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  Global transcript levels respond to small changes of the carbon status during progressive exhaustion of carbohydrates in Arabidopsis rosettes

Usadel, B., Blaesing, O. E., Gibon, Y., Retzlaff, K., Hoehne, M., Guenther, M., et al. (2008). Global transcript levels respond to small changes of the carbon status during progressive exhaustion of carbohydrates in Arabidopsis rosettes. Plant Physiology, 146(4), 1834-1861. doi:10.1104/pp.107.115592.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2670-1 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2671-0
Genre: Journal Article

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 Creators:
Usadel, B.1, 2, Author              
Blaesing, O. E.3, Author
Gibon, Y.2, Author              
Retzlaff, K.3, Author
Hoehne, M.2, Author              
Guenther, M.2, Author              
Stitt, M.2, Author              
Affiliations:
1Integrative Carbon Biology, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753329              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              
3External Organizations, ou_persistent22              

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Free keywords: adp-glucose pyrophosphorylase photosynthetic period duration posttranslational redox-modification trehalose 6-phosphate enzyme-activities starch synthesis circadian clock gene-expression diurnal changes adpglucose pyrophosphorylase
 Abstract: The balance between the supply and utilization of carbon (C) changes continually. It has been proposed that plants respond in an acclimatory manner, modifying C utilization to minimize harmful periods of C depletion. This hypothesis predicts that signaling events are initiated by small changes in C status. We analyzed the global transcriptional response to a gradual depletion of C during the night and an extension of the night, where C becomes severely limiting from 4 h onward. The response was interpreted using published datasets for sugar, light, and circadian responses. Hundreds of C-responsive genes respond during the night and others very early in the extended night. Pathway analysis reveals that biosynthesis and cellular growth genes are repressed during the night and genes involved in catabolism are induced during the first hours of the extended night. The C response is amplified by an antagonistic interaction with the clock. Light signaling is attenuated during the 24-h light/dark cycle. A model was developed that uses the response of 22K genes during a circadian cycle and their responses to C and light to predict global transcriptional responses during diurnal cycles of wild-type and starchless pgm mutant plants and an extended night in wild-type plants. By identifying sets of genes that respond at different speeds and times during C depletion, our extended dataset and model aid the analysis of candidates for C signaling. This is illustrated for AKIN10 and four bZIP transcription factors, and sets of genes involved in trehalose signaling, protein turnover, and starch breakdown.

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Language(s): eng - English
 Dates: 2008-02-292008
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: ISI: ISI:000256417900030
DOI: 10.1104/pp.107.115592
ISSN: 0032-0889 (Print) 0032-0889 (Linking)
URI: ://000256417900030 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2287354/pdf/pp1461834.pdf?tool=pmcentrez
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Title: Plant Physiology
Source Genre: Journal
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Pages: - Volume / Issue: 146 (4) Sequence Number: - Start / End Page: 1834 - 1861 Identifier: -