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Media type:
E-Article
Title:
An upstream regulator of the 26S proteasome modulates organ size in Arabidopsis thaliana
Contributor:
Nguyen, Hung M.;
Schippers, Jos H. M.;
Gõni‐Ramos, Oscar;
Christoph, Mathias P.;
Dortay, Hakan;
van der Hoorn, Renier A. L.;
Mueller‐Roeber, Bernd
Published:
Wiley, 2013
Published in:
The Plant Journal, 74 (2013) 1, Seite 25-36
Language:
English
DOI:
10.1111/tpj.12097
ISSN:
0960-7412;
1365-313X
Origination:
Footnote:
Description:
SummaryIn both animal and plant kingdoms, body size is a fundamental but still poorly understood attribute of biological systems. Here we report that the Arabidopsis NAC transcription factor ‘Regulator of Proteasomal Gene Expression’ (RPX) controls leaf size by positively modulating proteasome activity. We further show that the cis‐element recognized by RPX is evolutionarily conserved between higher plant species. Upon over‐expression of RPX, plants exhibit reduced growth, which may be reversed by a low concentration of the pharmacological proteasome inhibitor MG132. These data suggest that the rate of protein turnover during growth is a critical parameter for determining final organ size.