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Temperature Sensing Is Distributed throughout the Regulatory Network that Controls FLC Epigenetic Silencing in Vernalization
Norwich Research Park, Norwich, United Kingdom.
Norwich Research Park, Norwich, United Kingdom.
Norwich Research Park, Norwich, United Kingdom.
Norwich Research Park, Norwich, United Kingdom.
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2018 (English)In: Cell systems, ISSN 2405-4712, Vol. 7, no 6, p. 643-655Article in journal (Refereed) Published
Abstract [en]

Many organisms need to respond to complex, noisy environmental signals for developmental decision making. Here, we dissect how Arabidopsis plants integrate widely fluctuating field temperatures over month-long timescales to progressively upregulate VERNALIZATION INSENSITIVE3 (VIN3) and silence FLOWERING LOCUS C (FLC), aligning flowering with spring. We develop a mathematical model for vernalization that operates on multiple timescales-long term (month), short term (day), and current (hour)-and is constrained by experimental data. Our analysis demonstrates that temperature sensing is not localized to specific nodes within the FLC network. Instead, temperature sensing is broadly distributed, with each thermosensory process responding to specific features of the plants' history of exposure to warm and cold. The model accurately predicts FLC silencing in new field data, allowing us to forecast FLC expression in changing climates. We suggest that distributed thermosensing may be a general property of thermoresponsive regulatory networks in complex natural environments. 

Place, publisher, year, edition, pages
2018. Vol. 7, no 6, p. 643-655
Keywords [en]
climate change, epigenetics, FLC, FLOWERING LOCUS C, gene regulation, mathematical modeling, phenology, temperature sensing, vernalization, VERNALIZATION INSENSITIVE3, VIN3
National Category
Biological Sciences
Identifiers
URN: urn:nbn:se:miun:diva-35416DOI: 10.1016/j.cels.2018.10.011ISI: 000454344300008PubMedID: 30503646Scopus ID: 2-s2.0-85059223084OAI: oai:DiVA.org:miun-35416DiVA, id: diva2:1276995
Available from: 2019-01-09 Created: 2019-01-09 Last updated: 2019-01-10Bibliographically approved

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Holm, Svante

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