Absence of warmth permits epigenetic memory of winter in Arabidopsis
Open Access
- 12 February 2018
- journal article
- research article
- Published by Springer Science and Business Media LLC in Nature Communications
- Vol. 9 (1), 1-8
- https://doi.org/10.1038/s41467-018-03065-7
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.Keywords
This publication has 48 references indexed in Scilit:
- Seasonal shift in timing of vernalization as an adaptation to extreme wintereLife, 2015
- Natural variation in the temperature range permissive for vernalization in accessions of Arabidopsis thalianaPlant, Cell & Environment, 2012
- Robust control of the seasonal expression of the Arabidopsis FLC gene in a fluctuating environmentProceedings of the National Academy of Sciences of the United States of America, 2010
- Effects of Genetic Perturbation on Seasonal Life History PlasticityScience, 2009
- A PHD-Polycomb Repressive Complex 2 triggers the epigenetic silencing of FLC during vernalizationProceedings of the National Academy of Sciences of the United States of America, 2008
- Resetting of FLOWERING LOCUS C expression after epigenetic repression by vernalizationProceedings of the National Academy of Sciences of the United States of America, 2008
- Vernalization requires epigenetic silencing of FLC by histone methylationNature, 2004
- Vernalization in Arabidopsis thaliana is mediated by the PHD finger protein VIN3Nature, 2004
- The VERNALIZATION 2 Gene Mediates the Epigenetic Regulation of Vernalization in ArabidopsisCell, 2001
- Untersuchungen über das Vernalisationsverhalten einer winterannuellen Rasse von Arabidopsis thalianaPlanta, 1957