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  • Topic: DNA, Gene expression, Epigenetics
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Nutritional Control of Reproductive Status in Honeybees via DNA Methylation R. Kucharski, et al. Science 319, 1827 (2008); DOI: 10.1126/science.1153069 The following resources related to this article are available online at www.sciencemag.org (this information is current as of October 6, 2008 ): Updated information and services, including high-resolution figures, can be found in the online version of this article at: http://www.sciencemag.org/cgi/content/full/319/5871/1827 Downloaded from www.sciencemag.org on October 6, 2008 Supporting Online Material can be found at: http://www.sciencemag.org/cgi/content/full/1153069/DC1 This article cites 25 articles, 5 of which can be accessed for free: http://www.sciencemag.org/cgi/content/full/319/5871/1827#otherarticles This article has been cited by 2 article(s) on the ISI Web of Science. This article appears in the following subject collections: Molecular Biology http://www.sciencemag.org/cgi/collection/molec_biol Information about obtaining reprints of this article or about obtaining permission to reproduce this article in whole or in part can be found at: http://www.sciencemag.org/about/permissions.dtl

Science (print ISSN 0036-8075; online ISSN 1095-9203) is published weekly, except the last week in December, by the American Association for the Advancement of Science, 1200 New York Avenue NW, Washington, DC 20005. Copyright 2008 by the American Association for the Advancement of Science; all rights reserved. The title Science is a registered trademark of AAAS.

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Nutritional Control of Reproductive Status in Honeybees via DNA Methylation R. Kucharski,* J. Maleszka,* S. Foret, R. Maleszka† Fertile queens and sterile workers are alternative forms of the adult female honeybee that develop from genetically identical larvae following differential feeding with royal jelly. We show that silencing the expression of DNA methyltransferase Dnmt3, a key driver of epigenetic global reprogramming, in newly hatched larvae led to a royal jelly–like effect on the larval developmental trajectory; the majority of Dnmt3 small interfering RNA–treated individuals emerged as queens with fully developed ovaries. Our results suggest that DNA methylation in Apis is used for storing epigenetic information, that the use of that information can be differentially altered by nutritional input, and that the flexibility of epigenetic modifications underpins, profound shifts in developmental fates, with massive implications for reproductive and behavioral status. any organisms respond to environmental conditions by displaying phenotypic plasticity, that is, producing different phenotypes from the same DNA genome (1, 2). In social insects, the production of contrasting adult morphologies as well as different repro-

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Molecular Genetics and Evolution, ARC Centre for the Molecular Genetics of Development, Research School of Biological Sciences, Australian National University, Canberra ACT 0200, Australia. *These authors contributed equally to this work. †To whom correspondence should be addressed. E-mail: maleszka@rsbs.anu.edu.au

ductive and behavioral systems is critical to their social organization and division of labor (3–6). These differences are likely to arise at the most basic level from differential somatic imprinting during development on the same genome. Honeybees (Apis mellifera) differentially feed genetically identical female larvae to create mainly workers and, when required, a few queens (7–11). Young nurse bees in the hive produce and feed a largely biochemically uncharacterized substance named royal jelly to larvae destined to become queens, whereas the other larvae are fed with lesssophisticated food (8–11). Despite their identical

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Fig. 1. (A) Injections of Dnmt3 siRNA induce a significant down-regulation of larval Dnmt3 mRNA levels at stage L3....
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