Imprinting--a Green Variation

Imprinting is a process by which the paternal allele of a gene is silenced and gene expression occurs only from the maternal allele. Although much is known about imprinting during mammalian development, imprinting during plant development is less well understood. In a Perspective, [Berger][1] discusses new work ([ Kinoshita et al .][2]) that identifies the mechanism for imprinting of the FWA gene in the endosperm of the model plant Arabidopsis. [1]: http://www.sciencemag.org/cgi/content/full/303/5657/483 [2]: http://www.sciencemag.org/cgi/content/short/303/5657/521