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E-GEOD-122610

ABSTRACT: WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [RNA-seq]

PROVIDER: E-GEOD-122610 | ExpressionAtlas | 2020-04-14

REPOSITORIES: ExpressionAtlas

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			Action	DRS
	E-GEOD-122610-analysis-methods.tsv	Tabular
	E-GEOD-122610-analytics.tsv	Tabular
	E-GEOD-122610-atlasExperimentSummary.Rdata	Rdata
	E-GEOD-122610-configuration.xml	Xml
	E-GEOD-122610-g1_g3-mvaPlot.png	Other

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WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [RNA-seq]

Project description:WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [RNA-seq]

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WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [ChIP-seq]

Project description:WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [ChIP-seq]

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WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis

Project description:WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis

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WUSCHEL acts as a rheostat on the auxin pathway to maintain apical stem cells in Arabidopsis [ChIP-seq]

Project description:During development and growth, dynamic signals need to be translated into spatially precise and temporally stable gene expression states, which define cell fate. In the context of the apical plant stem cell system, local accumulation of the small, highly mobile phytohormone auxin triggers organ initiation. Here we show that the WUSCHEL transcription factor locally protects stem cells from differentiation by controlling the auxin signaling and response pathways via regulation of Histone acetylation. Conversely, low levels of signaling are required for stem cell maintenance, demonstrating that WUSCHEL acts as a rheostat on the auxin pathway. Our results reveal an important mechanism that allows cells to differentially translate a potent and highly mobile developmental signal into appropriate cell behavior with high spatial precision and temporal robustness.

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Project description:Growth of a complex multicellular organism requires coordinated changes in diverse cell types. These cellular changes generate organs of the correct size, shape and functionality. During plant development, the growth hormone auxin induces stem elongation; however, which cell types of the stem perceive the auxin signal and contribute to organ growth is poorly understood. Here, we show that auxin signalling is required in many cell types for correct hypocotyl stem growth, with a key role for the epidermis. Combining genetic manipulations in Arabidopsis thaliana with transcriptional profiling of the hypocotyl epidermis from Brassica rapa, we show that auxin functions in the epidermis in part by inducing activity of the locally-acting, growth-promoting brassinosteroid pathway. Our findings clarify cell-specific auxin function in the hypocotyl, and highlight the complexity of cell-type interactions within a growing organ. We performed whole-genome transcriptome (mRNA-Seq) on 5 d-old W light-grown Arabidopsis thaliana plants (CER6pro>>axr3-1::mCit experimental plants and UAS::axr3-1::mCit hemizygous control plants; whole-seedling tissue) treated for 4 h W light or low R:FR shade. In addition, we performed mRNA-Seq on 4 d-old Brassica rapa plants (FPsc strain) treated for 9 h W light or shade. Brassica tissues collected were hypocotyl epidermal peels or whole hypocotyls.

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