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Arabidopsis thaliana

ABSTRACT: Transcriptomic analysis of dorso-ventral cell-types of Arabidopsis shoot apical meristem

PROVIDER: PRJNA354618 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR5045310.fastq.gz	Fastqsanger.gz
	SRR5045320.fastq.gz	Fastqsanger.gz
	SRR5045311.fastq.gz	Fastqsanger.gz
	SRR5045321.fastq.gz	Fastqsanger.gz
	SRR5045312.fastq.gz	Fastqsanger.gz

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Transcriptomic analysis of dorso-ventral cell-types of Arabidopsis shoot apical meristem

Project description:Dorso-ventral (DV) patterning at the Shoot Apical meristem (SAM) is essential for organogenesis in Arabidopsis. Dorsal and ventral gene expressed domains are separated by boundaries from where the new organ initiation starts. Here by using cell-types specific transcriptomics approach, we have identified doral, ventral and boundary specific genes in SAM.

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Project description:Shoot apical meristem (SAM) of higher plant composed of a few distinct cell types. All the cells in a mature plant’s SAM derived from 30~35 stem cells reservoir which are located at the tip of the apex. Plants ability to give rise diverse cell types from a pool of pluripotent stem cells requires orchestrated gene network that controls the cell fate commitment during the meristem development. To understand, how gene regulatory networks control cell identities switches during cell differentiation requires resolution in recording their gene expression pattern at single cell resolution. An earlier expression map involving three-cell population of stem cell niche revealed complex expression pattern among the cell types1. We developed this approach further and report here a gene expression map using cell-sorting methods for fluorescent protein marked cells in Arabidopsis shoot. The map covered 10 cell populations. This gene expression map represents data from 10 different cell types from Arabidopsis SAM. It will be first step in defining the function of many unknown genes in model plant Arabidopsis.

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Transcriptome analysis of genes regulated by overexpression of LATERAL ORGAN BOUNDARIES (LOB) in Arabidopsis thaliana

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.

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Project description:A gene expression map of Arabidopsis thaliana shoot apical meristem stem cell niche

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A gene expression map of Arabidopsis thaliana shoot apical meristem stem cell niche

Project description:A gene expression map of Arabidopsis thaliana shoot apical meristem stem cell niche was generated by isolating the specific cell type using the cell sorting methods. We used ap1-1;cal1-1 mutant background to enrich the sufficient number of cells for microarray analysis. Spatial and temporal regulation of gene expression is critical for stem-cell homeostasis. The shoot apical meristems of Arabidopsis thaliana harbor a small set of stem-cells which are surrounded by several million differentiating cells, imposing a severe limitation on the genomic analyses of stem-cell homeostasis. We have employed cell type-specific gene expression profiling that allowed us to generate a high-resolution gene expression map and it has revealed gene expression networks specific to the cell types of the stem-cell niche. We demonstrate that the expression map can be used to predict in vivo gene expression domains to identify novel gene expression patterns. Furthermore, it has revealed molecular pathways that are conserved among plant and animal stem-cell populations. The expression map should guide future reverse genetics experiments, high-resolution analyses of cell-cell communication networks and epigenetic modifications. Keywords: cell type comparison

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Cell type specific gene expression map of Arabidopsis thaliana SAM.

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