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Science 6 January 2006:
Vol. 311. no. 5757, pp. 91 - 94
DOI: 10.1126/science.1118642

Reports

Integration of Plant Responses to Environmentally Activated Phytohormonal Signals

Patrick Achard,1 Hui Cheng,2* Liesbeth De Grauwe,3* Jan Decat,3 Hermien Schoutteten,3 Thomas Moritz,4 Dominique Van Der Straeten,3{dagger} Jinrong Peng,2{dagger} Nicholas P. Harberd1{dagger}

Plants live in fixed locations and survive adversity by integrating growth responses to diverse environmental signals. Here, we show that the nuclear-localized growth-repressing DELLA proteins of Arabidopsis integrate responses to independent hormonal and environmental signals of adverse conditions. The growth restraint conferred by DELLA proteins is beneficial and promotes survival. We propose that DELLAs permit flexible and appropriate modulation of plant growth in response to changes in natural environments.

1 John Innes Centre, Norwich NR4 7UJ, UK.
2 Institute of Molecular and Cell Biology, 61 Biopolis Drive, Proteos 138673, Singapore.
3 Unit Plant Hormone Signaling and Bio-Imaging, Department of Molecular Genetics, Ghent University, Ledeganckstraat 35, B-9000 Gent, Belgium.
4 Umeå Plant Science Center, Department of Forest and Plant Physiology, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden.

* These authors contributed equally to this work.

{dagger} To whom correspondence should be addressed. E-mail: dominique.vanderstraeten{at}ugent.be (D.V.D.S.); pengjr{at}imcb.a-star.edu.sg (J.P.); nicholas.harberd{at}bbsrc.ac.uk (N.P.H.)

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