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Synergids and filiform apparatus in the sexual and apomictic dandelions from section Palustria (Taraxacum, Asteraceae)

Synergids and filiform apparatus in the sexual and ...

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dc.contributor.author Płachno, Bartosz [SAP11019179] pl
dc.contributor.author Musiał, Krystyna [SAP11011970] pl
dc.contributor.author Świątek, Piotr pl
dc.contributor.author Tuleja, Monika [SAP12015374] pl
dc.contributor.author Marciniuk, Jolanta pl
dc.contributor.author Grabowska-Joachimiak, Aleksandra pl
dc.date.accessioned 2015-04-09T07:47:33Z
dc.date.available 2015-04-09T07:47:33Z
dc.date.issued 2014 pl
dc.identifier.issn 0033-183X pl
dc.identifier.uri http://ruj.uj.edu.pl/xmlui/handle/item/4673
dc.language eng pl
dc.title Synergids and filiform apparatus in the sexual and apomictic dandelions from section Palustria (Taraxacum, Asteraceae) pl
dc.type JournalArticle pl
dc.description.physical 211-217 pl
dc.abstract.en An evolutionary trend to reduce “unnecessary costs” associated with the sexual reproduction of their amphimictic ancestors, which may result in greater reproductive success, has been observed among the obligatory apomicts. However, in the case of the female gametophyte, knowledge about this trend in apomicts is not sufficient because most of the ultrastructural studies of the female gametophyte have dealt with amphimictic angiosperms. In this paper, we tested the hypothesis that, in contrast to amphimictic plants, synergids in apomictic embryo sacs do not form a filiform apparatus. We compared the synergid structure in two dandelions from sect. Palustria: the amphimictic diploid Taraxacum tenuifolium and the apomictic tetraploid, male-sterile Taraxacum brandenburgicum. Synergids in both species possessed a filiform apparatus. In T. brandenburgicum, both synergids persisted for a long time without any degeneration, in spite of the presence of an embryo and endosperm. We propose that the persistent synergids in apomicts may play a role in the transport of nutrients to the embryo. pl
dc.subject.en apomixis pl
dc.subject.en egg apparatus pl
dc.subject.en female gametophyte pl
dc.subject.en filiform apparatus pl
dc.subject.en synergid pl
dc.subject.en Taraxacum pl
dc.description.volume 251 pl
dc.description.number 1 pl
dc.identifier.doi 10.1007/s00709-013-0539-2 pl
dc.identifier.eissn 1615-6102 pl
dc.title.journal Protoplasma pl
dc.language.container eng pl
dc.affiliation Wydział Biologii i Nauk o Ziemi : Instytut Botaniki pl
dc.subtype Article pl
dc.rights.original CC-BY; inne; ostateczna wersja wydawcy; w momencie opublikowania; 0; pl
.pointsMNiSW [2014 A]: 30


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