Endosperm gene imprinting and seed development
نویسندگان
چکیده
منابع مشابه
Imprinting and seed development.
Imprinted genes are expressed predominantly from one allele in a parent-of-origin–specific manner. The endosperm, a seed tissue that mediates the transfer of nutrients from the maternal parent to the embryo, is an important site of imprinting in flowering plants. Imprinted genes have been identified in maize and Arabidopsis thaliana, but crosses in a variety of species suggest that the effect o...
متن کاملImprinting During Seed Development Underlies Gene Extensive Demethylation of Repetitive
www.sciencemag.org (this information is current as of June 11, 2009 ): The following resources related to this article are available online at http://www.sciencemag.org/cgi/content/full/324/5933/1447 version of this article at: including high-resolution figures, can be found in the online Updated information and services, http://www.sciencemag.org/cgi/content/full/324/5933/1447/DC1 can be found...
متن کاملImprinting of the MEDEA polycomb gene in the Arabidopsis endosperm.
In flowering plants, two cells are fertilized in the haploid female gametophyte. Egg and sperm nuclei fuse to form the embryo. A second sperm nucleus fuses with the central cell nucleus that replicates to generate the endosperm, which is a tissue that supports embryo development. MEDEA (MEA) encodes an Arabidopsis SET domain Polycomb protein. Inheritance of a maternal loss-of-function mea allel...
متن کاملDEMETER, a DNA Glycosylase Domain Protein, Is Required for Endosperm Gene Imprinting and Seed Viability in Arabidopsis
We isolated mutations in Arabidopsis to understand how the female gametophyte controls embryo and endosperm development. For the DEMETER (DME) gene, seed viability depends only on the maternal allele. DME encodes a large protein with DNA glycosylase and nuclear localization domains. DME is expressed primarily in the central cell of the female gametophyte, the progenitor of the endosperm. DME is...
متن کاملGenome demethylation and imprinting in the endosperm.
Imprinting occurs in the endosperm of flowering plants. The endosperm, a product of central cell fertilization, is critical for embryo and seed development. Imprinting in the endosperm is mainly due to the inherited differences in gamete epigenetic composition. Studies have also shown that there are differences in genomic DNA methylation patterns between embryo and endosperm. Examining those di...
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ژورنال
عنوان ژورنال: Current Opinion in Genetics & Development
سال: 2007
ISSN: 0959-437X
DOI: 10.1016/j.gde.2007.08.011