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  Increased Leaf Size: Different Means to an End

Gonzalez, N., de Bodt, S., Sulpice, R., Jikumaru, Y., Chae, E., Dhondt, S., et al. (2010). Increased Leaf Size: Different Means to an End. Plant Physiology, 153(3), 1261-1279. doi:10.1104/pp.110.156018.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2406-3 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0014-2407-1
Genre: Journal Article

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 Creators:
Gonzalez, N.1, Author
de Bodt, S.1, Author
Sulpice, R.2, Author              
Jikumaru, Y.1, Author
Chae, E.1, Author
Dhondt, S.1, Author
van Daele, T.1, Author
de Milde, L.1, Author
Weigel, D.1, Author
Kamiya, Y.1, Author
Stitt, M.2, Author              
Beemster, G. T. S.1, Author
Inze, D.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2System Regulation, Department Stitt, Max Planck Institute of Molecular Plant Physiology, Max Planck Society, ou_1753327              

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Free keywords: arabidopsis-thaliana plant development cell-proliferation organ size synovial sarcoma growth gene expression brassinosteroids pyrophosphorylase
 Abstract: The final size of plant organs, such as leaves, is tightly controlled by environmental and genetic factors that must spatially and temporally coordinate cell expansion and cell cycle activity. However, this regulation of organ growth is still poorly understood. The aim of this study is to gain more insight into the genetic control of leaf size in Arabidopsis (Arabidopsis thaliana) by performing a comparative analysis of transgenic lines that produce enlarged leaves under standardized environmental conditions. To this end, we selected five genes belonging to different functional classes that all positively affect leaf size when overexpressed: AVP1, GRF5, JAW, BRI1, and GA20OX1. We show that the increase in leaf area in these lines depended on leaf position and growth conditions and that all five lines affected leaf size differently; however, in all cases, an increase in cell number was, entirely or predominantly, responsible for the leaf size enlargement. By analyzing hormone levels, transcriptome, and metabolome, we provide deeper insight into the molecular basis of the growth phenotype for the individual lines. A comparative analysis between these data sets indicates that enhanced organ growth is governed by different, seemingly independent pathways. The analysis of transgenic lines simultaneously overexpressing two growth-enhancing genes further supports the concept that multiple pathways independently converge on organ size control in Arabidopsis.

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Language(s): eng - English
 Dates: 2010-05-132010
 Publication Status: Published in print
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 Table of Contents: -
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 Identifiers: ISI: ISI:000279400200030
DOI: 10.1104/pp.110.156018
ISSN: 1532-2548 (Electronic) 0032-0889 (Linking)
URI: ://000279400200030 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2899902/pdf/1261.pdf?tool=pmcentrez
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Title: Plant Physiology
Source Genre: Journal
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Pages: - Volume / Issue: 153 (3) Sequence Number: - Start / End Page: 1261 - 1279 Identifier: -