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  Circadian Control of Metabolism by the Clock Component TOC1

Cervela-Cardona, L., Yoshida, T., Zhang, Y., Okada, M., Fernie, A. R., & Mas, P. (2021). Circadian Control of Metabolism by the Clock Component TOC1. Frontiers in Plant Science, 12: 683516. doi:10.3389/fpls.2021.683516.

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Cervela-Cardona, Luis1, Author
Yoshida, T.2, Author              
Zhang, YJ2, Author              
Okada, Masaaki1, Author
Fernie, A. R.2, Author              
Mas, Paloma1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              

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 Abstract: Photosynthesis in chloroplasts during the day and mitochondrial respiration during the night execute nearly opposing reactions that are coordinated with the internal cellular status and the external conditions. Here, we describe a mechanism by which the Arabidopsis clock component TIMING OF CAB EXPRESSION1 (TOC1) contributes to the diurnal regulation of metabolism. Proper expression of TOC1 is important for sustaining cellular energy and for the diel and circadian oscillations of sugars, amino acids and tricarboxylic acid (TCA) cycle intermediates. TOC1 binds to the promoter of the TCA-related gene FUMARASE 2 to repress its expression at night, which results in decreased fumarate accumulation in TOC1 over-expressing plants and increased in toc1-2 mutant. Genetic interaction studies confirmed that over-expression of FUMARASE 2 in TOC1 over-expressing plants alleviates the molecular and physiological energy-deprivation phenotypes of TOC1 over-expressing plants. Thus, we propose that the tandem TOC1-FUMARASE 2 is one of the mechanisms that contribute to the regulation of plant metabolism during the day and night.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published in print
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 Rev. Type: -
 Identifiers: DOI: 10.3389/fpls.2021.683516
BibTex Citekey: 10.3389/fpls.2021.683516
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Title: Frontiers in Plant Science
  Abbreviation : Front. Plant Sci.
Source Genre: Journal
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Publ. Info: Lausanne : Frontiers Media
Pages: - Volume / Issue: 12 Sequence Number: 683516 Start / End Page: - Identifier: ISSN: 1664-462X
CoNE: https://pure.mpg.de/cone/journals/resource/1664462X