Absence of warmth permits epigenetic memory of winter in Arabidopsis

Forskningsoutput: TidskriftsbidragArtikel i vetenskaplig tidskrift

Abstract

Plants integrate widely fluctuating temperatures to monitor seasonal progression. Here, we investigate the temperature signals in field conditions that result in vernalisation, the mechanism by which flowering is aligned with spring. We find that multiple, distinct aspects of the temperature profile contribute to vernalisation. In autumn, transient cold temperatures promote transcriptional shutdown of Arabidopsis FLOWERING LOCUS C (FLC), independently of factors conferring epigenetic memory. As winter continues, expression of VERNALIZATION INSENSITIVE3 (VIN3), a factor needed for epigenetic silencing, is upregulated by at least two independent thermosensory processes. One integrates long-term cold temperatures, while the other requires the absence of daily temperatures above 15 °C. The lack of spikes of high temperature, not just prolonged cold, is thus the major driver for vernalisation. Monitoring of peak daily temperature is an effective mechanism to judge seasonal progression, but is likely to have deleterious consequences for vernalisation as the climate becomes more variable.

Detaljer

Författare
  • Jo Hepworth
  • Rea L. Antoniou-Kourounioti
  • Rebecca H. Bloomer
  • Catja Selga
  • Kristina Berggren
  • Deborah Cox
  • Barley R. Collier Harris
  • Judith A. Irwin
  • Svante Holm
  • Torbjörn Säll
  • Martin Howard
  • Caroline Dean
Enheter & grupper
Externa organisationer
  • John Innes Centre
  • Mittuniversitetet
  • Lund University
Forskningsområden

Ämnesklassifikation (UKÄ) – OBLIGATORISK

  • Botanik
  • Genetik
Originalspråkengelska
Artikelnummer639
TidskriftNature Communications
Volym9
Utgivningsnummer1
StatusPublished - 2018 dec 1
PublikationskategoriForskning
Peer review utfördJa