Arabidopsis thaliana
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA316599 | ENA |
REPOSITORIES: ENA
Similar Datasets
Project description:The Arabidopsis thaliana transcription factor LATERAL ORGAN BOUNDARIES (LOB) is expressed in the boundary between the shoot apical meristem and initiating lateral organs. To identify genes regulated by LOB activity, we used an inducible 35S:LOB-GR line. This analysis identified genes that are differentially expressed in response to ectopic LOB activity. 35S:LOB-GR and Col wild-type seedlings were treated with dexamethasone (DEX) or mock-treated. Three biological replicates were conducted for each treatment.
2011-12-07 | E-GEOD-34209 | biostudies-arrayexpress
Project description:To obtain information on which genes are regulated by an Arabidopsis transcription factor Dof3.2, we treated Arabidopsis transgenic 35S::Dof3.2-GR seedlings with dexamethasone (DEX), then performed DNA microarray analyses. T3 homozygous Dof3.2-GR transgenic line was used.
2020-03-01 | GSE58064 | GEO
Project description:A glucocorticoid-regulated BBM protein (35S:BBM-GR) was used in combination with microarray analysis to identify genes directly activated by BBM. We employed the system described by (Lloyd et al., 1994) in which dexamethasone (DEX) and cycloheximide (CHX) are applied together to respectively, induce nuclear localization of the BBM-GR protein and prevent translation of the primary targets mRNAs. In this way it is possible to identify direct targets of a transcriptional activator by comparing gene expression profiles between DEX+CHX-treated transgenic and wild-type tissues. The ability of the 35S:BBM GR construct to induce somatic embryogenesis in Arabidopsis seedlings was determined by phenotypic observation of 35S:BBM GR seeds germinated and grown in the presence of 10 µM dexamethasone (DEX). As in 35S:BBM seedlings, we observed somatic embryo formation on the cotyledons, first leaves and shoot meristem of DEX-treated 35S:BBM GR seedlings. We identified a set of 20 genes (including BBM itself) and our analysis indicates that BBM directly activates a signaling pathway comprising transcription factors and other signaling molecules, but which does not initially include genes known to induce somatic embryogenesis, such as LEC1, LEC2 or WUS. The functions of the BBM target genes are unknown, however a number of them have recently been identified in microarray screens for meristem-expressed genes. The identification of BBM-interacting partners and downstream targets provides new tools for unraveling pathways related to plant cell growth and organogenesis. Keywords: transcriptional activation
2008-09-22 | GSE3399 | GEO
Project description:In Arabidopsis thaliana, cytokinin responsive B-type ARR transcription factors and HD-ZIP III transcription factors such as REVOLUTA (REV), act cooperatively as master regulators of shoot regeneration. To identify the downstream targets of ARR-HD-ZIP III transcriptional complex, we used an inducible line of REV, 35S::FLAG-GR-rREV, in which FLAG-tagged miR165/6-non-targetable form of REV (rREV)-GR fusion protein was expressed from 35S promoter. DEX treatment induced activation of REV by translocation of FLAG-GR-rREV fusion protein from cytoplasm to the nucleus. We treated 35S::FLAG-GR-rREV seedlings with 6-benzylaminopurine (6-BA, a cytokinin), dexamethasone (DEX), or 6-BA+DEX for 2 hours. Total RNAs were extracted and subjected to Agilent Arabidopsis Gene Expression Microarray analyses. The differentially expressed genes (>1.5-fold, p<0.05) were identified.
2014-01-29 | GSE54469 | GEO
Project description:Global expression of the Arabidopsis transcriptional regulator SHOOT MERISTEMLESS (STM) in a 35S:STM-GR transgenic line was induced for 3 hours with dexamethasone (DEX) compared to mock-induced (DMSO) control. Additionally,to identify direct targets, plants were treated with the protein synthesis inhibitor cycloheximide (CHX) together with DEX, compared to CHX treatment alone.
