title: Spatial-specific phytochrome responses during de-etiolation in Arabidopsis thaliana.
abstract: Photoreceptors exhibit complex regulation of many aspects of growth and development, including developmental-, spatial- and temporal-specific photoregulatory responses. Such diverse regulation has been noted for all major classes of photoreceptors in plants, including red/far-red (R/FR) absorbing phytochromes and blue/UV-A (B/UV-A) light-absorbing cryptochromes and phototropins. However, the most insight into spatiotemporal responses has been reported for phytochromes both at the physiological and, more recently, at the molecular levels. Through tissue-specific degradation of the phytochrome chromophore, my laboratory recently demonstrated that phytochromes exhibit light-dependent, spatiotemporal control over de-etiolation responses in Arabidopsis thaliana. Mesophyll-localized phytochrome A (phyA) controls numerous far-red high irradiance responses (FR-HIR) in Arabidopsis. Meristem- and/or leaf primordia-localized phytochromes are involved in the regulation of leaf development. In this addendum, I provide additional novel evidence for spatial-specific, blue-light-dependent signaling roles of phytochromes.
authors.affiliation: Department of Energy Plant Research Laboratory and Department of Biochemistry and Molecular Biology, Michigan State University, East Lansing, Michigan 48824, USA. montg133@msu.edu
authors.forename: Beronda L
authors.initials: BL
authors.lastname: Montgomery
references.citation: Annu Rev Genet. 2004;38:87-117
references.pmid: 15568973
references.citation: Plant Physiol. 2009 Jan;149(1):424-33
references.pmid: 18971430
references.citation: J Exp Bot. 2007;58(12):3113-24
references.pmid: 17905733
references.citation: Plant Cell. 1993 Jan;5(1):39-48
references.pmid: 8439743
references.citation: Plant Physiol. 1998 Sep;118(1):27-35
references.pmid: 9733523
references.citation: Plant Signal Behav. 2008 Dec;3(12):1053-60
references.pmid: 19513238
references.citation: Plant Signal Behav. 2008 Jan;3(1):47-8
references.pmid: 19704768
references.citation: Plant Cell. 2007 Jan;19(1):84-93
references.pmid: 17259260
references.citation: Plant J. 2001 May;26(3):283-94
references.pmid: 11439117
references.citation: Plant Cell. 2005 Jul;17(7):1941-52
references.pmid: 15965119
references.citation: Plant Physiol. 2001 Apr;125(4):1957-66
references.pmid: 11299375
references.citation: Trends Plant Sci. 2008 Mar;13(3):108-14
references.pmid: 18280200
references.citation: Plant J. 1998 Nov;16(4):465-71
references.pmid: 9881166
references.citation: Plant J. 2003 Jun;34(6):827-36
references.pmid: 12795702
references.citation: Plant Cell Environ. 2008 May;31(5):667-78
references.pmid: 18266901
references.citation: Plant Cell. 1993 Jul;5(7):757-68
references.pmid: 8364355
references.citation: Plant Physiol. 1999 Oct;121(2):629-39
references.pmid: 10517855
references.citation: Plant Physiol. 2001 Jan;125(1):266-77
references.pmid: 11154335
references.citation: Photochem Photobiol Sci. 2008 Oct;7(10):1243-52
references.pmid: 18846290
references.citation: Int J Dev Biol. 2005;49(5-6):653-64
references.pmid: 16096972
references.citation: Plant Cell. 2003 Sep;15(9):1981-9
references.pmid: 12953105
references.citation: Plant Physiol. 1993 May;102(1):269-277
references.pmid: 12231818
references.citation: Nat Rev Genet. 2007 Mar;8(3):217-30
references.pmid: 17304247
references.citation: Plant Cell. 1997 May;9(5):675-88
references.pmid: 9165746