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RNA methylomes reveal the m6A-mediated regulation of DNA demethylase gene SlDML2 that is required for tomato fruit ripening

ABSTRACT: RNA methylomes reveal the m6A-mediated regulation of DNA demethylase gene SlDML2 that is required for tomato fruit ripening

PROVIDER: PRJNA515828 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR8454090_1.fastq.gz	Fastqsanger.gz
	SRR8454090_2.fastq.gz	Fastqsanger.gz
	SRR8454081_1.fastq.gz	Fastqsanger.gz
	SRR8454081_2.fastq.gz	Fastqsanger.gz
	SRR8454091_1.fastq.gz	Fastqsanger.gz

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RNA methylomes reveal the m6A-mediated regulation of DNA demethylase gene SlDML2 that is required for tomato fruit ripening

Project description:For exploring whether mRNA m6A modification participates in the regulation of tomato fruit ripening, we performed m6A-seq in three tomato fruit samples, including wild-type (WT) at 39 days post-anthesis (DPA) and 42 DPA, and Cnr mutant at 42 DPA, with three biological replicates. mRNA methylome analysis reveals that m6A methylation is a prevalent modification in mRNA of tomato fruit and the m6A sites are predominantly enriched in the stop codon and 3’ untranslated region, where m6A deposition has been proved to negatively correlate with gene expression. Hundreds of ripening-induced and ripening-repressed genes, including the SlDML2, were found to harbour changed m6A levels during fruit ripening or in the Cnr mutant, implicating the involvement of m6A modification in the regulation of fruit ripening.

2019-07-19 | GSE125306 | GEO

Histone demethylase SlJMJ6 promotes fruit ripening by removing H3K27 methylation of ripening-related genes in tomato [RNA-Seq]

Project description:Here, we found that the tomato jmjC domain-containing gene SlJMJ6 encodes a histone lysine demethylase that specifically demethylates H3K27 methylation. Overexpression of SlJMJ6 accelerated fruit ripening in tomato, which is associated with the up-regulated expression of a large number of ripening-related genes. Integrated analysis of RNA-seq and ChIP-seq data identified 55 genes that are targeted directly by SlJMJ6 and transcriptionally up-regulated with decreased H3K27m3 in SlJMJ6 overexpressing (SlJMJ6-OE) fruits. A large number of the SlJMJ6-regulated genes are involved in transcription regulation, ethylene biosynthesis, cell wall degradation, pigment biosynthesis, and hormone signaling. Fourteen ripening-related genes including RIN, ACS4, ACO1, PL, TBG4 were confirmed to be directly regulated by SlJMJ6 through removing H3K27me3. Taken together, these results indicated that SlJMJ6 is a ripening prompting H3K27me3 demethylase that activates the expression of the ripening-related genes by modulating H3K27me3, thereby facilitating fruit ripening in tomato. To our knowledge, this is the first report of the involvement of a histone lysine demethylase in the regulation of fruit ripening.

2020-04-13 | GSE142713 | GEO

Histone demethylase SlJMJ6 promotes fruit ripening by removing H3K27 methylation of ripening-related genes in tomato [ChIP-Seq]

2020-04-13 | GSE142712 | GEO

Effects of the deletion of tomato m6A demethylase SlALKBH2 on m6A RNA methylomes during the initiation of fruit ripeing.

Project description:We conducted m6A-seq on the fruits of both wild-type and slalkbh2 mutants (slalkbh2-25 and slalkbh2-28) at the mature green (MG) stage, which represents the onset of fruit ripening, to identify putative SlALKBH2 targets. Approximately 10,000 high-confidence m6A peaks were identified in the fruit samples of wild-type, slalkbh2-25, and slalkbh2-28, predominantly situated near the stop codons and in the 3’ UTR regions of gene transcripts. Analysis of differential m6A methylomes revealed 117 and 79 hypermethylated m6A peaks in slalkbh2-25 and slalkbh2-28, respectively, along with only 8 and 15 hypomethylated m6A peaks compared to the wild-type. This suggests a notable increase in total m6A methylation under SlALKBH2 deficiency during ripening initiation. These hypermethylated m6A peaks located in numerous gene transcripts that potentially serve as targets of SlALKBH2.

2024-11-16 | GSE268893 | GEO

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato

Project description:Combinational analyses of genome-wide transcription, binding sites and histone H3K4 trimethylation profiles revealed that SlJMJ7 directly binds and represses the expression of a series of key ripening-associated factors, including ethylene biosynthesis genes ACS2/4/8 and ACO2, DNA demethylase DML2, as well as the ripening-related transcription factors RIN and NOR by removal the mark of H3K4-trimethylation. Moreover, SlJMJ7 directly and indirectly modulates the transcription of genes related to diverse physiological traits of fruit ripening.

