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United States Department of Agriculture

Agricultural Research Service

Research Project: MOLECULAR MECHANISMS OF PHYTOCHROME SIGNALING AND GENE REGULATION Title: Phytochrome functions in Arabidopsis development

Authors
item Franklin, Keara -
item Quail, Peter -

Submitted to: Journal of Experimental Botany
Publication Type: Review Article
Publication Acceptance Date: January 20, 2010
Publication Date: October 8, 2009
Repository URL: http://jxb.oxfordjournals.org/cgi/content/abstract/61/1/11?maxtoshow=&hits=10&RESULTFORMAT=1&author1=Quail&andorexacttitle=and&andorexacttitleabs=and&andorexactfulltext=and&searchid=1&FIRSTINDEX=0&sortspec=relevance&resourcetype=HWCIT
Citation: Franklin, K.A., Quail, P.H. 2009. Phytochrome functions in Arabidopsis development. Journal of Experimental Botany. 61(1)11-24; doi:10.1093/jxb/erp304.

Interpretive Summary: Light signals are fundamental to the growth and development of plants. Red and far-red light are sensed using the phytochrome family of plant photoreceptors. Individual phytochromes display both unique and overlapping roles throughout the life cycle of plants, regulating a range of developmental processes from seed germination to the timing of reproductive development. The evolution of multiple phytochrome photoreceptors has enhanced plant sensitivity to fluctuating light environments, diversifying phytochrome function, and facilitating conditional cross-talk with other signalling systems. The isolation of null mutants, deficient in all individual phytochromes, has greatly advanced understanding of phytochrome functions in the model species, Arabidopsis thaliana. The creation of mutants null for multiple phytochrome combinations has enabled the dissection of redundant interactions between family members, revealing novel regulatory roles for this important photoreceptor family. In this review, current knowledge of phytochrome functions in the light-regulated development of Arabidopsis is summarised.

Technical Abstract: Light signals are fundamental to the growth and development of plants. Red and far-red light are sensed using the phytochrome family of plant photoreceptors. Individual phytochromes display both unique and overlapping roles throughout the life cycle of plants, regulating a range of developmental processes from seed germination to the timing of reproductive development. The evolution of multiple phytochrome photoreceptors has enhanced plant sensitivity to fluctuating light environments, diversifying phytochrome function, and facilitating conditional cross-talk with other signalling systems. The isolation of null mutants, deficient in all individual phytochromes, has greatly advanced understanding of phytochrome functions in the model species, Arabidopsis thaliana. The creation of mutants null for multiple phytochrome combinations has enabled the dissection of redundant interactions between family members, revealing novel regulatory roles for this important photoreceptor family. In this review, current knowledge of phytochrome functions in the light-regulated development of Arabidopsis is summarised.

Last Modified: 12/19/2014
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