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A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes [Degradome]

ABSTRACT: A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes [Degradome]

PROVIDER: PRJNA486510 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7706263.fastq.gz	Fastqsanger.gz
	SRR7706264.fastq.gz	Fastqsanger.gz
	SRR7706265.fastq.gz	Fastqsanger.gz
	SRR7706266.fastq.gz	Fastqsanger.gz

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A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes [Degradome]

Project description:MicroRNAs are a class of endogeneously expressed non-coding small, ~21nt RNAs involved in the negative regulation of gene expression. In plants, miRNAs are known to play a critical role in developmental and metabolic pathways, as they predominantly target transcription factors. Studies in Arabidopsis and apple have shown that few microRNAs and small interfering (si) RNAs target MYB transcription factors, which are key regulators of phenylpropanoid pathway. However, it is not well-understood how miRNAs mediate regulation of MYBs to produce secondary metabolites such as anthocyanins and flavonoids. Here we show that, a cluster of abundant miRNAs target MYB transcription factors in anthocyanin rich fruits such as grapes. Using RNA-sequencing we establish that grape varieties with high anthocyanin content express abundant MYB-targeting miRNAs resulting in differential expression of MYB proteins among grape varieties, thereby regulating the phenylpropanoid pathway.

2019-10-08 | GSE118701 | GEO

A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (sRNA-Seq)

Project description:MicroRNAs are a class of endogeneously expressed non-coding small, ~21nt RNAs involved in the negative regulation of gene expression. In plants, miRNAs are known to play a critical role in developmental and metabolic pathways, as they predominantly target transcription factors. Studies in Arabidopsis and apple have shown that few microRNAs and small interfering (si) RNAs target MYB transcription factors, which are key regulators of phenylpropanoid pathway. However, it is not well-understood how miRNAs mediate regulation of MYBs to produce secondary metabolites such as anthocyanins and flavonoids. Here we show that, a cluster of abundant miRNAs target MYB transcription factors in anthocyanin rich fruits such as grapes. Using deep small RNA-sequencing we establish that grape varieties with high anthocyanin content express abundant MYB-targeting miRNAs resulting in differential expression of MYB proteins among grape varieties, thereby regulating the phenylpropanoid pathway.

2017-12-20 | GSE107907 | GEO

A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (RNA-Seq)

2017-12-20 | GSE107905 | GEO

A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (RNA-Seq)

Project description:A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (RNA-Seq)

| PRJNA421908 | ENA

A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (sRNA-Seq)

Project description:A cluster of miRNAs regulate MYB repressors to promote anthocyanin accumulation in grapes (sRNA-Seq)

| PRJNA421907 | ENA

The phenylpropanoid pathway is controlled at different branches by a set of R2R3 MYB C2 repressors in grapevine

Project description:A set of grapevine R2R3 MYB repressors negatively regulate the expression of genes involved in different branches of the phenylpropanoid pathway

2014-09-30 | GSE58742 | GEO

Arabidopsis ECAP is a New Adaptor Protein that Connects JAZ Repressors with TPR2 Co-repressor to Suppress Jasmonate-Responsive Anthocyanin Accumulation

Project description:Suppression mechanism employed by transcriptional repressors is commonly existed in diverse phytohormone signaling. In Arabidopsis thaliana, JASMONATE-ZIM DOMAIN (JAZ) proteins act as transcriptional repressors and involve in different aspects of the JA signaling network, through recruiting general co-repressors TOPLESS (TPL) and TPL-related proteins (TPRs). To accomplish overlapping but also finely separated functions of JAZ proteins, specificadaptor proteins are employed in JA signaling. Novel Interactor of JAZ (NINJA) is an adaptor protein mediates gene repression in JA-dependent root growth inhibition and pathogen defense. However, the adaptor protein(s) modulate other JA responsive biological processes is still a mystery. In this study, we demonstrated that a previously uncharacterized protein, ECAP(EAR-Containing Adaptor Protein) that connects JAZ6/8 and TPR to repress JA-mediated anthocyanin accumulation at low JA level. We also found ECAP-mediated transcriptional repression might play a general role in multiple aspects of plant development and responses to environments.

2019-11-07 | GSE125557 | GEO

Subspecialization of R2R3-MYB Repressors for Anthocyanin and Proanthocyanidin Regulation in Forage Legumes.

