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Targeted suppression of siRNA biogenesis in Arabidopsis pollen [bisulfite-seq]

ABSTRACT: Targeted suppression of siRNA biogenesis in Arabidopsis pollen [bisulfite-seq]

PROVIDER: PRJNA967286 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR24436004_1.fastq.gz	Fastqsanger.gz
	SRR24436004_2.fastq.gz	Fastqsanger.gz
	SRR24436005_1.fastq.gz	Fastqsanger.gz
	SRR24436005_2.fastq.gz	Fastqsanger.gz
	SRR24436006_1.fastq.gz	Fastqsanger.gz

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Targeted suppression of siRNA biogenesis in Arabidopsis pollen [bisulfite-seq]

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Project description:Targeted suppression of siRNA biogenesis in Arabidopsis pollen [small RNA-seq]

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Targeted suppression of siRNA biogenesis in Arabidopsis pollen

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

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Target-dependent siRNA suppression distinguishes self from non-self endogenous siRNAs in C. elegans germline

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Tricellular pollen and pollen mother cells (11447)

Project description:We isolated tricellular pollen (TCP) and pollen mother cells (PMC) of rice using laser microdissection, and did microarray analysis with Agilent 44k rice array.

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Project description:The mutagenic activity of transposable elements (TEs) is suppressed by epigenetic silencing and small interfering RNAs (siRNAs), especially in gametes that would transmit transposed elements to the next generation. In pollen from the model plant Arabidopsis, we show that TEs are unexpectedly reactivated and transpose, but only in the pollen vegetative nucleus, which accompanies the sperm cells but does not provide DNA to the fertilized zygote. TE expression coincides with down-regulation of the heterochromatin remodeler DECREASE IN DNA METHYLATION 1 and of most TE siRNAs. However, 21 nucleotide siRNA from Athila retrotransposons is generated in pollen and accumulates in sperm, indicating that siRNA from TEs activated in the vegetative nucleus can target silencing in gametes. We propose a conserved role for reprogramming in germline companion cells, such as nurse cells in insects and vegetative nuclei in plants, to reveal intact TEs in the genome and regulate their activity in gametes.

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