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Glycine max

ABSTRACT: Methylation Changes in Soybean Mid-Maturation Seed Parts

PROVIDER: PRJNA178372 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR575485.fastq.gz	Fastqsanger.gz
	SRR575486.fastq.gz	Fastqsanger.gz
	SRR605192.fastq.gz	Fastqsanger.gz
	SRR607276.fastq.gz	Fastqsanger.gz
	SRR607277.fastq.gz	Fastqsanger.gz

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Project description:What methylation changes are occurring during seed development largely remains unknown. To uncover the possible role of DNA methylation during the transition from seed differentiation to maturation and dormany in soybean, we characterized the methylome of whole seeds representing the differentiation (GLOB stage), maturation (early- (EM), mid- (B1) and late- (AA1) maturation stages), and dormancy (DRY stage) phases of soybean seed development using Illumina sequencing. In addition, we characterized the methylome of the mid-maturation stage embryonic axis (B1-AX) to examine methylation differences, if any, between an embryonic region compared to the whole seed. Illumina sequencing of bisulfite-converted genomic DNA from globular stage (GLOB), early-maturation stage (EM), mid-maturation stage (B1), and late-maturation stage (AA1) seeds, dormancy stage (DRY) and mid-maturation embryonic axis (B1-AX).

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Project description:Soybean (Glycine max) seeds are an important source of seed storage compounds, including protein, oil, and sugar used for food, feed, chemical, and biofuel production. We assessed detailed temporal transcriptional and metabolic changes in developing soybean embryos to gain a systems biology view of developmental and metabolic changes and to identify potential targets for metabolic engineering. Two major developmental and metabolic transitions were captured enabling identification of potential metabolic engineering targets specific to seed filling and to desiccation. The first transition involved a switch between different types of metabolism in dividing and elongating cells. The second transition involved the onset of maturation and desiccation tolerance during seed filling and a switch from photoheterotrophic to heterotrophic metabolism. Clustering analyses of metabolite and transcript data revealed clusters of functionally related metabolites and transcripts active in these different developmental and metabolic programs. The gene clusters provide a resource to generate predictions about the associations and interactions of unknown regulators with their targets based on guilt-by-association relationships. The inferred regulators also represent potential targets for future metabolic engineering of relevant pathways and steps in central carbon and nitrogen metabolism in soybean embryos and drought and desiccation tolerance in plants.

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Expression profiling of Glycine max seed maturation by high throughput sequencing

Project description:A transcriptome analysis of soybean seeds harvested at different developing stages (between stage 7.1 and stage 9) was carried out to understand the molecular events occuring during the acquisition of seed longevity during maturation.

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Lignin deposits in xylem vessels of pedicel regulate water transport during seed maturation in soybean (Glycine max L. Merr.)

Project description:Seed desiccation during maturation is important process for seed post-maturation behavior and harvest. However, the desiccation mechanism in soybean seed maturation is hardly known. In this study, water content in seed, pod and pedicel decreased faster than that in peduncle and stem. Therefore, we focus on the pedicel during seed maturation. By morphological analysis, the deposits in xylem vessels were confirmed in pedicel at 61 day after flowering (DAF), when there are not the deposits in peduncle. It was clarified by microarray analysis that lignin biosynthesis related genes expressed in pedicel at 61 DAF. Indeed, GmPAL, Gm4CL, GmC3H and GmCAD, which are lignin biosynthesis related genes, increased in pedicel during seed maturation. Furthermore, lignin content in pedicel also increased toward at 61 DAF and accumulated in the xylem vessels. These results suggested that lignin deposits into xylem vessels in pedicel cause the soybean seed desiccation during seed maturation.

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