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Ath_Agilent_v1_Riechmann array expression profile AP1-GR ap1cal inflorescences - time series (hours)

ABSTRACT: This experiment describes gene expression after the activation of APETALA1-GR, to study and identify AP1 target genes. We used a 35S:AP1-GR ap1 cal line to induce a synchronized response activating the AP1-GR fusion protein in ap1 cal inflorescence-like meristems through dexamethasone treatment. Tissue samples were collected immediately after the treatment, as well as subsequent timepoints. The expression profiles of the individual samples were then analyzed by gene expression profiling using whole-genome oligonucleotide arrays (Agilent, custom-commercial). Keywords: time course

ORGANISM(S): Arabidopsis thaliana

PROVIDER: GSE20139 | GEO | 2010/04/02

SECONDARY ACCESSION(S): PRJNA129817

REPOSITORIES: GEO

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Project description:This experiment describes gene expression after the activation of APETALA1-GR, to study and identify AP1 target genes. We used a pAP1:AP1-GR ap1 cal line to induce a synchronized response activating the AP1-GR fusion protein in ap1 cal inflorescence-like meristems through dexamethasone treatment. Tissue samples were collected immediately after the treatment, as well as subsequent timepoints. The expression profiles of the individual samples were then analyzed by gene expression profiling using whole-genome oligonucleotide arrays (Agilent, custom-commercial) Four sets of biologically independent tissue samples were collect before DEX-induction (day 0, 0d), as well as at 2 days, 4 days and 8 days after the treatment. Samples for each timepoint and biological replicate were co-hybridized as indicated; one sample was labeled with Cy3 and the other with Cy5. The dyes used for labeling RNA from a given timepoint were switched for two of the replicate experiments, to reduce dye-related artifacts. This experimental setup resulted in a total of 3 hybridizations per set (0days vs 2days, 2days vs 4days, and 4days vs 8days), and an even number (2) of hybridizations of each dye polarity per comparison.

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Project description:This experiment describes gene expression after the activation of APETALA1-GR, to study and identify AP1 target genes. We used a 35S:AP1-GR ap1 cal line to induce a synchronized response activating the AP1-GR fusion protein in ap1 cal inflorescence-like meristems through dexamethasone treatment. Tissue samples were collected immediately after the treatment, as well as subsequent timepoints. The expression profiles of the individual samples were then analyzed by gene expression profiling using whole-genome oligonucleotide arrays (Agilent, custom-commercial). Keywords: time course Four sets of biologically independent tissue samples were collected at 0, 2, 4, 8, and 12 hours after the application of dexamethasone (Dex-; activation of the AP1-GR fusion protein) or a mock solution (Mock-; control). Dex- and Mock-derived samples for each timepoint and biological replicate were co-hybridized; one sample was labeled with Cy3 and the other with Cy5. The dyes used for labeling RNA from a given treatment type (Dex and Mock, at a given timepoint) were switched for two of the replicate experiments, to reduce dye-related artifacts. This experimental setup resulted in a total of 5 hybridizations per set (0h, 2h, 4, 8h, and 12h; Dex vs. Mock at each timepoint), and an even number (2) of hybridizations of each dye polarity per timepoint. The combined ratio data results are available as a supplementary file on the Series record.

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Project description:This experiment describes gene expression after the activation of APETALA1-GR, to study and identify AP1 target genes. We used a 35S:AP1-GR ap1 cal line to induce a synchronized response activating the AP1-GR fusion protein in ap1 cal inflorescence-like meristems through dexamethasone treatment. Tissue samples were collected immediately after the treatment, as well as subsequent timepoints. The expression profiles of the individual samples were then analyzed by gene expression profiling using whole-genome oligonucleotide arrays (non-commercial; Meyerowitz Lab Arabidopsis Operon Array v4). Keywords: time course Four sets of biologically independent tissue samples were collect at 0, 2, 4 ,8, and 12 hours after the application of dexamethasone (Dex-; activation of the AP1-GR fusion protein) or a mock solution (Mock-; control). In each of the biological replicates of the time course experiments, all the samples derived from dexamethasone (Dex)-treated plants were labeled with one dye (i.e., Cy3), and all the samples derived from the corresponding Mock-treated plants were labeled with the alternative dye (i.e., Cy5). The dyes used for labeling RNA from a given treatment type (Dex and Mock) were switched for two of the replicate experiments, to reduce dye-related artifacts. Dex- and Mock-derived samples for each timepoint and biological replicate were co-hybridized. This experimental setup resulted in a total of 5 hybridizations per set (0h, 2h, 4, 8h, and 12h; Dex vs. Mock at each timepoint), and two biological replicate sets labeled with each dye polarity (Mock-Cy3/Dex-Cy5, and vice versa). The combined ratio data results are available as a supplementary file on the Series record.

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Project description:This experiment describes gene expression during early Arabidopsis flower development. We used a 35S:AP1-GR ap1 cal line to induce synchronized flower development by specifically activating the AP1-GR fusion protein in ap1 cal inflorescence-like meristems through dexamethasone treatment. Tissue samples were collected immediately after the treatment, as well as at one-day intervals for the following five days. The expression profiles of the individual samples were then analyzed by gene expression profiling using whole-genome microarrays (Operon). Keywords: time course

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