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SPLAYED, a Novel SWI/SNF ATPase Homolog, Controls Reproductive Development in Arabidopsis

Wagner, Doris and Meyerowitz, Elliot M. (2002) SPLAYED, a Novel SWI/SNF ATPase Homolog, Controls Reproductive Development in Arabidopsis. Current Biology, 12 (2). pp. 85-94. ISSN 0960-9822. doi:10.1016/S0960-9822(01)00651-0.

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Background: The plant-specific transcriptional activator LEAFY (LFY) is a central regulator of the transition to reproductive development in Arabidopsis. LFY has a second, later role in the induction of floral homeotic gene expression. Available data suggests that, while LFY activity is controlled via interaction with tissue-specific coactivators, other mechanisms exist that regulate LFY activity, the identity of which are not known. Results: We have identified a novel component in the temporal control of the switch from vegetative to reproductive development in Arabidopsis thaliana. The SPLAYED (SYD) gene product acts with LFY to regulate shoot apical meristem identity. SYD is also involved in the regulation of floral homeotic gene expression. In addition, mutations in SYD cause LFY-independent phenotypes that indicate that SYD is necessary for meristem maintenance during reproductive development and that SYD is required for proper carpel and ovule development. SYD encodes a presumptive Arabidopsis homolog of the yeast Snf2p ATPase, which is implicated in transcriptional control via chromatin remodeling. Conclusions: SYD acts as a LFY-dependent repressor of the meristem identity switch in the floral transition, most likely by altering the activity of the LFY transcription factor. That SYD regulates flowering in response to environmental stimuli suggests that the effect of environmental cues on plant development may be achieved in part by regulating transcription factor activity via alteration of the chromatin state.

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Meyerowitz, Elliot M.0000-0003-4798-5153
Additional Information:© 2002 Cell Press. Received: October 12, 2001. Revised: November 15, 2001. Accepted: November 15. Published: January 22, 2002. We thank Jae Hur, Vijaya Rao, Lili Blum, and Cristal Gama for their research assistance at various stages of this project. We are grateful for the sequencing information provided by TIGR as well as for the BAC libraries and BAC clones provided by the ABRC (Ohio stock center). We thank J.L. Bowman and Y. Eshed for the gift of syd-3 and syd-4. We thank them and C.F. Chuang, J. Fletcher, T. Ito, J. Long, C. Ohno, J.L. Riechmann, G. Venugopala Reddy, M. Vishnevetsky, J.D. Wagner, and E. Ziegelhoffer for critical reading and comments on the manuscript. This work was supported by the Helen Hay Whitney Foundation (D.W.) and U.S. Department of Energy grant FG03-88ER13873 (E.M.M.).
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Helen Hay Whitney FoundationUNSPECIFIED
Department of Energy (DOE)FG03-88ER13873
Issue or Number:2
Record Number:CaltechAUTHORS:20161201-124619721
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Official Citation:Doris Wagner, Elliot M. Meyerowitz, SPLAYED, a Novel SWI/SNF ATPase Homolog, Controls Reproductive Development in Arabidopsis, Current Biology, Volume 12, Issue 2, 22 January 2002, Pages 85-94, ISSN 0960-9822, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72497
Deposited By: Ruth Sustaita
Deposited On:02 Dec 2016 02:27
Last Modified:11 Nov 2021 05:02

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