NDLI: Sugars and Circadian Regulation Make Major Contributions to the Global Regulation of Diurnal Gene Expression in Arabidopsis W⃞ 111111111111111111111111100000000000000000000001100001111000000001000001100010000100000010100001100100000010000010100001101000000001000100010001101000000001000100010001101000000001001111111001101000000001001000001001100100000010001000001001100010000100010000000101100001111000010000000101100000000000000000000001111111111111111111111111

Content Provider	PubMed Central
Author	Bläsing, Oliver E. Gibon, Yves Günther, Manuela Höhne, Melanie Morcuende, Rosa Osuna, Daniel Thimm, Oliver Björn, Usadel Scheible, Wolf-rüdiger Stitt, Mark
Copyright Year	2005
Abstract	The diurnal cycle strongly influences many plant metabolic and physiological processes. Arabidopsis thaliana rosettes were harvested six times during 12-h-light/12-h-dark treatments to investigate changes in gene expression using ATH1 arrays. Diagnostic gene sets were identified from published or in-house expression profiles of the response to light, sugar, nitrogen, and water deficit in seedlings and 4 h of darkness or illumination at ambient or compensation point [CO2]. Many sugar-responsive genes showed large diurnal expression changes, whose timing matched that of the diurnal changes of sugars. A set of circadian-regulated genes also showed large diurnal changes in expression. Comparison of published results from a free-running cycle with the diurnal changes in Columbia-0 (Col-0) and the starchless phosphoglucomutase (pgm) mutant indicated that sugars modify the expression of up to half of the clock-regulated genes. Principle component analysis identified genes that make large contributions to diurnal changes and confirmed that sugar and circadian regulation are the major inputs in Col-0 but that sugars dominate the response in pgm. Most of the changes in pgm are triggered by low sugar levels during the night rather than high levels in the light, highlighting the importance of responses to low sugar in diurnal gene regulation. We identified a set of candidate regulatory genes that show robust responses to alterations in sugar levels and change markedly during the diurnal cycle.
Related Links	http://dx.doi.org/10.1105/tpc.105.035261
Starting Page	3257
File Format	PDF
ISSN	1532298X
e-ISSN	1532298X
Journal	The Plant Cell
Issue Number	12
Volume Number	17
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2005-12-01
Access Restriction	Open
Rights Holder	American Society of Plant Biologists
Subject Keyword	Research in Higher Education
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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