GymnospermsAngiospermsGerm Cells, PlantOvuleFernsPollenPiceaConiferophytaGenes, PlantGametogenesis, PlantCycasPhylogenyGametogenesisPollen TubeBryophytaArabidopsisSeedsGene Expression Regulation, PlantFlowersPteridaceaePinusDNA, PlantBryopsidaGenome, PlantPlant ProteinsPinus taedaPlantsTaxusEvolution, MolecularRNA, PlantArabidopsis ProteinsGinkgo bilobaPinaceaeSelaginellaceaeBiological EvolutionPolypodiaceaeZamiaceaePiperaceaeMarsileaceaePlant InfertilityTreesEndospermSporesCycadophytaMolecular Sequence DataReproductionFossilsPterisDNA, ChloroplastEphedraGerminationLigninOcoteaPlants, Genetically ModifiedCambiumNymphaeaceaeGenome, ChloroplastPollinationHaploidyGnetumPlant Physiological PhenomenaPlant LeavesFertilizationSelf-FertilizationSpecies SpecificityPhloemMultigene FamilyMADS Domain ProteinsPseudotsugaHyacinthusPlastidsNymphaeaNupharCupressaceaePteridiumAmino Acid SequencePlant Components, AerialExtinction, BiologicalBotanyMutationGene DuplicationPlant DevelopmentDryopterisSequence AlignmentBase SequenceWoodGenome, PlastidSequence Homology, Amino AcidMeristemDNA, ComplementaryExpressed Sequence TagsThysanopteraCunninghamiaPinus sylvestrisPhaeophytaChloroplastsDNA ShufflingViridiplantaeSequence Analysis, DNABrassicaceae