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  Translatome and metabolome effects triggered by gibberellins during rosette growth in Arabidopsis

Ribeiro, D. M., Araujo, W. L., Fernie, A. R., Schippers, J. H., & Mueller-Roeber, B. (2012). Translatome and metabolome effects triggered by gibberellins during rosette growth in Arabidopsis. Journal of Experimental Botany, 63(7), 2769-2786. doi:10.1093/jxb/err463.

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Ribeiro, D. M.1, Author           
Araujo, W. L.2, Author           
Fernie, A. R.2, Author           
Schippers, J. H.1, Author           
Mueller-Roeber, B.3, Author           
Affiliations:
1Transcription Factors and Gene Regulatory Networks, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753316              
2Central Metabolism, Department Willmitzer, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753339              
3Plant Signalling, Cooperative Research Groups, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753311              

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 Abstract: Although gibberellins (GAs) are well known for their growth control function, little is known about their effects on primary metabolism. Here the modulation of gene expression and metabolic adjustment in response to changes in plant (Arabidopsis thaliana) growth imposed on varying the gibberellin regime were evaluated. Polysomal mRNA populations were profiled following treatment of plants with paclobutrazol (PAC), an inhibitor of GA biosynthesis, and gibberellic acid (GA(3)) to monitor translational regulation of mRNAs globally. Gibberellin levels did not affect levels of carbohydrates in plants treated with PAC and/or GA(3). However, the tricarboxylic acid cycle intermediates malate and fumarate, two alternative carbon storage molecules, accumulated upon PAC treatment. Moreover, an increase in nitrate and in the levels of the amino acids was observed in plants grown under a low GA regime. Only minor changes in amino acid levels were detected in plants treated with GA(3) alone, or PAC plus GA(3). Comparison of the molecular changes at the transcript and metabolite levels demonstrated that a low GA level mainly affects growth by uncoupling growth from carbon availability. These observations, together with the translatome changes, reveal an interaction between energy metabolism and GA-mediated control of growth to coordinate cell wall extension, secondary metabolism, and lipid metabolism.

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Language(s): eng - English
 Dates: 2012-02-012012
 Publication Status: Issued
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Title: Journal of Experimental Botany
  Other : J. Exp. Bot
Source Genre: Journal
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Publ. Info: Oxford : Oxford University Press [etc.]
Pages: - Volume / Issue: 63 (7) Sequence Number: - Start / End Page: 2769 - 2786 Identifier: ISSN: 0022-0957
CoNE: https://pure.mpg.de/cone/journals/resource/954925413883