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

2014
journal article
article
12
dc.abstract.enAn 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.affiliationWydział Biologii i Nauk o Ziemi : Instytut Botanikipl
dc.contributor.authorPłachno, Bartosz - 131446 pl
dc.contributor.authorMusiał, Krystyna - 130824 pl
dc.contributor.authorŚwiątek, Piotrpl
dc.contributor.authorTuleja, Monika - 132437 pl
dc.contributor.authorMarciniuk, Jolantapl
dc.contributor.authorGrabowska-Joachimiak, Aleksandrapl
dc.date.accessioned2015-04-09T07:47:33Z
dc.date.available2015-04-09T07:47:33Z
dc.date.issued2014pl
dc.date.openaccess0
dc.description.accesstimew momencie opublikowania
dc.description.number1pl
dc.description.physical211-217pl
dc.description.versionostateczna wersja wydawcy
dc.description.volume251pl
dc.identifier.doi10.1007/s00709-013-0539-2pl
dc.identifier.eissn1615-6102pl
dc.identifier.issn0033-183Xpl
dc.identifier.projectROD UJ / Ppl
dc.identifier.urihttp://ruj.uj.edu.pl/xmlui/handle/item/4673
dc.languageengpl
dc.language.containerengpl
dc.rightsUdzielam licencji. Uznanie autorstwa*
dc.rights.licenceCC-BY
dc.rights.urihttp://creativecommons.org/licenses*
dc.share.typeinne
dc.subject.enapomixispl
dc.subject.enegg apparatuspl
dc.subject.enfemale gametophytepl
dc.subject.enfiliform apparatuspl
dc.subject.ensynergidpl
dc.subject.enTaraxacumpl
dc.subtypeArticlepl
dc.titleSynergids and filiform apparatus in the sexual and apomictic dandelions from section Palustria (Taraxacum, Asteraceae)pl
dc.title.journalProtoplasmapl
dc.typeJournalArticlepl
dspace.entity.typePublication
dc.abstract.enpl
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.
dc.affiliationpl
Wydział Biologii i Nauk o Ziemi : Instytut Botaniki
dc.contributor.authorpl
Płachno, Bartosz - 131446
dc.contributor.authorpl
Musiał, Krystyna - 130824
dc.contributor.authorpl
Świątek, Piotr
dc.contributor.authorpl
Tuleja, Monika - 132437
dc.contributor.authorpl
Marciniuk, Jolanta
dc.contributor.authorpl
Grabowska-Joachimiak, Aleksandra
dc.date.accessioned
2015-04-09T07:47:33Z
dc.date.available
2015-04-09T07:47:33Z
dc.date.issuedpl
2014
dc.date.openaccess
0
dc.description.accesstime
w momencie opublikowania
dc.description.numberpl
1
dc.description.physicalpl
211-217
dc.description.version
ostateczna wersja wydawcy
dc.description.volumepl
251
dc.identifier.doipl
10.1007/s00709-013-0539-2
dc.identifier.eissnpl
1615-6102
dc.identifier.issnpl
0033-183X
dc.identifier.projectpl
ROD UJ / P
dc.identifier.uri
http://ruj.uj.edu.pl/xmlui/handle/item/4673
dc.languagepl
eng
dc.language.containerpl
eng
dc.rights*
Udzielam licencji. Uznanie autorstwa
dc.rights.licence
CC-BY
dc.rights.uri*
http://creativecommons.org/licenses
dc.share.type
inne
dc.subject.enpl
apomixis
dc.subject.enpl
egg apparatus
dc.subject.enpl
female gametophyte
dc.subject.enpl
filiform apparatus
dc.subject.enpl
synergid
dc.subject.enpl
Taraxacum
dc.subtypepl
Article
dc.titlepl
Synergids and filiform apparatus in the sexual and apomictic dandelions from section Palustria (Taraxacum, Asteraceae)
dc.title.journalpl
Protoplasma
dc.typepl
JournalArticle
dspace.entity.type
Publication

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