Transcription profiling of Arabidopsis phyA and phyB mutants, and wild type plants, grown in the dark

ABSTRACT: Phytochromes mediate a profound developmental shift when dark-grown seedlings are exposed to light. Here we show that a subset of genes is up regulated in phytochrome B (phyB) mutants even before dark-grown seedlings are exposed to light. Most of these genes bear the RY cis motif, which is a binding site of the transcription factor ABSCISIC ACID INSENSITIVE 3 (ABI3), and the phyB mutation also enhanced ABI3 expression. These changes in transcriptome have physiological consequences as seedlings of the abi3 mutant showed enhanced responses to pulses of far-red light, while ABI3 overexpressers exhibited the opposite pattern. Seedlings of the wild type derived from seeds germinated in full darkness showed enhanced expression of genes bearing the RY cis motif and reduced responses to far-red li

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Maria Agustina Mazzella 

PROVIDER: E-GEOD-3038 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress