Publication
Title
Root growth in **Arabidopsis** requires gibberellin/DELLA signalling in the endodermis
Author
Abstract
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.
Language
English
Source (journal)
Nature cell biology. - London
Publication
London : 2008
ISSN
1465-7392
Volume/pages
10:5(2008), p. 625-628
ISI
000255502400020
Full text (Publisher's DOI)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 21.01.2010
Last edited 14.06.2017