Sorghum bicolor
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA513297 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR12628363_1.fastq.gz | Fastqsanger.gz | |||
| SRR12628363_2.fastq.gz | Fastqsanger.gz | |||
| SRR12628364_1.fastq.gz | Fastqsanger.gz | |||
| SRR12628364_2.fastq.gz | Fastqsanger.gz | |||
| SRR12628365_1.fastq.gz | Fastqsanger.gz |
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Project description:The Poaceae family, also known as the grasses, includes agronomically important cereal crops such as rice, maize, sorghum, and wheat. Previous comparative studies have shown that much of the gene content is shared among the grasses; however, functional conservation of orthologous genes has yet to be explored. To gain an understanding of the genome-wide patterns of evolution of gene expression across reproductive tissues, we employed a sequence-based approach to compare analogous transcriptomes in species representing three Poaceae subgroups including the Pooideae (Brachypodium distachyon), the Panicoideae (sorghum), and the Ehrhartoideae (rice). Our transcriptome analyses reveal that only a fraction of orthologous genes exhibit conserved expression patterns. A high proportion of conserved orthologs include genes that are upregulated in physiologically similar tissues such as leaves, anther, pistil, and embryo, while orthologs that are highly expressed in seeds show the most diverged expression patterns. This experiment is related to E-MTAB-4401 (http://www.ebi.ac.uk/arrayexpress/experiments/E-MTAB-4401/) and E-MTAB-4402 (http://www.ebi.ac.uk/arrayexpress/experiments/E-MTAB-4402/)
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Project description:Plant secondary cell walls constitute the majority of plant biomass and are an important source of biomaterials. Secondary cell walls are particularly prominent in xylem cells present in the vascular tissue. Although the process of vascularization has been extensively studied in the dicot Arabidopsis thaliana, remarkably little is known about these processes in grass species despite their emerging importance as biomass feedstocks. The targeted biofuel crop Sorghum bicolor has a sequenced and well-annotated genome, making it an ideal monocot model for addressing vascularization and biomass deposition. Here we generated tissue-specific transcriptome data using laser capture microdissection in the developing vascular and non-vascular tissues of the sorghum root. Many sorghum genes with enriched expression in developing vasculature were orthologous to genes previously associated with vascular development in other species. However, a number of transcription factor families, including NAC domain, MYB and ARF varied in their complement of vascular expressed genes to a considerable degree in sorghum compared to Arabidopsis and/or maize. Differential expression of genes associated with DNA methylation and chromatin modification were identified between vascular and non-vascular cell types, implying that changes in DNA methylation may be a feature of sorghum root vascularization. To profile DNA methylation in these tissues, sodium bisulfite sequencing of laser capture microdissected tissue was performed. DNA methylation was enriched in genic regions of genes demonstrating higher expression in non-vascular tissues. Methylation in genic and intergenic regions varied by tissue type and gene expression level. Furthermore, genes involved in cell elongation showed differences in methylation levels concomitant with expression between non-vascular and vascular tissue types suggesting a novel mode by which root growth in distinct tissues may be modulated. Our results provide both a genetic and epigenetic framework for studying vascularization and secondary cell wall development in sorghum.
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Project description:This study utilized next generation sequencing technology (RNA-Seq and BS-Seq) to examine the transcriptome and methylome of various tissues within sorghum plants with the ultimate goal of improving the Sorghum bicolor annotation
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