%0 Journal Article
%9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES
%A Ubeda Tomas, S.
%A Swarup, R.
%A Coates, J.
%A Swarup, K.
%A Laplaze, Laurent
%A Beemster, G. T. S.
%A Hedden, P.
%A Bhalerao, R.
%A Bennett, M. J.
%T Root growth in Arabidopsis requires gibberellin/DELLA signalling in the endodermis
%D 2008
%L PAR00002402
%G ENG
%J Nature Cell Biology
%@ 1465-7392
%M CC:0002555024-0020
%N 5
%P 625-628
%R 10.1038/ncb1726
%U https://www.documentation.ird.fr/hor/PAR00002402
%V 10
%W Horizon (IRD)
%X Gibberellins ( Gas) are key regulators of plant growth and development. they promote growth by targeting the degradation of DELLA repressor proteins; however, their site of action at the cellular, tissue or organ levels remains unknown. to map the site of GA action in regulating root growth, we expressed gai, a non-degradable, mutant DELLA protein, in selected root tissues. root growth was retarded specifically when gai was expressed in endodermal cells. our results demonstrate that the endodermis represents the primary GA-responsive tissue regulating organ growth and that endodermal cell expansion is rate-limiting for elongation of other tissues and therefore of the root as a whole.
%$ 076