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E-GEOD-33790

ABSTRACT: The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation [ATH1-121501]

OTHER RELATED OMICS DATASETS IN: PRJNA156451PRJNA150581PRJNA156439

TISSUE(S): Root, Shoot

PROVIDER: E-GEOD-33790 | ExpressionAtlas | 2015-11-27

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-33790-analysis-methods.tsv	Tabular
	E-GEOD-33790-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-33790-configuration.xml	Xml
	E-GEOD-33790-percentile-ranks.tsv	Tabular
	E-GEOD-33790.condensed-sdrf.tsv	Tabular

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The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation

Project description:This SuperSeries is composed of the following subset Series: GSE33790: The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation [ATH1-121501] GSE33996: The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation [At35b_MR] Refer to individual Series

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The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation

Project description:The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation

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Expression data from Arabidopsis thaliana under phosphate starvation stress

Project description:We performed a transcriptomic analysis of Pi starvation responses in Arabidopsis thaliana (Columbia-0) wild type plants under phosphate starvation stress and in plants with altered PHR1(-like) activity, comparing mutants of phr1 and phr1-phl1 grown in phosphate-lacking medium. Results show the central role of PHR1 and functionally redundant members of its family in the control of transcriptional responses to Pi starvation.

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Project description:The response and recovery of Arabidopsis thaliana transcriptome to phosphate starvation [At35b_MR]

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Temporal profiling of the phosphate starvation response in Arabidopsis root hair cells reveals that induction of polycomb target genes does not depend on removal of H3K27me3 or H2A.Z II

Project description:Altered nutrient conditions can trigger massive transcriptional reprogramming in plants, leading to the activation and silencing of thousands of genes. To gain a deeper understanding of the phosphate starvation response and the relationships between transcriptional and epigenetic changes that occur during this reprogramming, we conducted a time-resolved analysis of transcriptome and chromatin alterations in root hair cells of Arabidopsis thaliana during phosphate (P) starvation and subsequent resupply. We found that 96 hours of P starvation causes induction or repression of thousands of transcripts, and most of these recover to pre-starvation levels within 4 hours of P resupply. Among the phosphate starvation-induced genes are many polycomb targets with high levels of H3K27me3 and histone variant H2A.Z. When induced, these genes show increased H3K4me3 consistent with active transcription, but surprisingly minimal loss of H3K27me3 or H2A.Z. These results indicate that the removal of silencing marks is not a prerequisite for activation of these genes. Our data provide a cell type- and time-resolved resource for studying the dynamics of a systemic nutrient stress and recovery and suggest that our current understanding of the switch between silent and active transcriptional states is incomplete.

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