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Morphological and cytological variation in Spergularia echinosperma and S. rubra, and notes on potential hybridization of these two species / Pavel Kur in Preslia, vol. 84 (Année 2012)

Public [article]  inPreslia > vol. 84 (Année 2012) . - pp. 905-924 Titre : Morphological and cytological variation in Spergularia echinosperma and S. rubra, and notes on potential hybridization of these two species Auteurs : Pavel Kur, Auteur ; Milan Stech, Auteur ; Petr Koutecky, Auteur ; Pavel Travnicek, Auteur Année de publication : 2012 Article en page(s) : pp. 905-924 Langues : Anglais (eng) Catégories : [ZG] République tchèque Use for events after 1992. [Espèces (in biblio)] Spergularia echinosperma [Espèces (in biblio)] Spergularia echinosperma (Celak.) Asch. & Graebn. [Espèces (in biblio)] Spergularia rubra (L.) J.Presl & C.Presl Mots-clés : allopolyploïdie  classification  analyse discriminante linéaire (ADL)  flow cytometry  genome size  inter-ploidy hybridization  morphometric analysis  cytologie Résumé : "Morphological and cytological variation in Spergularia echinosperma and S. rubra and the possibility of these two species hybridizing were investigated. The plant material was collected mainly in the western- and southern-Bohemian pond basins where S. echinosperma is most abundant. Using flow cytometry, we found diploid and tetraploid cytotypes among plants morphologically identified as Type de publication : périodique Référence biblio : Kur P., Stech M., Koutecky P., Travnicek P., 2012 - Morphological and cytological variation in Spergularia echinosperma and S. rubra, and notes on potential hybridization of these two species. Preslia, 84 : 905-924. ID PMB : 55658 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=55658 [article]

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A morphometric study and revision of the Asplenium trichomanes group in the Czech Republic / Libor Ekrt in Preslia, vol. 80, n°3 (Année 2008)  

Public [article]  inPreslia > vol. 80, n°3 (Année 2008) . - pp. 325-347 Titre : A morphometric study and revision of the Asplenium trichomanes group in the Czech Republic Type de document : texte imprimé Auteurs : Libor Ekrt, Auteur ; Milan Stech, Auteur Année de publication : 2008 Article en page(s) : pp. 325-347 Langues : Anglais (eng) Catégories : [Espèces (in biblio)] Asplenium trichomanes [Espèces (in biblio)] Asplenium trichomanes L. subsp. hastatum (H.Christ) S.Jess. [Espèces (in biblio)] Asplenium trichomanes L. subsp. pachyrachis (H.Christ) Lovis & Reichst. [Espèces (in biblio)] Asplenium trichomanes L. subsp. quadrivalens D.E.Mey. [Espèces (in biblio)] Asplenium trichomanes L. subsp. trichomanes [ZG] Europe centrale [Thèmes] Fougères [Thèmes] Taxonomie Mots-clés : cytotype  cytométrie  morphométrie  clé de détermination Résumé : "A detailed cytogeographic and morphometric study of the Asplenium trichomanes group in the Czech Republic is presented. We detected diploid (2n = 72), tetraploid (2n = 144) and hybrid triploid plants (2n = 108). Based on the morphometric study, four intraspecific taxa are recognized. These taxa correspond to the four subspecies of A. trichomanes (A. t. subsp, trichomanes, A. t. subsp, quadrivalens, A. t. subsp, pachyrachis and A. t. subsp, hastatum) distinguished in the floras of western, southern and northern Europe. Triploid plants were determined as A. t. nothosubsp. lusaticum (A. t. subsp, trichomanes × A. t. subsp, quadrivalens). The individual morphological characters used for determining subspecies are evaluated and a determination key presented." (source : auteurs) Type de publication : périodique Référence biblio : Ekrt L., Stech M., 2008 - A morphometric study and revision of the Asplenium trichomanes group in the Czech Republic. Preslia, 80 (3) : 325-347. ID PMB : 69850 En ligne : https://botanika.prf.jcu.cz/systematics/publikace/2008_Ekrt_Stech_Preslia_AspTri [...] Format de la ressource électronique : document Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=69850 [article]

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Notes on the distribution of Spergularia echinosperma and the newly recognized species S. kurkae in Austria / Pavel Kur in Neilreichia, vol. 9 (Année 2018)

Public [article]  inNeilreichia > vol. 9 (Année 2018) . - pp. 269-282 Titre : Notes on the distribution of Spergularia echinosperma and the newly recognized species S. kurkae in Austria Auteurs : Pavel Kur, Auteur ; Clemens Pachschwöll, Auteur ; Milan Stech, Auteur Année de publication : 2018 Article en page(s) : pp. 269-282 Langues : Anglais (eng) Catégories : [ZG] Autriche [Espèces (in biblio)] Caryophyllaceae [Espèces (in biblio)] Spergularia [Espèces (in biblio)] Spergularia echinosperma [Thèmes] Clé de détermination [Thèmes] Morphologie végétale [Thèmes] Phytogéographie Résumé : "Spergularia echinosperma represents a rare species of dwarf rush communities (vegetation class Isoëto-Nano-Juncetea) bound to exposed bottoms of fishponds, sediment accumulations along rivers, exposed banks of oxbows, lakes and water reservoirs. Despite considered an endemic of Central Europe, S. echinosperma has only been poorly studied biosystematically until recently. Latest studies, however, radically changed our view of the species’ evolution and taxonomy. Spergularia kurkae – an allotetraploid hybrid between diploid S. echinosperma and tetraploid S. rubra described in 1989 – has been demonstrated to be a stabilized self-seeding species. It grows in similar habitats as S. echinosperma but mostly occurs as a complete orphan, i.e., in the absence of any of the parental species. In addition, a new subspecies within S. echinosperma – S. echinosperma subsp. albensis – has been described recently. Mapping the distributions of these only recently distinguished taxa has so far been limited to the Czech Republic and parts of Germany, and information on their occurrence in other Central European countries is still lacking. The main goal of this study was to map the distributions of S. kurkae and both subspecies of S. echinosperma in Austria, using data from revised herbarium material. Spergularia kurkae was identified from collections from seven localities on exposed margins of fishponds and a river reservoir in the Waldviertel region (Lower Austria). Most of these occurrences are recent, having been discovered and collected after the year 2000. In contrast, S. echinosperma subsp. albensis was only found in two historical localities on the banks of the March River, both of them dating back to the first half of the 20th century. The other subspecies, S. echinosperma subsp. echinosperma, was not found among the herbarium material revised. As more intense floristic research in suitable habitats could lead to the discovery of more localities of these rare taxa, we present an updated determination key, which should aid field determination of the Austrian representatives of the genus Spergularia." (source : auteurs) Type de publication : périodique Référence biblio : Kur P., Pachschwöll C., Stech M., 2018 - Notes on the distribution of Spergularia echinosperma and the newly recognized species S. kurkae in Austria. Neilreichia, 9 : 269-282. ID PMB : 71875 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=71875 [article]

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