title: How to fine-tune an epigenetic switch.
abstract: Arabidopsis does not flower in winter because FLC represses flowering genes, but prolonged cold exposure silences FLC, allowing flowering in spring. How do plants recalibrate this switch to adapt to different climates? Reporting in Science, Coustham et al. (2012) found that tweaking a Polycomb target sequence may do the trick.
authors.affiliation: Institute of Plant Biology and Zürich-Basel Plant Science Center, University of Zürich, CH-8008 Zürich, Switzerland. nuno.pires@botinst.uzh.ch
authors.forename: Nuno D
authors.initials: ND
authors.lastname: Pires
authors.forename: Ueli
authors.initials: U
authors.lastname: Grossniklaus