Occurrence of polytene chromosomes in the bicellular and mature pollen grains of 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.accessioned2024-06-12T10:51:22Z
dc.date.available2024-06-12T10:51:22Z
dc.date.issued2016
dc.departmentTrakya Üniversitesien_US
dc.description.abstractEndoreduplication is a modified form of mitotic cycle in which repeated rounds of DNA replication occur without chromosome segregation and cell division, leading to formation of larger and thicker chromosomes called polytenics. In the present study, spontaneous formation of polytene chromosomes in the generative nuclei of pollen grains of Amaryllidaceae, and presumably in angiosperms, was described for the first time. For this purpose, microspores and mature pollens of the endangered species Pancratium maritimum L. were examined by light and transmission electron microscopy with a special reference to the observation of polytenic nuclei. Polytene chromosomes were detected in most of the generative cells of young bicellular pollen grains and mature pollen grains found in some anther locules, but they were rare or absent in the other anther locules. Polytenization of chromosomes did not follow the same pattern in all of the pollen grains. Polytene structures found in the developing pollen grains of P. maritimum exhibited variation from a diffuse to a condensed state and from reticulate to cable-like structures with different degrees of bonding. In addition to cryptic polyteny, cable-like polytene chromosomes with bands resembling classic polytene chromosomes were also detected. However, some nuclei did not exhibit polytenic structure clearly. Morphological changes in polytene chromosomes that are caused by the formation of functional structures such as DNA amplification, puffing and looping were also recognized. Other reasons for morphological differences of polytene chromosomes are discussed in detail.en_US
dc.identifier.doi10.1080/23818107.2016.1156572
dc.identifier.endpage190en_US
dc.identifier.issn2381-8107
dc.identifier.issn2381-8115
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-84992187828en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage181en_US
dc.identifier.urihttps://doi.org/10.1080/23818107.2016.1156572
dc.identifier.urihttps://hdl.handle.net/20.500.14551/18340
dc.identifier.volume163en_US
dc.identifier.wosWOS:000377593800012en_US
dc.identifier.wosqualityQ4en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSoc Botanique Franceen_US
dc.relation.ispartofBotany Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAmaryllidaceaeen_US
dc.subjectEndoploidyen_US
dc.subjectEndoreduplication Cycleen_US
dc.subjectGenerative Nucleusen_US
dc.subjectPancratium Maritimumen_US
dc.subjectPolytene Chromosomesen_US
dc.subjectCalliphora-Erythrocephalaen_US
dc.subjectDna Amplificationen_US
dc.subjectSuspensor Cellsen_US
dc.subjectPhaseolusen_US
dc.subjectEndospermen_US
dc.subjectEndoreduplicationen_US
dc.subjectWheaten_US
dc.subjectReplicationen_US
dc.subjectArabidopsisen_US
dc.titleOccurrence of polytene chromosomes in the bicellular and mature pollen grains of endangered plant species Pancratium maritimum L. (Amaryllidaceae)en_US
dc.typeArticleen_US

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