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.

Published in

Nature Cell Biology
2008, Volume: 10, number: 5, pages: 625-628
Publisher: NATURE PUBLISHING GROUP

SLU Authors

• Bhalerao, Rishikesh P.

  • Department of Forest Genetics and Plant Physiology, Swedish University of Agricultural Sciences
    

UKÄ Subject classification

Forest Science


Publication identifier

DOI: https://doi.org/10.1038/ncb1726

Permanent link to this page (URI)

https://res.slu.se/id/publ/18581