Evolution, function, and regulation of genomic imprinting in plant seed development

Genomic imprinting is an epigenetic phenomenon whereby genetically identical alleles are differentially expressed dependent on their parent-of-origin. Genomic imprinting has independently evolved in flowering plants and mammals. In both organism classes, imprinting occurs in embryo-nourishing tissue...

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Bibliographic Details
Published in:Journal of experimental botany 2012-08, Vol.63 (13), p.4713-4722
Main Authors: Jiang, Hua, Köhler, Claudia
Format: Article
Language:English
Subjects:
Alleles
Biological and medical sciences
Biological Evolution
Corn
Developmental Biology
DNA
DNA Methylation
Embryos
Endosperm
Epigenetics
evolution
FLOWERING NEWSLETTER REVIEW
Fundamental and applied biological sciences. Psychology
Gene expression
gene expression regulation
Gene Expression Regulation, Plant
Genes
Genetics
Genetik
Genomic Imprinting
histones
Liliopsida
loci
Magnoliopsida
Magnoliopsida - genetics
Magnoliopsida - growth & development
Magnoliopsida - metabolism
mammals
Methylation
Models, Biological
non-coding RNA
nutrients
placenta
Plant Development
Plant physiology and development
progeny
seed development
Seeds - genetics
Seeds - growth & development
Seeds - metabolism
transposons
Utvecklingsbiologi
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Summary:Genomic imprinting is an epigenetic phenomenon whereby genetically identical alleles are differentially expressed dependent on their parent-of-origin. Genomic imprinting has independently evolved in flowering plants and mammals. In both organism classes, imprinting occurs in embryo-nourishing tissues, the placenta and the endosperm, respectively, and it has been proposed that imprinted genes regulate the transfer of nutrients to the developing progeny. Many imprinted genes are located in the vicinity of DNA-methylated transposon or repeat sequences, implying that transposon insertions are associated with the evolution of imprinted loci. The antagonistic action of DNA methylation and Polycomb group-mediated histone methylation seems important for the regulation of many imprinted plant genes, whereby the position of such epigenetic modifications can determine whether a gene will be mainly expressed from either the maternally or paternally inherited alleles. Furthermore, long non-coding RNAs seem to play an as yet underappreciated role for the regulation of imprinted plant genes. Imprinted expression of a number of genes is conserved between monocots and dicots, suggesting that long-term selection can maintain imprinted expression at some loci.
ISSN:0022-0957
1460-2431
1460-2431
DOI:10.1093/jxb/ers145