Dynamics of imprinted genes and their epigenetic mechanisms in castor bean seed with persistent endosperm

doi:10.1111/nph.19265

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	Dynamics of imprinted genes and their epigenetic mechanisms in castor bean seed with persistent endosperm
	Han,Bing; Li,Yelan; Wu,Di; Li,De-Zhu; Liu,Aizhong; Xu,Wei
	2023
发表期刊	NEW PHYTOLOGIST
ISSN	1469-8137
卷号	240 期号:5 页码:1868-1882
摘要	Genomic imprinting refers to parent-of-origin-dependent gene expression and primarily occurs in the endosperm of flowering plants, but its functions and epigenetic mechanisms remain to be elucidated in eudicots. Castor bean, a eudicot with large and persistent endosperm, provides an excellent system for studying the imprinting.Here, we identified 131 imprinted genes in developing endosperms and endosperm at seed germination phase of castor bean, involving into the endosperm development, accumulation of storage compounds and specially seed germination.Our results showed that the transcriptional repression of maternal allele of DNA METHYLTRANSFERASE 1 (MET1) may be required for maternal genome demethylation in the endosperm. DNA methylation analysis showed that only a small fraction of imprinted genes was associated with allele-specific DNA methylation, and most of them were closely associated with constitutively unmethylated regions (UMRs), suggesting a limited role for DNA methylation in controlling genomic imprinting. Instead, histone modifications can be asymmetrically deposited in maternal and paternal genomes in a DNA methylation-independent manner to control expression of most imprinted genes.These results expanded our understanding of the occurrence and biological functions of imprinted genes and showed the evolutionary flexibility of the imprinting machinery and mechanisms in plants.
关键词	castor bean DNA methylation endosperm epigenetic mechanisms genomic imprinting histone modifications DNA METHYLATION ARABIDOPSIS EXPRESSION EVOLUTION PROTEIN PLANTS CONSERVATION DEMETER PHERES1 COAT
DOI	10.1111/nph.19265
收录类别	SCI
WOS记录号	WOS:001067819600001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75251
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Han,Bing,Li,Yelan,Wu,Di,et al. Dynamics of imprinted genes and their epigenetic mechanisms in castor bean seed with persistent endosperm[J]. NEW PHYTOLOGIST,2023,240(5):1868-1882.
APA	Han,Bing,Li,Yelan,Wu,Di,Li,De-Zhu,Liu,Aizhong,&Xu,Wei.(2023).Dynamics of imprinted genes and their epigenetic mechanisms in castor bean seed with persistent endosperm.NEW PHYTOLOGIST,240(5),1868-1882.
MLA	Han,Bing,et al."Dynamics of imprinted genes and their epigenetic mechanisms in castor bean seed with persistent endosperm".NEW PHYTOLOGIST 240.5(2023):1868-1882.

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