E-GEOD-62478
Ontology highlight
ABSTRACT:
PROVIDER: E-GEOD-62478 | ExpressionAtlas | 2020-04-14
REPOSITORIES: ExpressionAtlas
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| E-GEOD-62478-analysis-methods.tsv | Tabular | |||
| E-GEOD-62478-atlasExperimentSummary.Rdata | Rdata | |||
| E-GEOD-62478-coexpressions.tsv.gz | Tabular | |||
| E-GEOD-62478-configuration.xml | Xml | |||
| E-GEOD-62478-factors.xml | Xml |
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Project description:RNA-seq analysis of alternative splicing between two Arabidopsis accessions and its inheritance in hybrid
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Project description:Alternative splicing (AS) plays key roles in plant development and responses to environmental changes. However, the mechanisms underlying AS divergence (differential expression of transcript isoforms resulting from alternative splicing) in plant accessions and its contributions to responses to environmental stimuli remain unclear. In this study, we investigated genome-wide variation of AS in Arabidopsis thaliana accessions Col-0, Bur-0, C24, Kro-0, and Ler-1, as well as their F1 hybrids, and characterized the regulatory mechanisms for AS divergence by RNA sequencing (RNA-seq). We found that most of the divergent AS events in Arabidopsis accessions were cis-regulated by sequence variation, including those in core splice site and splicing motifs. Many genes that differed in AS between Col-0 and Bur-0 were involved in stimulus responses. Further genome-wide association analyses of 22 environmental variables showed that SNPs influencing known splice site strength were also associated with environmental stress responses. These results demonstrate that cis-variation in genomic sequences among Arabidopsis accessions was the dominant contributor to AS divergence, and it may contribute to differences in environmental responses among Arabidopsis accessions.
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Project description:Genome-wide analysis of alternative splicing in Zea mays: landscape and genetic regulation
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Project description:Transcription profiling by high throughput sequencing of two Arabidopsis accessions, Col-0 and Sei-0, and their reciprocal hybrids after infiltration with Pst DC3000
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Project description:CG Methylation of Col, Van and reciprocal hybrids using HpaII and MspI digestion followed by bioprime random labeling, and hybridization to AtTILE1 forward array. Study on constitutive and ploymorphic CG methylation between arabidopsis thaliana accessions Col-0 and Van-0. Study on the inheritance of CG methylation in reciprocal hybrids. Keywords: genomic hybridization
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Project description:Sexual reproduction in angiosperms requires the production and delivery of two male gametes by a three-celled haploid male gametophyte. This demands synchronised gene expression in a short developmental window to ensure double fertilization and seed set. While transcriptomic changes in developing pollen are known for Arabidopsis, no studies have integrated RNA and proteomic data in this model. Further, the role of alternative splicing has not been fully addressed, yet post-transcriptional and post-translational regulation may have a key role in gene expression dynamics during microgametogenesis. We have refined and substantially updated global transcriptomic and proteomic changes in developing pollen for two Arabidopsis accessions. Despite the superiority of RNA-seq over microarray-based platforms, we demonstrate high reproducibility and comparability. We identify thousands of long non-coding RNAs as potential regulators of pollen development, hundreds of changes in alternative splicing and provide insight into mRNA translation rate and storage in developing pollen. Our analysis delivers an integrated perspective of gene expression dynamics in developing Arabidopsis pollen and a foundation for studying the role of alternative splicing in this model.
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2011-05-17 | E-GEOD-24836 | biostudies-arrayexpress
Project description:RNA-Seq analysis of Arabidopsis splicing factor U2AF65 against the wild type (Col).
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Project description:We provide evidence that heterosis for bacterial defense exists in hybrids crossed between some Arabidopsis accessions. Comparison of transcriptomes between hybrids exhibiting heterosis for disease resistance and their parents after inoculation with Pst DC3000 revealed that several key genes involved in salicylic acid (SA) biosynthesis were significantly up-regulated in hybrids. Consistently, in response to bacterial infection, more SA [both free SA and SA glycoside (SAG)] accumulated in hybrids compared with both parents. In addition, heterosis for bacterial defense was significantly compromised in hybrids of pad4 mutants in which the SA biosynthesis pathway was blocked. Moreover, we further revealed that increased histone H3 acetylation of the key genes involved in the SA biosynthesis pathway correlated with their up-regulated expression in hybrids. Around 30 inoculated leaves from Arabidopsis accessions Col-0 and Sei-0 as well as their reciprocal hybrids Fcs and Fsc, which showed best-parent heterosis for bacterial defense were pooled in each sample for mRNA Seq using HiSeq 2000 sequencing system (Illumina)
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