Project description:The synthesis of anthocyanin pigments and proanthocyanidins (condensed tannins) is regulated by MYB-bHLH-WDR (MBW) transcription factor complexes in all angiosperms studied to date. Tr-MYB133 and Tr-MYB134 were isolated from Trifolium repens and encode R2R3-MYBs that antagonize the activity of MBW activation complexes. These two genes are conserved in other legume species, and form two sub-clades within the larger anthocyanin/proanthocyanidin clade of MYB repressors. However, unlike petunia and Arabidopsis, these R2R3-MYB repressors do not prevent ectopic accumulation of anthocyanins or proanthocyanidins. Instead, they are expressed when anthocyanins or proanthocyanidins are being synthesized, and provide feedback regulation to MBW complexes. This feedback occurs because Tr-MYB133 and Tr-MYB134 are themselves regulated by MBW complexes. Tr-MYB133 is regulated by MBW complexes containing anthocyanin-related R2R3-MYB proteins (Tr-RED LEAF), while Tr-MYB134 is regulated by complexes containing the proanthocyanidin R2R3-MYBs (Tr-MYB14). Other features of the MBW gene regulation networks are also conserved within legumes, including the ability for the anthocyanin MBW complexes to activate the expression of the AN1/TT8 clade bHLH factor. The regulation of Tr-MYB133 and Tr-MYB134 by distinct, pathway-specific MBW complexes has resulted in subspecialization for controlling anthocyanin or proanthocyanidin synthesis.

| S-EPMC4689181 | biostudies-literature

The phenylpropanoid pathway is controlled at different branches by a set of R2R3 MYB C2 repressors in grapevine

Project description:A set of grapevine R2R3 MYB repressors negatively regulate the expression of genes involved in different branches of the phenylpropanoid pathway For the genetic transformation of Vitis vinifera cv Maccabeu, the in vitro plantlets were grown for 90 days under light and temperature controlled. For overexpression of VvMYBC2-L3 in Vitis vinifera cv Maccabeu hairy roots, the cDNA sequence was transferred into the binary vector pH2GW7 by site-specific recombination. The construct was then inserted into Agrobacterium tumefaciens A4 by electroporation and used for the grapevine transformation. The induction and culture of transgenic HRs in grapevine were performed as described by Torregrosa and Bouquet (1997), with modifications reported in Cutanda-Perez et al. (2009).

2014-09-30 | E-GEOD-58742 | biostudies-arrayexpress

Transcriptome and metabolome analysis reveals anthocyanin biosynthesis pathway associated with poplar (Populus deltoids) leaf color formation

Project description:Colored-leaf plants are increasingly popular and have been attracting more and more attentions. However, studies about the anthocyanin components and molecular mechanisms of anthocyanin biosynthesis in QHP and ZSY was still unclear. In present study, an integrated metabolite and transcriptome profiling analysis was performed to explore the anthocyanin compositions and the specific regulatory network of anthocyanin biosynthesis in purple leaves of QHP and ZSY. A total of 39 anthocyanin compounds were detected based on the LC-MS/MS analysis. Of these, 12 cyanidins, 7 pelargonidins, 5 delphindins, and 5 procyanidins are the major anthocyanin compounds, which were significantly differentially accumulated in purple leaves of QHP and ZSY. The major genes associated with anthocyanin biosynthesis, including structural genes and TFs, were differentially expressed in the purple leaves of QHP and ZSY through RNA-seq data analysis, some of which were further assessed by qRT-PCR. Correlation between RNA-seq analysis and metabolite profiling showed that the expression pattern of some differentially expressed genes in anthocyanin biosynthes pathway were closely correlated with the differential accumulation of anthocyanins. In addition, one member of SG5 subgroup of R2R3-MYB TFs, Podel.04G021100, shows a similar expression pattern to some structure genes and closely correlates with sixteen anthocyanin compounds, indicating that the MBY TF (Podel.04G021100) may be involved in the regulation of anthocyanin biosynthesis. The above results not only make us systematic and comprehensive understand the anthocyanin components and corresponding molecular mechanisms of anthocyanin biosynthesis in purple leaves of QHP and ZSY, but also contribute to the promotion and application of anthocyanins in colored-leaf poplars.

2022-10-31 | GSE216754 | GEO

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