title: Molecular interactions between light and hormone signaling to control plant growth.
abstract: As sessile organisms, plants modulate their growth rate and development according to the continuous variation in the conditions of their surrounding environment, an ability referred to as plasticity. This ability relies on a web of interactions between signaling pathways triggered by endogenous and environmental cues. How changes in environmental factors are interpreted by the plant in terms of developmental or growth cues or, in other words, how they contribute to plant plasticity is a current, major question in plant biology. Light stands out among the environmental factors that shape plant development. Plants have evolved systems that allow them to monitor both quantitative and qualitative differences in the light that they perceive, that render important changes in their growth habit. In this review we focus on recent findings about how information from this environmental cue is integrated during de-etiolation and in the shade-avoidance syndrome, and modulated by several hormone pathways-the endogenous cues. In some cases the interaction between a hormone and the light signaling pathways is reciprocal, as is the case of the gibberellin pathway, whereas in other cases hormone pathways act downstream of the environmental cue to regulate growth. Moreover, the circadian clock adds an additional layer of regulation, which has been proposed to integrate the information provided by light with that provided by hormone pathways, to regulate daily growth.
authors.affiliation: Instituto de Biología Molecular y Celular de Plantas (UPV-CSIC), Universidad Politécnica de Valencia, Avda de los Naranjos s/n, 46022 Valencia, Spain.
authors.forename: David
authors.initials: D
authors.lastname: Alabadí
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Blázquez
mesh_terms: D001362:Avoidance Learning; D002940:Circadian Rhythm; D005875:Gibberellins / Q000235:genetics / Q000502:physiology / Q000528:radiation effects; D008027:Light; D009024:Morphogenesis / Q000528:radiation effects; D063245:Plant Development; D010937:Plant Growth Regulators / Q000235:genetics / Q000502:physiology* / Q000528:radiation effects; D010944:Plants / Q000235:genetics / Q000528:radiation effects*
chemical_list: D005875:Gibberellins; D010937:Plant Growth Regulators
references.citation: Annu Rev Genet. 2004;38:87-117
references.pmid: 15568973
references.citation: Plant J. 2003 Jul;35(1):57-70
references.pmid: 12834402
references.citation: Nature. 2005 Jun 30;435(7046):1251-6
references.pmid: 15988527
references.citation: Plant Physiol. 2007 Mar;143(3):1163-72
references.pmid: 17220364
references.citation: Plant J. 2004 Feb;37(4):505-16
references.pmid: 14756759
references.citation: Plant Physiol. 1999 Mar;119(3):909-15
references.pmid: 10069829
references.citation: Plant Physiol. 2004 Oct;136(2):2928-36
references.pmid: 15448197
references.citation: Plant Cell. 2004 Jun;16(6):1433-45
references.pmid: 15155879
references.citation: Ann Bot. 2005 Aug;96(2):169-75
references.pmid: 15894550
references.citation: EMBO J. 2007 Nov 14;26(22):4756-67
references.pmid: 17948056
references.citation: Plant Physiol. 2003 Dec;133(4):1643-53
references.pmid: 14605216
references.citation: Cell. 1996 Apr 19;85(2):183-94
references.pmid: 8612271
references.citation: Plant Physiol. 2007 Sep;145(1):106-18
references.pmid: 17644628
references.citation: Planta. 2003 Jan;216(3):422-31
references.pmid: 12520333
references.citation: Plant Physiol. 2004 Nov;136(3):3751-61
references.pmid: 15516515
references.citation: Physiol Plant. 2000 Feb;108(2):208-15
references.pmid: 11543153
references.citation: Plant Cell Environ. 2008 Feb;31(2):227-34
references.pmid: 17996011
references.citation: Nature. 2008 Jan 24;451(7177):475-9
references.pmid: 18216856
references.citation: Trends Plant Sci. 2004 Jun;9(6):309-14
references.pmid: 15165563
references.citation: Proc Natl Acad Sci U S A. 1998 Feb 17;95(4):1933-7
references.pmid: 9465120
references.citation: Nature. 2003 Jun 19;423(6942):881-5
references.pmid: 12815435
references.citation: Plant J. 2005 Jan;41(2):231-42
references.pmid: 15634200
references.citation: Mol Plant. 2008 Mar;1(2):368-79
references.pmid: 19825546
