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N6-methyladenosine mRNA methylomes in the MTA RNAi strawberry fruits and the controls

ABSTRACT: N6-methyladenosine mRNA methylomes in the MTA RNAi strawberry fruits and the controls

PROVIDER: PRJNA731153 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR14588678_1.fastq.gz	Fastqsanger.gz
	SRR14588678_2.fastq.gz	Fastqsanger.gz
	SRR14588679_1.fastq.gz	Fastqsanger.gz
	SRR14588679_2.fastq.gz	Fastqsanger.gz
	SRR14588680_1.fastq.gz	Fastqsanger.gz

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N6-methyladenosine mRNA methylomes in the MTA RNAi strawberry fruits and the controls

Project description:For exploring the influence of the m6A methyltransferase gene MTA silencing in the global m6A mRNA methylomes of strawberry fruits, we performed m6A-seq in the MTA RNAi strawberry fruits (RNAi-MTA) and the controls with three independently biological replicates. Results showed that MTA silencing induces the m6A hypomethylation of thousands of transcripts, including those of ripening and ABA pathway genes.

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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.

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