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Sci. Signal., 9 April 2013
Vol. 6, Issue 270, p. ra23
[DOI: 10.1126/scisignal.2003937]

RESEARCH ARTICLES

LEAFY Controls Auxin Response Pathways in Floral Primordium Formation

Wuxing Li1, Yun Zhou1, Xing Liu2*, Peng Yu2, Jerry D. Cohen2, and Elliot M. Meyerowitz1,3{dagger}

1 Howard Hughes Medical Institute and Division of Biology, MC 156-29, California Institute of Technology, Pasadena, CA 91007, USA.
2 Department of Horticultural Science and Microbial and Plant Genomics Institute, University of Minnesota, Saint Paul, MN 55108, USA.
3 Sainsbury Laboratory, Cambridge University, Bateman Street, Cambridge CB2 1LR, UK.

* Present address: Division of Biology, MC 156-29, California Institute of Technology, Pasadena, CA 91007, USA.

Abstract: The transcription factor LEAFY is a master regulator of flowering and of flower development. It acts as a component of a switch that mediates the transition from the vegetative to the reproductive phase of plant development. Auxin is a plant hormone with many different roles in plant growth, including the induction of new primordia of both leaves and flowers at the shoot apex. We report that LEAFY acts in part by controlling the auxin response pathway in new primordia. Therefore, regulation of flower development by transcriptional master regulators and hormonal control of morphogenesis appear to be interacting processes. We found that hormone perception not only controls but is also controlled by the transcriptional signals that create plant form.

{dagger} Corresponding author. E-mail: meyerow{at}caltech.edu

Citation: W. Li, Y. Zhou, X. Liu, P. Yu, J. D. Cohen, E. M. Meyerowitz, LEAFY Controls Auxin Response Pathways in Floral Primordium Formation. Sci. Signal. 6, ra23 (2013).

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