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Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

ABSTRACT: Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

PROVIDER: PRJNA784945 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR17074233_1.fastq.gz	Fastqsanger.gz
	SRR17074233_2.fastq.gz	Fastqsanger.gz
	SRR17074234_1.fastq.gz	Fastqsanger.gz
	SRR17074234_2.fastq.gz	Fastqsanger.gz
	SRR17074235_1.fastq.gz	Fastqsanger.gz

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Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

Project description:Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

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Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

Project description:In deciduous fruit trees, entrance into dormancy occurs in later summer/fall, concomitantly with the shortening of day length and decrease in temperature. Generally speaking, dormancy can be divided into endodormancy, ecodormancy and paradormancy. In Prunus species flower buds, entrance into the dormant stage occurs when the apical meristem is partially differentiated; during dormancy, flower verticils continue their growth and differentiation. In this work we focused our attention on flower bud development during winter in peach. In order to understand how bud development progress is regulated during winter we integrated cytological epigenetic and chromatin genome wide data with transcriptional outputs to obtained a complete picture of the main regulatory pathways involved in endodormancy.

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Chromatin and transcription dynamics regulate flower development during chilling accumulation in peach buds

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Project description:Bud dormancy – the repeated phase of rest that punctuates periods of growth in the life cycles of many perennial species. In temperate fruit trees, fulfillment of chilling requirement and subsequent heat requirement enable dormant buds to have uniform blooming in field. However, effects of environmental factors such as chilling underlying dormancy release and bud break has not been fully understood. Histone modification is an important epigenetic regulation system which plays an important role in gene expression in various developmental and adaptive processes. Taking advantage of next-generation sequencing, we generated epigenome and transcriptome profiling at different stages before chilling, after chilling and just before bud break in apple (Malus x domestica). We found H3K27me3 may play dominant role during chilling and the genes involved in lignin and lipid metabolic process showed histone modifications. Interestingly, the higher ratio of genes in chilling-associated network exhibited histone modifications, suggesting crucial epigenetic roles in regulating gene expressions in response to chilling during dormancy. Furthermore, H3K4me3 may play more important role during bud break and the genes related to cell wall modification/organization were strongly modified. Taken together, this study provides important insights into the chromatin-based gene regulation underlying chilling-mediated dormancy release and bud break in apple.

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