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Arabidopsis thaliana

ABSTRACT: Extensive demethylation of repetitive elements during seed development underlies gene imprinting

PROVIDER: PRJNA111577 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR016784.fastq.gz	Fastqsanger.gz
	SRR016785.fastq.gz	Fastqsanger.gz
	SRR016786.fastq.gz	Fastqsanger.gz
	SRR016787.fastq.gz	Fastqsanger.gz
	SRR016788.fastq.gz	Fastqsanger.gz

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Natural epigenetic polymorphisms lead to intraspecific variation in Arabidopsis gene imprinting: small RNA-seq profiling in Arabidopsis thaliana Col, Ler, and Cvi parental and reciprocal F1 hybrid seeds

Project description:Imprinted gene expression occurs during seed development in plants and is associated with differential DNA methylation of parental alleles, particularly at proximal transposable elements (TEs). Imprinting variability could contribute to observed parent-of-origin effects on seed development. We investigated intraspecific variation in imprinting, coupled with analysis of DNA methylation and small RNAs, among three Arabidopsis strains with diverse seed phenotypes. The majority of imprinted genes were parentally biased in the same manner among all strains. However, we identified several examples of allele-specific imprinting correlated with intraspecific epigenetic variation at a TE. We successfully predicted imprinting in additional strains based on methylation variability. We conclude that there is standing variation in imprinting even in recently diverged genotypes due to intraspecific epiallelic variation. These data demonstrate that epiallelic variation and genomic imprinting intersect to produce novel gene expression patterns in seeds.

2014-07-08 | GSE52807 | GEO

Natural epigenetic polymorphisms lead to intraspecific variation in Arabidopsis gene imprinting: BS-seq of Arabidopsis thaliana Col, Ler, and Cvi parental and reciprocal F1 hybrid embryo and endosperm

2014-07-08 | GSE52805 | GEO

2014-07-08 | E-GEOD-52805 | biostudies-arrayexpress

2014-07-08 | E-GEOD-52807 | biostudies-arrayexpress

Natural epigenetic polymorphisms lead to intraspecific variation in Arabidopsis gene imprinting: allele specific mRNA-seq expression profiling in Arabidopsis thaliana Col, Ler, and Cvi parental and reciprocal F1 hybrid embryo and endosperm

Project description:Imprinted gene expression occurs during seed development in plants and is closely tied to differential DNA methylation of maternal and paternal alleles, particularly at proximal transposable elements (TEs). Since the epigenetic modification of TEs can vary within species, we investigated intraspecific variation in imprinting, coupled with analysis of DNA methylation and small RNAs, among three strains of Arabidopsis that display diverse seed size phenotypes. Unexpectedly we found that one strain, Cvi, is globally CG hypomethylated. We discovered three examples of strain-specific imprinting caused by epigenetic variation at a TE. Our data allowed us to predict and experimentally validate an instances of allele-specific imprinting in additional strains based only on methylation patterns. We conclude that numerous differences in imprinting can evolve in highly similar, recently diverged genotypes due to epiallelic variation present within the species. Our data demonstrate that epiallelic variation and genomic imprinting intersect to produce novel gene expression patterns in seeds.

2014-07-08 | GSE52806 | GEO

Arabidopsis thaliana

Project description:Seed development

| PRJNA120379 | ENA

2014-07-08 | E-GEOD-52806 | biostudies-arrayexpress

Arabidopsis thaliana

Project description:Extensive translational regulation during seed germination revealed by translational profiling

| PRJNA275002 | ENA

Extensive imprinted gene expression in Arabidopsis endosperm

Project description:Some flowering plant and vertebrate genes are expressed primarily or exclusively from either the maternal or paternal allele, a phenomenon called genomic imprinting. Flowering plant imprinted gene expression has been described primarily in endosperm, a terminal nutritive tissue consumed by the embryo during seed development or after germination. Imprinted expression in Arabidopsis thaliana endosperm is orchestrated by differences in cytosine DNA methylation between the paternal and maternal genomes, as well as by Polycomb group (PcG) proteins. Currently only eleven imprinted Arabidopsis genes are known. Here we use extensive sequencing of cDNA libraries to identify many new paternally and maternally imprinted genes in A. thaliana endosperm, including transcription factors, proteins involved in hormone signaling, and epigenetic regulators. The imprinted status of many maternally-expressed genes is not altered by mutations in the DNA-demethylating glycosylase DEMETER, the DNA methyltransferase MET1 or the core PcG protein FIE, indicating that these genes are regulated by novel mechanisms or deposited from maternal tissues. We did not find any imprinted genes in the embryo. Our results demonstrate that imprinted gene expression, particularly from the maternal genome, is an extensive, mechanistically complex phenomenon that likely affects multiple aspects of seed development. Epigenetics Examination of genomic imprinting in Arabidopsis endosperm

2011-03-10 | E-GEOD-24644 | biostudies-arrayexpress

Arabidopsis thaliana

Project description:Seed development in LEAFY COTYLEDON1 mutants

| PRJNA87127 | ENA