title: Histological analysis of pollen-pistil interactions in sour passion fruit plants (Passiflora edulis Sims).
abstract: The success of sexual plant reproduction is directly influenced by specific interactions between the pollen and pistil. Light, fluorescence and scanning electron microscopy techniques were used to evaluate the steps of pollination in sour passion fruit plants (Passiflora edulis Sims). In the compatible interaction, pollen tubes grow through stigma projections towards the ovary. The pollen grain surface was found to be spheroidal and to consist of heteroreticulate exine with six colpi. Furthermore, analysis in vivo of pollen-pistil interactions indicated that stigmas of flowers 24 hours before anthesis are unable to discriminate compatible (genetically unrelated) and incompatible (genetically related) pollen grains. Taken together, these results provide insight into the cellular mechanisms underlying pollination in passion fruit plants.
authors.affiliation: Laboratório de Melhoramento Genético Vegetal, Universidade Estadual do Norte Fluminense Darcy Ribeiro, Av. Alberto Lamego 2000, Horto, 28013-602, Campos dos Goytacazes, RJ, Brazil. herika.chagas@gmail.com
authors.forename: Hérika Chagas
authors.initials: HC
authors.lastname: Madureira
authors.forename: Telma Nair Santana
authors.initials: TN
authors.lastname: Pereira
authors.forename: Maura
authors.initials: M
authors.lastname: Da Cunha
authors.forename: Denise Espellet
authors.initials: DE
authors.lastname: Klein
mesh_terms: D035264:Flowers / Q000378:metabolism* / Q000648:ultrastructure*; D008855:Microscopy, Electron, Scanning; D008859:Microscopy, Polarization; D029598:Passiflora / Q000737:chemistry* / Q000502:physiology; D011058:Pollen / Q000378:metabolism* / Q000648:ultrastructure*; D054817:Pollination / Q000502:physiology*