Role of SVP in the control of flowering time by ambient temperature in Arabidopsis
- Jeong Hwan Lee1,4,
- Seong Jeon Yoo1,4,
- Soo Hyun Park1,
- Ildoo Hwang2,
- Jong Seob Lee3, and
- Ji Hoon Ahn1,5
- 1 Plant Signaling Network Research Center, School of Life Sciences and Biotechnology, Korea University, Seoul, 136-701, Korea;
- 2 Division of Molecular and Life Sciences, Pohang University of Science and Technology, Pohang 790-784, Korea;
- 3 School of Biological Sciences, Seoul National University, Seoul, 151-742, Korea
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↵4 These authors contributed equally to this work.
Abstract
Plants must perceive and rapidly respond to changes in ambient temperature for their successful reproduction. Here we demonstrate that Arabidopsis SHORT VEGETATIVE PHASE (SVP) plays an important role in the response of plants to ambient temperature changes. The loss of SVP function elicited insensitivity to ambient temperature changes. SVP mediates the temperature-dependent functions of FCA and FVE within the thermosensory pathway. SVP controls flowering time by negatively regulating the expression of a floral integrator, FLOWERING LOCUS T (FT), via direct binding to the CArG motifs in the FT sequence. We propose that this is one of the molecular mechanisms that modulate flowering time under fluctuating temperature conditions.
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Footnotes
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↵5 Corresponding author.
↵5 E-MAIL jahn{at}korea.ac.kr; FAX 82-2-927-9028.
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Supplemental material is available at http://www.genesdev.org.
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Article is online at http://www.genesdev.org/cgi/doi/10.1101/gad.1518407
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- Received November 28, 2006.
- Accepted January 2, 2007.
- Copyright © 2007, Cold Spring Harbor Laboratory Press
