Phytochrome BPhytochromePhytochrome AHypocotylLightPhotoreceptor CellsArabidopsis ProteinsArabidopsisDarknessCryptochromesPhotoreceptors, PlantPlants, Genetically ModifiedGenes, PlantSeedlingBiliverdineGene Expression Regulation, PlantLight Signal TransductionPhotoperiodFlavoproteinsBile PigmentsPhycobilinsPhotoreceptor Cells, InvertebrateTranscription FactorsPlant ProteinsAvena sativaPhotobiologyFlowersTetrapyrrolesMutationPhototropismRNA, PlantPhotosynthetic Reaction Center Complex ProteinsBasic Helix-Loop-Helix Transcription FactorsSignal TransductionCotyledonPhycocyaninPhenotypeMolecular Sequence DataCircadian RhythmCell NucleusBase SequenceEtiolationApoproteins