MeristemGene Expression Regulation, PlantPlant ShootsArabidopsisArabidopsis ProteinsFlowersGenes, PlantPlant ProteinsInflorescenceCytokininsPlant RootsIndoleacetic AcidsMADS Domain ProteinsPlants, Genetically ModifiedPlant LeavesPlant StemsHomeodomain ProteinsZea maysMicroscopy, Electron, ScanningRNA, PlantPlant Growth RegulatorsPlant Root CapPhenotype