Ultrastructural aspects of pollen ontogeny in an endangered plant species, Pancratium maritimum L. (Amaryllidaceae)

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dc.authoridKonyar, Sevil Tütüncü/0000-0002-0737-7818
dc.authorwosidKonyar, Sevil Tütüncü/AAT-6279-2020
dc.authorwosidKonyar, Sevil Tütüncü/F-6708-2013
dc.contributor.authorKonyar, Sevil Tutuncu
dc.date.accessioned2024-06-12T11:16:52Z
dc.date.available2024-06-12T11:16:52Z
dc.date.issued2017
dc.departmentTrakya Üniversitesien_US
dc.description.abstractPollen ontogeny in Pancratium maritimum L. was studied from the sporogenous cell to mature pollen grain stages using transmission electron, scanning electron, and light microscopy to determine whether the pollen development in P. maritimum follows the basic scheme in angiosperms or not. In the course of microsporogenesis and microgametogenesis, special attention was given to the considerable ultrastructural changes that are observed in the cytoplasm of microsporocytes, microspores, and mature pollen grains throughout the successive stages of pollen development. Microsporocyte differentiation concerning number and ultrastructure of organelles facilitates the transition of microsporocytes from the sporophytic phase to the gametophytic phase. However, cytoplasmic differentiation of generative and vegetative cells supports their functional distinctness and pollen maturation. Although microsporogenesis and microgametogenesis in P. maritimum generally follow the usual angiosperm pattern, abnormalities such as formation of unreduced gametes were observed. During normal microsporogenesis, meiocytes undergo meiosis and successive cytokinesis, resulting in the formation of isobilateral, decussate, and linear tetrads. Subsequent to the development of free and vacuolated microspores, the first mitotic division occurs and bicellular monosulcate pollen grains are produced. Pollen grains are shed from the anther at binucleate stage. During pollen ontogeny, three periods of vacuolization were observed: in meiocytes, in mononucleate free microspores, and in the generative cell.en_US
dc.identifier.doi10.1007/s00709-016-0998-3
dc.identifier.endpage900en_US
dc.identifier.issn0033-183X
dc.identifier.issn1615-6102
dc.identifier.issue2en_US
dc.identifier.pmid27460470en_US
dc.identifier.scopus2-s2.0-84979653111en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage881en_US
dc.identifier.urihttps://doi.org/10.1007/s00709-016-0998-3
dc.identifier.urihttps://hdl.handle.net/20.500.14551/24488
dc.identifier.volume254en_US
dc.identifier.wosWOS:000394361400023en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.language.isoenen_US
dc.publisherSpringer Wienen_US
dc.relation.ispartofProtoplasmaen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectUltrastructureen_US
dc.subjectMicrosporogenesisen_US
dc.subjectMicrogametogenesisen_US
dc.subjectSporoderm Ontogenyen_US
dc.subjectPancratiumen_US
dc.subjectMonosulcate Pollen Grainen_US
dc.subjectHaemanthus-Katherinae-Bakeren_US
dc.subjectFine-Structureen_US
dc.subjectReproductive Ecologyen_US
dc.subjectAnther Developmenten_US
dc.subjectVegetative Cellsen_US
dc.subjectGenerative Cellsen_US
dc.subjectMale Meiosisen_US
dc.subjectCytoplasmen_US
dc.subjectPlastidsen_US
dc.subjectLiliumen_US
dc.titleUltrastructural aspects of pollen ontogeny in an endangered plant species, Pancratium maritimum L. (Amaryllidaceae)en_US
dc.typeArticleen_US

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