Transcription profiling of Arabidopsis thaliana phytochrome interacting factors 4 and 5 redundantly limit seedling de-etiolation in continuous far-red light.

ABSTRACT: Phytochromes are red/far red photosensors regulating numerous developmental programs in plants. Among them phytochrome A (phyA) is essential to enable seedling de-etiolation in continuous far-red (FR) light a condition mimicking the environment under a dense canopy. The ecological relevance of this response is demonstrated by the high mortality rate of phyA mutants germinating in deep vegetational shade. phyA signaling involves a direct interaction of the photoreceptor with members of the bHLH transcription factor family, PIF1 and PIF3 (Phytochrome Interacting Factor). Here we investigated the involvement of PIF4 and PIF5 in phyA signaling and found that they redundantly control de-etiolation in FR light. The pif4pif5 double mutant is hypersensitive to low fluence rates of FR light. This p

ORGANISM(S): Arabidopsis thaliana

SUBMITTER: Sylvain Pradervand 

PROVIDER: E-GEOD-16333 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress