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Brief Communication

Nature Cell Biology 10, 625–628 (1 May 2008) | doi:10.1038/ncb1726

Root growth in Arabidopsis requires gibberellin/DELLA signalling in the endodermis

Susana Ubeda-Tom|[aacute]|s , Ranjan Swarup , Juliet Coates , Kamal Swarup , Laurent Laplaze , Gerrit T.S. Beemster , Peter Hedden , Rishikesh Bhalerao & Malcolm J. Bennett

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.