Regulation of Temperature-Responsive Flowering by MADS-Box Transcription Factor Repressors

• DOI: 10.1126/science.1241097
• Publication Date: 2013-09-13T03:59:25Z
• Authors: Jeong Hwan Lee; Hak-Seung Ryu; Kyung Sook Chung; David Posé; Soonkap Kim; Markus Schmid; Ji Hoon Ahn
• Keywords: MADS-box; Flowering Locus C; Transcription

Chilly Repression Stalls Flowering In a cool spring, flowering might be delayed compared to warm even though the change in day length marches on regardless of temperature. Lee et al. (p. 628 , published online 12 September; see Perspective by Nilsson ) now show that this delay is regulated process, not simply consequence sluggish metabolism. model plant Arabidopsis transcription gene encoding regulator SHORT VEGETATIVE PHASE (SVP) unaffected temperature, but stability SVP protein decreased at higher temperatures. Its regulatory partner, FLOWERING LOCUS M ( FLM )- β product alternative splicing transcripts from favors form lower and FLM-β complex represses flowering. At temperatures, more repressive present delayed. tends degrade produced, yielding reduced levels complex, which allows proceed.