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E-GEOD-30712

ABSTRACT: Expression data from Arabidopsis thaliana under dark and far-red light

OTHER RELATED OMICS DATASETS IN: PRJNA154683PRJNA144375PRJNA154685

PROVIDER: E-GEOD-30712 | ExpressionAtlas | 2015-06-01

REPOSITORIES: ExpressionAtlas

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Dataset's files

Source:

			Action	DRS
	E-GEOD-30712-analysis-methods.tsv	Tabular
	E-GEOD-30712-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-30712-configuration.xml	Xml
	E-GEOD-30712-percentile-ranks.tsv	Tabular
	E-GEOD-30712.condensed-sdrf.tsv	Tabular

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1 - 5 of 67

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Genome-wide Binding Site Analysis of FAR-RED ELONGATED HYPOCOTYL 3 Reveals Its Novel Function in Arabidopsis Development

Project description:This SuperSeries is composed of the following subset Series: GSE30711: ChIP-Seq data from Arabidopsis thaliana under dark and far-red light GSE30712: Expression data from Arabidopsis thaliana under dark and far-red light Refer to individual Series

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Expression data from epidermis specific phytochrome B or global phytochrome B line comparing to phyB-9 mutant.

Project description:Seedling hypocotyls display negative gravitropism in the dark but agravitropism in the light. The Arabidopsis thaliana pif quadruple mutant (pifQ), which lacks four PHYTOCHROME-INTERACTING FACTORS (PIFs), is agravitropic in the dark. Endodermis-specific expression of PIF1 rescues gravitropism in pifQ mutant seedlings. Since phytochromes induce light responses by inhibiting PIFs and the COP1-SPA ubiquitin E3 ligase complex in the nucleus, we asked whether phyB can cell autonomously inhibit hypocotyl negative gravitropism in the endodermis. We found that while epidermis-specific expression of PHYB rescues hypocotyl negative gravitropism and all other phyB mutant phenotypes, endodermis-specific expression of PHYB does not. Epidermal phyB induces the phosphorylation and degradation of endodermal PIFs in response to red light. This induces a global gene expression pattern similar to that induced by red light treatment of seedlings expressing PHYB under the control of its own endogenous promoter. Our results imply that epidermal phyB generates an unidentified mobile signal that travels to the endodermis where it promotes PIF degradation and inhibits hypocotyl negative gravitropism.

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