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Low-temperature and circadian signals are integrated by the sigma factor SIG5

Cano-Ramirez, Dora L.; Panter, Paige E.; Takemura, Tokiaki; de Fraine, Tara Saskia; de Barros Dantas, Luíza Lane; Dekeya, Richard; Barros-Galvão, Thiago; Paajanen, Pirita; Bellandi, Annalisa; Batstone, Tom; Manley, Bethan F.; Tanaka, Kan; Imamura, Sousuke; Franklin, Keara A.; Knight, Heather; Dodd, Antony N.

Low-temperature and circadian signals are integrated by the sigma factor SIG5 Thumbnail


Authors

Dora L. Cano-Ramirez

Paige E. Panter

Tokiaki Takemura

Tara Saskia de Fraine

Luíza Lane de Barros Dantas

Richard Dekeya

Thiago Barros-Galvão

Pirita Paajanen

Annalisa Bellandi

Tom Batstone

Bethan F. Manley

Kan Tanaka

Sousuke Imamura

Keara A. Franklin

Antony N. Dodd



Abstract

Chloroplasts are a common feature of plant cells and aspects of their metabolism, including photosynthesis, are influenced by low-temperature conditions. Chloroplasts contain a small circular genome that encodes essential components of the photosynthetic apparatus and chloroplast transcription/translation machinery. Here, we show that in Arabidopsis, a nuclear-encoded sigma factor that controls chloroplast transcription (SIGMA FACTOR5) contributes to adaptation to low-temperature conditions. This process involves the regulation of SIGMA FACTOR5 expression in response to cold by the bZIP transcription factors ELONGATED HYPOCOTYL5 and ELONGATED HYPOCOTYL5 HOMOLOG. The response of this pathway to cold is gated by the circadian clock, and it enhances photosynthetic efficiency during long-term cold and freezing exposure. We identify a process that integrates low-temperature and circadian signals, and modulates the response of chloroplasts to low-temperature conditions.

Citation

Cano-Ramirez, D. L., Panter, P. E., Takemura, T., de Fraine, T. S., de Barros Dantas, L. L., Dekeya, R., …Dodd, A. N. (2023). Low-temperature and circadian signals are integrated by the sigma factor SIG5. Nature Plants, 9(4), 661-672. https://doi.org/10.1038/s41477-023-01377-1

Journal Article Type Article
Acceptance Date Feb 20, 2023
Online Publication Date Mar 30, 2023
Publication Date 2023
Deposit Date Nov 6, 2023
Publicly Available Date Nov 6, 2023
Journal Nature Plants
Print ISSN 2055-026X
Publisher Nature Research
Peer Reviewed Peer Reviewed
Volume 9
Issue 4
Pages 661-672
DOI https://doi.org/10.1038/s41477-023-01377-1
Keywords Plant Science
Public URL https://durham-repository.worktribe.com/output/1898137

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Copyright Statement
This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.





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