2021-06-22 | GSE153080 | GEO

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [RNA-seq]

2021-07-10 | GSE148526 | GEO

Histone demethylase SlJMJ7 Integrates DNA demethylation, ethylene signal and major ripening-related transcription factors in coordination of fruit ripening in tomato [ChIP-seq]

2021-07-10 | GSE148525 | GEO

RdDM is involved in epigenetic regulation of strawberry fruit ripening

Project description:DNA methylation is a conserved epigenetic mark that influences diverse biological processes in many eukaryotes. Recently, DNA methylation was proposed to regulate fleshy fruit ripening. Fleshy fruits can be distinguished by their ripening process as climacteric fruits, such as tomatoes, or non-climacteric fruits, such as strawberries. Tomatoes undergo a global decrease in DNA methylation during ripening, due to increased expression of a DNA demethylase gene. The dynamics and biological relevance of DNA methylation during ripening of non-climacteric fruits, or other climacteric fruits, are unknown. Here, we generated and characterized single-base resolution maps of the DNA methylome in strawberry fruit, from immature to ripe stages. We observed an overall loss of DNA methylation during strawberry fruit ripening. Thus, ripening-induced DNA hypomethylation occurs not only in climacteric fruit, but also in non-climacteric fruit. However, we discovered that the mechanisms underlying DNA hypomethylation during ripening of tomato and strawberry are distinct. Unlike in tomatoes, DNA demethylase genes were not up-regulated during ripening of strawberries. Instead, genes involved in RNA-directed DNA methylation were down-regulated during strawberry ripening. Further, ripening-induced DNA hypomethylation was associated with decreased siRNA levels, consistent with reduced RdDM activity. Therefore, we propose that DNA hypomethylation during strawberry ripening is caused by diminished RdDM activity. Finally, hundreds of ripening-related genes displayed altered expression that was associated with, and thus potentially regulated by, DNA hypomethylation during ripening. Our findings provide new insight into the DNA methylation dynamics during the ripening of non-climateric fruit and reveal a novel function of RdDM in regulating an important process in plant development.

2018-11-13 | GSE113084 | GEO

Botrytis cinerea infection accelerates ripening and cell wall disassembly in tomato fruit to promote disease

Project description:Postharvest fungal pathogens benefit from the increased host susceptibility that occurs during fruit ripening. In unripe fruit, pathogens often remain quiescent and unable to cause disease until ripening begins, emerging at this point into destructive necrotrophic lifestyles that quickly result in fruit decay. Here, we demonstrate that one such pathogen, Botrytis cinerea, actively induces ripening processes in order to facilitate infections and promote disease. Assessments of ripening progression revealed that B. cinerea accelerated external coloration, ethylene production, and softening in unripe fruit, while mRNA sequencing of inoculated unripe fruit confirmed the corresponding upregulation of host genes involved in ripening processes, such as ethylene biosynthesis and cell wall degradation. Furthermore, ELISA-based glycomics profiling of fruit cell wall polysaccharides revealed remarkable similarities in the cell wall polysaccharide changes caused by both infections of unripe fruit and ripening of healthy fruit, particularly in the increased accessibility of pectin polysaccharides. Virulence and additional ripening assessment experiments with B. cinerea knockout mutants showed that induction of ripening is dependent on the ability to infect the host and break down pectin. The B. cinerea double knockout Δbcpg1Δbcpg2 lacking two critical pectin degrading enzymes was found to be incapable of emerging from quiescence even long after the fruit had ripened at its own pace, suggesting that the failure to accelerate ripening severely inhibits fungal survival on unripe fruit. These findings demonstrate that active induction of ripening in unripe tomato fruit is an important infection strategy for B. cinerea.

2022-01-01 | GSE183836 | GEO

Critical roles of DNA demethylation in the activation of ripening-induced genes and inhibition of ripening-repressed genes in tomato fruit

Project description:DNA methylation is a conserved epigenetic mark important for genome integrity, development and environmental responses in plants and mammals. Active DNA demethylation in plants is initiated by a family of 5mC DNA glycosylases/lyases (i.e. DNA demethylases). The role of DNA demethylases in transposon regulation, pathogen responses, and gene imprinting and other developmental processes have been studied extensively in the model plant Arabidopsis thaliana. Recent studies suggested a role of active DNA demethylation in fruit ripening in tomato. In this study, we generated loss-of-function mutant alleles of a tomato gene, SlROS1/SlDML1/2, which is a close homolog of the Arabidopsis DNA demethylase gene ROS1. In the fruits of the tomato mutants, increased DNA methylation was found in thousands of genes. These genes include not only hundreds of ripening induced genes but also many ripening repressed genes. Our results show that SlROS1 is critical for tomato fruit ripening, and suggest that active DNA demethylation is required for both the activation of ripening induced genes and inhibition of ripening repressed genes.

2017-05-02 | GSE94903 | GEO

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