Linking photoreceptor excitation to changes in plant architecture
Year: 2012
Type: preprint
Abstract: 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.
Source: Genes & Development
Language: English
Topic: Light effects on plants
Subfield: Plant Science
Domain: Life Sciences
Open Access status: green
Awards: IGERT Plant System Biology Interdisciplinary Graduate Training Program, The Arabidopsis Transcription Factor ORFeome and downstream genomic application, Initial Events in Photoreceptor Signaling, Genome-wide transcription factor mapping in Arabidopsis thaliana, 1,001 (Epi) Genomes Project, Arabidopsis 2010: 1,001 Genomes Project, Genetic Analysis of Circadian Rhythms in Arabidopsis
OpenAlex ID: W2139364461