references.citation: Curr Opin Plant Biol. 2008 Feb;11(1):4-8
references.pmid: 18053757
references.citation: Plant Physiol. 1997 Apr;113(4):1051-8
references.pmid: 9112768
references.citation: PLoS Biol. 2007 Aug;5(8):e222
references.pmid: 17683202
references.citation: EMBO J. 2002 May 15;21(10):2441-50
references.pmid: 12006496
references.citation: Plant J. 2007 Jul;51(1):117-26
references.pmid: 17488236
references.citation: Genes Dev. 2000 Feb 1;14(3):257-71
references.pmid: 10673498
references.citation: Trends Plant Sci. 2007 Nov;12(11):514-521
references.pmid: 17933576
references.citation: Nature. 2007 Jul 19;448(7151):358-61
references.pmid: 17589502
references.citation: Plant J. 2008 Jan;53(2):312-23
references.pmid: 18047474
references.citation: Science. 1990 Jan 19;247(4940):329-32
references.pmid: 17735851
references.citation: Plant Physiol. 2006 May;141(1):85-96
references.pmid: 16565297
references.citation: Plant Cell Environ. 2007 May;30(5):590-9
references.pmid: 17407537
references.citation: Plant J. 2005 Dec;44(6):1023-35
references.pmid: 16359394
references.citation: Genes Dev. 2001 Aug 1;15(15):1985-97
references.pmid: 11485992
references.citation: Plant Physiol. 1996 Sep;112(1):337-42
references.pmid: 8819329
references.citation: Physiol Plant. 2002 Jun;115(2):311-319
references.pmid: 12060251
references.citation: Plant Cell. 2003 Dec;15(12):2816-25
references.pmid: 14615596
references.citation: Nat Cell Biol. 2008 May;10(5):625-8
references.pmid: 18425113
references.citation: Plant Physiol. 1993 Aug;102(4):1179-1184
references.pmid: 12231894
references.citation: Plant Physiol. 2006 May;141(1):299-309
references.pmid: 16531479
references.citation: Plant Cell. 2003 Oct;15(10):2399-407
references.pmid: 14508006
references.citation: Plant J. 2005 Apr;42(1):23-34
references.pmid: 15773851
references.citation: Nature. 2003 Dec 11;426(6967):680-3
references.pmid: 14668869
references.citation: Cell. 2008 Apr 4;133(1):177-91
references.pmid: 18394997
references.citation: Plant J. 2004 Apr;38(2):310-9
references.pmid: 15078333
references.citation: Plant Physiol. 2007 Nov;145(3):1043-51
references.pmid: 17827270
references.citation: Plant Cell Physiol. 2005 Jun;46(6):827-36
references.pmid: 15851402
references.citation: Plant J. 1999 Jan;17(1):63-71
references.pmid: 10069068
references.citation: Nature. 2007 Mar 8;446(7132):199-202
references.pmid: 17344852
references.citation: Plant Physiol. 2005 Jun;138(2):1106-16
references.pmid: 15923331
references.citation: Plant J. 2007 Feb;49(3):428-41
references.pmid: 17217468
references.citation: Planta. 2008 Apr;227(5):1115-25
references.pmid: 18214530
references.citation: Dev Cell. 2004 Aug;7(2):193-204
references.pmid: 15296716
references.citation: Curr Opin Plant Biol. 2005 Feb;8(1):77-85
references.pmid: 15653404
references.citation: Planta. 1999 Jul;209(1):136-42
references.pmid: 10467040
references.citation: Genes Dev. 2007 Aug 1;21(15):1863-8
references.pmid: 17671088
references.citation: Cell. 2008 Apr 4;133(1):164-76
references.pmid: 18394996
references.citation: Proc Natl Acad Sci U S A. 1997 Mar 18;94(6):2756-61
references.pmid: 11038610
references.citation: Plant Cell. 2007 Dec;19(12):3915-29
references.pmid: 18065691
references.citation: Plant Biol (Stuttg). 2006 May;8(3):371-81
references.pmid: 16807830
references.citation: Plant Cell. 1998 Sep;10(9):1479-87
references.pmid: 9724694
references.citation: Plant Physiol. 2003 Dec;133(4):1617-29
references.pmid: 14645734
references.citation: Trends Cell Biol. 2005 Nov;15(11):618-25
references.pmid: 16198569
references.citation: Genes Dev. 2005 Dec 1;19(23):2811-5
references.pmid: 16322556
references.citation: Nature. 2008 Jan 24;451(7177):480-4
references.pmid: 18216857
references.citation: Plant Physiol. 2002 Feb;128(2):734-41
references.pmid: 11842176
references.citation: Proc Natl Acad Sci U S A. 2004 Nov 16;101(46):16091-8
references.pmid: 15505214
references.citation: Proc Natl Acad Sci U S A. 1996 Apr 16;93(8):3530-5
references.pmid: 11607652
references.citation: Plant Physiol. 2004 Mar;134(3):1050-7
references.pmid: 14963246
references.citation: Genes Cells. 2006 Dec;11(12):1381-92
references.pmid: 17121545
references.citation: Plant J. 2008 Jan;53(2):324-35
references.pmid: 18053005