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Integration of Plant Responses to Environmentally Activated Phytohormonal Signals
Patrick Achard,1Hui Cheng,2*Liesbeth De Grauwe,3*Jan Decat,3Hermien Schoutteten,3Thomas Moritz,4Dominique Van Der Straeten,3Jinrong Peng,2Nicholas P. Harberd1
Plants live in fixed locations and survive adversity by integratinggrowth responses to diverse environmental signals. Here, weshow that the nuclear-localized growth-repressing DELLA proteinsof Arabidopsis integrate responses to independent hormonal andenvironmental signals of adverse conditions. The growth restraintconferred by DELLA proteins is beneficial and promotes survival.We propose that DELLAs permit flexible and appropriate modulationof 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.
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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