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Science 339 (6120): 704-707

Copyright © 2013 by the American Association for the Advancement of Science

Regulation of Flowering by Trehalose-6-Phosphate Signaling in Arabidopsis thaliana

Vanessa Wahl,1,* Jathish Ponnu,2 Armin Schlereth,1 Stéphanie Arrivault,1 Tobias Langenecker,2 Annika Franke,1 Regina Feil,1 John E. Lunn,1 Mark Stitt,1 Markus Schmid2,*

Abstract: The timing of the induction of flowering determines to a large extent the reproductive success of plants. Plants integrate diverse environmental and endogenous signals to ensure the timely transition from vegetative growth to flowering. Carbohydrates are thought to play a crucial role in the regulation of flowering, and trehalose-6-phosphate (T6P) has been suggested to function as a proxy for carbohydrate status in plants. The loss of TREHALOSE-6-PHOSPHATE SYNTHASE 1 (TPS1) causes Arabidopsis thaliana to flower extremely late, even under otherwise inductive environmental conditions. This suggests that TPS1 is required for the timely initiation of flowering. We show that the T6P pathway affects flowering both in the leaves and at the shoot meristem, and integrate TPS1 into the existing genetic framework of flowering-time control.

1 Department of Metabolic Networks, Max Planck Institute of Molecular Plant Physiology, Am Mühlenberg 1, 14476 Potsdam, Germany.
2 Department of Molecular Biology, Max Planck Institute for Developmental Biology, Spemannstr. 35, 72076 Tübingen, Germany.

* To whom correspondence should be addressed. E-mail: vanessa.wahl{at}mpimp-golm.mpg.de (V.W.); maschmid{at}tuebingen.mpg.de (M.S.)

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