Regulation of Ambient Temperature-Responsive Flowering by MADS-Box Transcription Factor Repressor Complexes.

  • Lee J
  • Ryu H
  • Chung K
 et al. 
  • 18

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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 post-translational regulation of SVP protein stability provides an efficient, rapid mechanism for plants to respond to ambient temperature changes.

Author-supplied keywords

  • Alternative Splicing
  • Arabidopsis
  • Arabidopsis Proteins
  • Arabidopsis Proteins: genetics
  • Arabidopsis Proteins: metabolism
  • Arabidopsis: genetics
  • Arabidopsis: growth & development
  • Arabidopsis: metabolism
  • Flowers
  • Flowers: genetics
  • Flowers: growth & development
  • Flowers: metabolism
  • Gene Expression Regulation
  • MADS Domain Proteins
  • MADS Domain Proteins: genetics
  • MADS Domain Proteins: metabolism
  • Molecular Sequence Data
  • Mutation
  • Plant
  • Repressor Proteins
  • Repressor Proteins: genetics
  • Repressor Proteins: metabolism
  • Temperature
  • Transcription Factors
  • Transcription Factors: genetics
  • Transcription Factors: metabolism

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Authors

  • Jeong Hwan Lee

  • Hak-Seung Ryu

  • Kyung Sook Chung

  • David Pose

  • Soonkap Kim

  • Markus Schmid

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