Genomic imprinting in plants: the epigenetic version of an Oedipus complex
| Autor: | Wilson Huanca-Mamani, Jean-Philippe Vielle-Calzada, Daphné Autran |
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| Rok vydání: | 2005 |
| Předmět: |
HEREDITE
DEVELOPPEMENT BIOLOGIQUE Genomics Plant Science PLANTE CYCLE DE DEVELOPPEMENT Genome Genomic Imprinting Magnoliopsida Gene Expression Regulation Plant Arabidopsis Epigenetics Allele EMPREINTE PARENTALE Gene Genetics biology food and beverages GENETIQUE biology.organism_classification GENE MODELISATION EXPRESSION DES GENES FECONDATION MAIS REGULATION Genomic imprinting Genome Plant Function (biology) EPIGENESE |
| Zdroj: | Current Opinion in Plant Biology. 8:19-25 |
| ISSN: | 1369-5266 |
| Popis: | Genomic imprinting is a mitotically stable epigenetic modification that results in the functional non-equivalency of both parental genomes following fertilization. In flowering plants, studies of parent-of-origin effects have mostly identified genes that are only transcribed from a maternally inherited allele. In Arabidopsis, the Polycomb group protein MEDEA regulates seed development through the expression of the MADS-box gene PHERES1. Activation of the maternal MEDEA allele requires the function of DEMETER, a plant DNA glycosylase that also controls the transcriptional activity of the maternally inherited allele of the late-flowering gene FWA. Current studies of parent-of-origin effects have mostly identified genes that are only transcribed from a maternally inherited allele. Our current understanding of parent-of-origin effects could represent a new form of an Oedipus complex in which flowering plants prefer to rely transcriptionally on their maternal rather than their paternal chromosomes to ensure normal initiation of seed development. |
| Databáze: | OpenAIRE |
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