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Science. 2013 Nov 1;342(6158):628-32. doi: 10.1126/science.1241097. Epub 2013 Sep 12.

Regulation of temperature-responsive flowering by MADS-box transcription factor repressors.

Author information

1
Creative Research Initiatives, Department of Life Sciences, Korea University, Seoul 136-701, South Korea.

Abstract

Changes in ambient temperature affect flowering time in plants; understanding this phenomenon will be crucial for buffering agricultural systems from the effects of climate change. Here, we show that levels of FLM-β, an alternatively spliced form of the flowering repressor FLOWERING LOCUS M, increase at lower temperatures, repressing flowering. FLM-β interacts with SHORT VEGETATIVE PHASE (SVP); SVP is degraded at high temperatures, reducing the abundance of the SVP-FLM-β repressor complex and, thus, allowing the plant to flower. The svp and flm mutants show temperature-insensitive flowering in different temperature ranges. Control of SVP-FLM-β repressor complex abundance via transcriptional and splicing regulation of FLM and posttranslational regulation of SVP protein stability provides an efficient, rapid mechanism for plants to respond to ambient temperature changes.

PMID:
24030492
DOI:
10.1126/science.1241097
[Indexed for MEDLINE]
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