic line grown in liquid culture have been treated for 6 hours with DEXAMETHASONE 10µM or Mock.

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE184530 | GEO | 2022/05/18

REPOSITORIES: GEO

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cuc2-identification-Dynamic and specificity of CUP-SHAPED COTYLEDON transcription factors during leaf development

Project description:cuc2-identification-Dynamic and specificity of CUP-SHAPED COTYLEDON transcription factors during leaf development

| PRJNA764928 | ENA

CUC2 mutant tissues vs. wild type cuc2-Gnp07_Regeneome_cuc2

Project description:gnp07_regeneome_cuc2 - cuc2 - CUC2 is expressed in meristem. It permits to create organs boundaries. It is also expressed in leave margins. Is there a mecanism meristem like in leave margins? - To compare wt and cuc2 leaf margins. And compare teeth and hollow inside the arabidopsis leaf margin.

2012-06-01 | GSE30260 | GEO

CUC2 mutant tissues vs. wild type cuc2-Gnp07_Regeneome_cuc2

2012-05-31 | E-GEOD-30260 | biostudies-arrayexpress

identification of target genes regulated by cuc2 in a.thaliana shoot apical meristem.-Morphodynamics in Plants: from gene to shape.

Project description:au13-03_cuc2 - identification of target genes regulated by cuc2 in a.thaliana shoot apical meristem. - Identification of genes specifically targeted by the CUC2 transcription factor that defines the margins of the floral meristem of Arabidopsis thaliana. - identify genes specifically targeted by CUP-SHAPED COTYLEDON 2 (CUC2), a transcription factor required for embryonic shoot meristem formation and specification of the organ boundary in A.thaliana

2018-12-01 | GSE121953 | GEO

CUP-SHAPED COTYLEDON1 (CUC1) and CUC2 regulate cytokinin homeostasis to determine ovule number in Arabidopsis.

Project description:Seeds derive from ovules upon fertilization and therefore the total number of ovules determines the final seed yield, a fundamental trait in crop plants. Among the factors that co-ordinate the process of ovule formation, the transcription factors CUP-SHAPED COTYLEDON 1 (CUC1) and CUC2 and the hormone cytokinin (CK) have a particularly prominent role. Indeed, the absence of both CUC1 and CUC2 causes a severe reduction in ovule number, a phenotype that can be rescued by CK treatment. In this study, we combined CK quantification with an integrative genome-wide target identification approach to select Arabidopsis genes regulated by CUCs that are also involved in CK metabolism. We focused our attention on the functional characterization of UDP-GLUCOSYL TRANSFERASE 85A3 (UGT85A3) and UGT73C1, which are up-regulated in the absence of CUC1 and CUC2 and encode enzymes able to catalyse CK inactivation by O-glucosylation. Our results demonstrate a role for these UGTs as a link between CUCs and CK homeostasis, and highlight the importance of CUCs and CKs in the determination of seed yield.

| S-EPMC6184744 | biostudies-literature

Transcriptome analysis of genes regulated by CUP-SHAPED COTYLEDON1 (CUC1) transcription factor in Arabidopsis thaliana

2011-03-31 | GSE27482 | GEO

Insights from ANA-grade angiosperms into the early evolution of CUP-SHAPED COTYLEDON genes.

Project description:Background and aimsThe closely related NAC family genes NO APICAL MERISTEM (NAM) and CUP-SHAPED COTYLEDON3 (CUC3) regulate the formation of boundaries within and between plant organs. NAM is post-transcriptionally regulated by miR164, whereas CUC3 is not. To gain insight into the evolution of NAM and CUC3 in the angiosperms, we analysed orthologous genes in early-diverging ANA-grade angiosperms and gymnosperms.MethodsWe obtained NAM- and CUC3-like sequences from diverse angiosperms and gymnosperms by a combination of reverse transcriptase PCR, cDNA library screening and database searching, and then investigated their phylogenetic relationships by performing maximum-likelihood reconstructions. We also studied the spatial expression patterns of NAM, CUC3 and MIR164 orthologues in female reproductive tissues of Amborella trichopoda, the probable sister to all other flowering plants.Key resultsSeparate NAM and CUC3 orthologues were found in early-diverging angiosperms, but not in gymnosperms, which contained putative orthologues of the entire NAM + CUC3 clade that possessed sites of regulation by miR164. Multiple paralogues of NAM or CUC3 genes were noted in certain taxa, including Brassicaceae. Expression of NAM, CUC3 and MIR164 orthologues from Am. trichopoda was found to co-localize in ovules at the developmental boundary between the chalaza and nucellus.ConclusionsThe NAM and CUC3 lineages were generated by duplication, and CUC3 was subsequently lost regulation by miR164, prior to the last common ancestor of the extant angiosperms. However, the paralogous NAM clade genes CUC1 and CUC2 were generated by a more recent duplication, near the base of Brassicaceae. The function of NAM and CUC3 in defining a developmental boundary in the ovule appears to have been conserved since the last common ancestor of the flowering plants, as does the post-transcriptional regulation in ovule tissues of NAM by miR164.

| S-EPMC3108802 | biostudies-literature

Transcriptome analysis of genes regulated by CUP-SHAPED COTYLEDON1 (CUC1) transcription factor in Arabidopsis thaliana

Project description:Samples 1 & 2: Comparison of gene expression between wild type (ecotype Ler) and 35S:CUC1, in which CUP-SHAPED COTYLEDON1, a master regulator of the shoot meristem and boundary establishment, is constitutively expressed under the cauliflower mosaic virus 35S promoter. Samples 3 & 4: Comparison of gene expression between stm-1 (ecotype Ler) and stm-1 35S:CUC1 RNA was isolated from cotyledons of 5-day-old (for Ler vs 35S:CUC1) or 10-day-old (for stm vs 35S:CUC1stm) seedlings. Two independent biological replicates were analyzed for each comparison.

2011-03-30 | E-GEOD-27482 | biostudies-arrayexpress

Arabidopsis thaliana embryos: wild type vs cuc1 cuc2 double mutant

Project description:Transcriptional profiling of Arabidopsis embryos comparing cuc1-1 cuc2-1 mutant (test) and wild type Ler (reference). Goal was to screen genes regulated by CUC1 and CUC2 transcription factors, which are required for shoot meristem formation and cotyledon separation.

2020-03-19 | GSE147149 | GEO

Gibberellins regulate ovule number through a DELLA-CUC2 complex in Arabidopsis

Project description:Ovule development is a key process for plant reproduction that ensures correct seed production. Understanding the molecular mechanisms that control ovule formation will also provide new approaches to increase crop yield for breeding. Several molecular factors and plant hormones, including gibberellins, are involved in ovule initiation and development. Gibberellins control ovule development by the destabilization of DELLA proteins, whereas DELLA activity has been proved to act as a positive factor for ovule primordia emergence. But the molecular mechanism by which DELLA act remained unknown. Here we have proved that DELLA proteins control ovule initiation by the formation of a protein complex with the CUC2 transcription factor. The DELLA protein GAI requires CUC2 to promote ovule primordia formation, thus GAI would function by its direct protein-protein interaction with CUC2 in cells of the placenta that determine the boundary regions between ovules during pistil development. Analysis of GAI-CUC2 interaction and colocalization in placenta support this hypothesis. Moreover, molecular analysis of the loci at which GAI protein may act as transcriptional co-regulators in a CUC2-dependent manner identified a subset of target genes that would be regulated by the GAI-CUC2 complex and contribute to regulate ovule primordia emergence.

2021-12-23 | GSE178414 | GEO

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