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Science 299 (5614): 1853-1854

Copyright © 2003 by the American Association for the Advancement of Science

BOTANY:
Relieving DELLA Restraint

Nicholas P. Harberd

Phytohormones such as gibberellins are known to promote plant growth, but it is unclear how they do this. In a Perspective, Harberd discusses new work (Sasaki et al.) that reveals the biochemical basis of the relief-of-restraint model of plant growth regulation. A gibberellin signal promotes proteasomal degradation of DELLA proteins, which normally restrain plant growth.


The author is at the John Innes Centre, Norwich, Norfolk NR4 7UH, UK. E-mail: nicholas.harberd{at}bbsrc.ac.uk


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