alexa One-way control of FWA imprinting in Arabidopsis endosperm by DNA methylation.
Agri and Aquaculture

Agri and Aquaculture

Rice Research: Open Access

Author(s): Kinoshita T, Miura A, Choi Y, Kinoshita Y, Cao X, , Kinoshita T, Miura A, Choi Y, Kinoshita Y, Cao X,

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Abstract The Arabidopsis FWA gene was initially identified from late-flowering epigenetic mutants that show ectopic FWA expression associated with heritable hypomethylation of repeats around transcription starting sites. Here, we show that wild-type FWA displays imprinted (maternal origin-specific) expression in endosperm. The FWA imprint depends on the maintenance DNA methyltransferase MET1, as is the case in mammals. Unlike mammals, however, the FWA imprint is not established by allele-specific de novo methylation. It is established by maternal gametophyte-specific gene activation, which depends on a DNA glycosylase gene, DEMETER. Because endosperm does not contribute to the next generation, the activated FWA gene need not be silenced again. Double fertilization enables plants to use such "one-way" control of imprinting and DNA methylation in endosperm. This article was published in Science and referenced in Rice Research: Open Access

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