Linking photoreceptor excitation to changes in plant architecture

Li, L., Ljung, K., Breton, G., Schmitz, R. J., Pruneda-Paz, J., Cowing-Zitron, C., Cole, B. J., Ivans, L. J., Pedmale, U. V., Jung, H. S., Ecker, J. R., Kay, S. A., Chory, J. (April 2012) Linking photoreceptor excitation to changes in plant architecture. Genes Dev, 26 (8). pp. 785-90. ISSN 0890-9369

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DOI: 10.1101/gad.187849.112


Plants sense neighbor proximity as a decrease in the ratio of red to far-red light, which triggers a series of developmental responses. In Arabidopsis, phytochrome B (PHYB) is the major sensor of shade, but PHYB excitation has not been linked directly to a growth response. We show that the basic helix-loop-helix (bHLH) transcription factor PIF7 (phytochrome-interacting factor 7), an interactor of PHYB, accumulates in its dephosphorylated form in shade, allowing it to bind auxin biosynthetic genes and increase their expression. New auxin synthesized through a PIF7-regulated pathway is required for shade-induced growth, linking directly the perception of a light quality signal to a rapid growth response.

Item Type: Paper
Uncontrolled Keywords: Arabidopsis/anatomy & histology/genetics/*growth & development Arabidopsis Proteins/genetics/*metabolism DNA-Binding Proteins/genetics/*metabolism Gene Expression/drug effects Gene Expression Regulation, Plant Indoleacetic Acids/*metabolism/pharmacology Light Mutation Phytochrome B/metabolism
Subjects: organism description > plant > Arabidopsis
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > DNA binding protein
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > genes, structure and function > gene expression
organism description > plant
CSHL Authors:
Communities: CSHL labs > Pedmale lab
Depositing User: Matt Covey
Date: 15 April 2012
Date Deposited: 13 Jun 2016 17:06
Last Modified: 03 Nov 2017 20:06
PMCID: PMC3337452
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