2018-05-29 | E-MTAB-6786 | biostudies-arrayexpress
Project description:A glucocorticoid-regulated BBM protein (35S:BBM-GR) was used in combination with microarray analysis to identify genes directly activated by BBM. We employed the system described by (Lloyd et al., 1994) in which dexamethasone (DEX) and cycloheximide (CHX) are applied together to respectively, induce nuclear localization of the BBM-GR protein and prevent translation of the primary targets mRNAs. In this way it is possible to identify direct targets of a transcriptional activator by comparing gene expression profiles between DEX+CHX-treated transgenic and wild-type tissues. The ability of the 35S:BBM GR construct to induce somatic embryogenesis in Arabidopsis seedlings was determined by phenotypic observation of 35S:BBM GR seeds germinated and grown in the presence of 10 µM dexamethasone (DEX). As in 35S:BBM seedlings, we observed somatic embryo formation on the cotyledons, first leaves and shoot meristem of DEX-treated 35S:BBM GR seedlings. We identified a set of 20 genes (including BBM itself) and our analysis indicates that BBM directly activates a signaling pathway comprising transcription factors and other signaling molecules, but which does not initially include genes known to induce somatic embryogenesis, such as LEC1, LEC2 or WUS. The functions of the BBM target genes are unknown, however a number of them have recently been identified in microarray screens for meristem-expressed genes. The identification of BBM-interacting partners and downstream targets provides new tools for unraveling pathways related to plant cell growth and organogenesis. Keywords: transcriptional activation To identify candidate BBM targets, we treated 4 day old 35S:BBM-GR seedlings for 8 hours with 10 µM DEX in the presence of 10 µM CHX and compared the mRNA population from these seedlings using Arabidopsis Operon microarrays (http://www.ag.arizona.edu/microarray/) to that of 4 day old wild-type seedlings treated in the same way. The seed batches used in this analysis showed 100% EFS when grown continuously on media with 10 µM DEX. Four day old seedlings were chosen as the experimental material because they are highly responsive to BBM GR activation and provide sufficient RNA for the microarray experiments. The biological reproducibility of the data was monitored using two independent single locus 35S:BBM GR lines. The technical reproducibility of the data was monitored using two independently DEX + CHX-treated samples from each transgenic line. Dye effects were monitored in a dye-swap experiment using one of the four RNA samples from the two biological replicates
2010-06-25 | E-GEOD-3399 | biostudies-arrayexpress
Project description:The Arabidopsis thaliana Myb transcription factor, FE, acts as a key regulator of phase transition. In order to identify potential target genes of FE protein, we performed microarray experiments. Using fe-1 and transgenic plants overexpressing GR-tagged FE (35S::FE-GR), we compared transcriptional profiling of WT (L.er) vs fe-1 and Dex-treated 35S::FE-GR vs Mock-treated 35S::FE-GR. Transcriptional profiling of A. thaliana comparing WT (L.er) with the fe-1 mutant
2017-01-01 | GSE42862 | GEO
Project description:In Arabidopsis thaliana, cytokinin responsive B-type ARR transcription factors and HD-ZIP III transcription factors such as REVOLUTA (REV), act cooperatively as master regulators of shoot regeneration. To identify the downstream targets of ARR-HD-ZIP III transcriptional complex, we used an inducible line of REV, 35S::FLAG-GR-rREV, in which FLAG-tagged miR165/6-non-targetable form of REV (rREV)-GR fusion protein was expressed from 35S promoter. DEX treatment induced activation of REV by translocation of FLAG-GR-rREV fusion protein from cytoplasm to the nucleus. We treated 35S::FLAG-GR-rREV seedlings with 6-benzylaminopurine (6-BA, a cytokinin), dexamethasone (DEX), or 6-BA+DEX for 2 hours. Total RNAs were extracted and subjected to Agilent Arabidopsis Gene Expression Microarray analyses. The differentially expressed genes (>1.5-fold, p<0.05) were identified. 10-day-old 35S::FLAG-GR-rREV plants were treated with 6-benzylaminopurine (6-BA), dexamethasone (DEX), or 6-BA+DEX for 2 hours. DEX treatment induced activation of REV by translocation of FLAG-GR-rREV fusion protein from cytoplasm to the nucleus. Total RNA was extracted with RNeasy Mini Kit and hybridized to Agilent Arabidopsis Gene Expression Microarray. Differentially expressed genes were defined by a 1.5-fold expression difference with a P value<0.05. Biological replicates were performed.
2014-01-29 | E-GEOD-54469 | biostudies-arrayexpress
Project description:Transcriptional profiling of 35S::FYF+GR transgenic plant's floral buds(DEX treat) compared to 35S::FYF+GR transgenic plant's floral buds(mock treat). DEX : Dexamethasone
2015-06-01 | GSE69411 | GEO
Project description:The WOX1 transcription factor is a multifunctional regulator of lateral-organ development that acts as a transcriptional repressor. WOX1 promotes lamina growth, controls marginal tissue differentiation and is involved in establishment and maintenance of the adaxial-abaxial pattern from the middle domain of leaf primordia. To identify the WOX1 downstream genes, we performed a microarray analysis of shoot apices of transgenic Arabidopsis thaliana lines harboring 35S::WOX1:glucocorticoid receptor (GR) in which the WOX1 function was temporarily enhanced by dexamethasone (DEX).
2018-05-11 | GSE79647 | GEO