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Transcriptome dynamics of protein-coding genes and microRNAs during flower development in Arabidopsis

ABSTRACT: Transcriptome dynamics of protein-coding genes and microRNAs during flower development in Arabidopsis

PROVIDER: PRJNA433948 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR6713210.fastq.gz	Fastqsanger.gz
	SRR6713470.fastq.gz	Fastqsanger.gz
	SRR6713211.fastq.gz	Fastqsanger.gz
	SRR6713471.fastq.gz	Fastqsanger.gz
	SRR6713212.fastq.gz	Fastqsanger.gz

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Transcriptome dynamics of protein-coding genes during flower development in Arabidopsis

Project description:Transcriptome dynamics of protein-coding genes during flower development in Arabidopsis

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Transcriptome dynamics of protein-coding genes during flower development in Arabidopsis

Project description:Flower development is a dynamics process in which floral organs are produced from pools of stem cells residing in meristems (Smyth et al., 1990). In order to obtain a high resolution map of the changes of gene expression during this process thus to provide insights into specific expression patterns and their underlying gene regulatory networks, an inducible system which allows us to obtain synchronized flowers (Wellmer et al., 2006) was used to collect stage-specific floral tissues at four stages (stages 0, 2, 4 and 8) for transcriptome profiling by RNA-seq . These stages represent the status of inflorescence meristem, floral meristem specification, floral organ specification and floral organ differentiation, respectively during Arabidopsis flower development.

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miRNome dynamics during flower development in Arabidopsis

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Project description:We studied early events of flower formation with a temporal resolution by employing a floral induction system to drive synchronised flower development from inflorescence meristem-like tissue (Wellmer et al. (2006)). We generated a developmental time series including vegetative leaf tissue, young developing flowers at zero (t0) and two days after induction of flower development (t2), and fully expanded inflorescences. We analysed histone mark dynamics at those time points and the transcriptomics data presented here served to compare histone mark dynamics to transcriptome dynamics.

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Transcriptome dynamics of protein-coding genes and microRNAs during flower development in Arabidopsis

Project description:This SuperSeries is composed of the SubSeries listed below.

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Developmental dynamics of DNA accessibility during flower development [DNaseI-Seq]

Project description:Development of eukaryotic organisms is controlled by transcription factors that trigger specific and global changes in gene expression programmes. In plants, MADS-domain transcription factors act as master regulators of developmental switches and organ specification. However, the mechanisms by which these factors dynamically regulate the expression of their target genes at different developmental stages are still poorly understood. Here, we characterize the dynamic relationship of chromatin accessibility, gene expression and DNA-binding of two MADS-domain proteins during Arabidopsis flower development. The developmental dynamics of DNA-binding of APETALA1 and SEPALLATA3 is largely independent of chromatin accessibility, and our findings suggest that AP1 acts as M-bM-^@M-^Xpioneer factorM-bM-^@M-^Y that modulates chromatin accessibility, thereby facilitating access of other transcriptional regulators to their target genes. Our data provide a primer to the idea that cellular differentiation in plants can be associated to dynamic changes in chromatin accessibility, as consequence of the action of master transcription factors. We used the AP1-GR system to conduct DNaseI hypersensitivity experiments at different stages of flower development. Samples were generated from tissue in which the AP1-GR protein was induced using a treatment of 1 uM DEX to the shoot apex. The material was collect before treatment and 2, 4 and 8 days after treatment. As control, naked DNA from wild-type inflorescences was used. Experiments were done in two biological replicates. The GSE47981 includes expression data that are complementary to the data in the GSE46986 and GSE46894.

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Project description:Approximately half of all microRNAs reside within intronic regions and are often co-transcribed with their host genes. However, most studies on intronic microRNAs focus on individual microRNAs, and conversely most studies on protein-coding and non-coding genes frequently ignore any intron-derived microRNAs. We hypothesize that the individual components of such multi-genic loci may play cooperative or competing roles in driving disease progression, and that examining the combinatorial effect of these components would uncover deeper insights into their functional importance. To address this, we perform systematic analyses of intronic microRNA:host loci in colon cancer. We observe that the FTX locus, comprising of a long non-coding RNA FTX and multiple intronic microRNAs, is highly upregulated in cancer and demonstrate that cooperativity within this multi-component locus promotes cancer growth. In addition, we show that FTX interacts with DHX9 and DICER and delineate its novel roles in regulating A-to-I RNA editing and microRNA expression. These results show for the first time that a long non-coding RNA can regulate A-to-I RNA editing, further expanding the functional repertoire of long non-coding RNAs. We further demonstrate the inhibitory effects of intronic miR-374b and -545 on the tumor suppressors PTEN and RIG-I to enhance the proto-oncogenic PI3K-AKT signaling. Finally, we show that intronic miR-421 may exert an autoregulatory effect on miR-374b and -545. Taken together, our data unveil the intricate interplay between intronic microRNAs and their host transcripts in the modulation of key signaling pathways and disease progression, adding new perspectives to the functional landscape of multi-genic loci.

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Early flower development

Project description:Early flower development

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Developmental dynamics of DNA accessibility during flower development [DNaseI-Seq]

2014-02-03 | GSE46894 | GEO