A conspectus of Tephroseris (Asteraceae: Senecioneae) in Europe outside Russia and notes on the decline of the genus / Joachim W. Kadereit in Willdenowia, vol. 51, n°2 (Année 2021)

Public [article]  inWilldenowia > vol. 51, n°2 (Année 2021) . - pp. 271-317 Titre : A conspectus of Tephroseris (Asteraceae: Senecioneae) in Europe outside Russia and notes on the decline of the genus Type de document : Livre Auteurs : Joachim W. Kadereit, Auteur ; Paula Laux, Auteur ; Markus S. Dillenberger, Auteur Année de publication : 2021 Article en page(s) : pp. 271-317 Langues : Anglais Catégories : [Espèces (in biblio)] Asteraceae [Espèces (in biblio)] Tephroseris [ZG] Europe Mots-clés : Senecioneae Résumé : "Tephroseris is generally considered a difficult genus. Based on the examination of extensive herbarium material and considering the existing literature, we recognize seven species in Europe outside Russia. These are T. palustris, T. integrifolia with subsp. integrifolia, subsp. aurantiaca, subsp. capitata, subsp. maritima, subsp. serpentini and subsp. “tundricola”, T. balbisiana, T. crispa, T. helenitis, T. longifolia and T. papposa. Phylogenetic analysis of ITS and ETS sequences showed that these species fall into three lineages. These are: (1) T. palustris, clearly related to Arctic species of the genus; (2) T. integrifolia; and (3) the remaining species. Molecular dating of the T. integrifolia lineage resulted in a crown group age of 1.76 (0.85–2.87) million years. Possible reasons for taxonomic difficulties in the genus in Europe outside Russia may include its young phylogenetic age and extensive migration and genetic admixture in the Quaternary. The decline of the genus in Europe outside Russia is documented and discussed. We consider it possible that its decline is related to rising global temperatures." (source : auteur) Type de publication : périodique Référence biblio : Kadereit J., Laux P., Dillenberger M., 2021 - A conspectus of Tephroseris (Asteraceae: Senecioneae) in Europe outside Russia and notes on the decline of the genus. Willdenowia, 51 (2) : 271-317. ID PMB : 70325 DOI : https://doi.org/10.3372/wi.51.51209 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70325 [article]

Exemplaires

Cote	Localisation	Disponibilité
P0170	Brest	Disponible

The distinction between Sagina apetala and S. micropetala (Caryophyllaceae : Sagineae), their phylogenetic relationships, and a note on the coastal origin of some widespread ruderals / Markus S. Dillenberger in Willdenowia, vol. 52, n°1 (Année 2022)

Public [article]  inWilldenowia > vol. 52, n°1 (Année 2022) . - pp. 5-23 Titre : The distinction between Sagina apetala and S. micropetala (Caryophyllaceae : Sagineae), their phylogenetic relationships, and a note on the coastal origin of some widespread ruderals Type de document : Livre Auteurs : Markus S. Dillenberger, Auteur ; Joachim W. Kadereit, Auteur Année de publication : 2022 Article en page(s) : pp. 5-23 Langues : Allemand Catégories : [Espèces (in biblio)] Caryophyllaceae [Espèces (in biblio)] Sagina apetala [Espèces (in biblio)] Sagina filicaulis [Espèces (in biblio)] Sagina maritima [Espèces (in biblio)] Sagina micropetala Mots-clés : phylogénie  comparaison d'espèces Résumé : "The distinction of the annual Sagina apetala and S. micropetala (= S. apetala subsp. erecta, S. filicaulis) is based mainly on the position of sepals in fruit and shape and colour of the sepals, but identification of the two species is difficult. A molecular phylogeny of material identified as S. apetala and S. micropetala as well as other species of the genus using two nuclear and two plastid markers showed that there exist two lineages that are sister to each other and can be unambiguously distinguished molecularly. Although many of the morphological characters used in the literature proved useful in distinguishing these two lineages, sepal indumentum is the most reliable character to discriminate between them in Germany. Whereas S. micropetala usually has glabrous sepals, the sepals of S. apetala usually are glandular-pubescent. The chromosome number of 2n = 12 for S. micropetala, here determined for the first time, is identical to that of S. apetala, supporting the close relationship between the two species. Sagina apetala and S. micropetala are sister to S. maritima, an annual species from European coasts, which may imply a coastal origin of the two species. A brief review of the possible origin of other European ruderals from coastal relatives is provided." (source : auteurs) Type de publication : périodique Référence biblio : Dillenberger M., Kadereit J., 2022 - The distinction between Sagina apetala and S. micropetala (Caryophyllaceae : Sagineae), their phylogenetic relationships, and a note on the coastal origin of some widespread ruderals. Willdenowia, 52 (1) : 5-23. ID PMB : 70454 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=70454 [article]

Exemplaires

Cote	Localisation	Disponibilité
P0170	Brest	Disponible

What is the origin of the Scottish populations of the European endemic Cherleria sedoides (Caryophyllaceae)? / F. J. Valtueña in New Journal of botany, vol. 5, n°1 (Année 2015)

Public [article]  inNew Journal of botany > vol. 5, n°1 (Année 2015) . - pp. 13-25 Titre : What is the origin of the Scottish populations of the European endemic Cherleria sedoides (Caryophyllaceae)? Type de document : Livre Auteurs : F. J. Valtueña, Auteur ; Markus S. Dillenberger, Auteur ; Joachim W. Kadereit, Auteur ; A.J. Moore, Auteur ; Christopher David Preston (1955-….), Auteur Année de publication : 2015 Article en page(s) : pp. 13-25 Langues : Anglais Catégories : [Espèces (in biblio)] Minuartia [ZG] Europe [Thèmes] Alpes [Thèmes] Montagne [Thèmes] Pyrénées Mots-clés : Arctique Résumé : "Cherleria sedoides L. (Minuartia sedoides (L.) Hiern) is a montane perennial which, with some species in Minuartia sect. Spectabiles, is more closely related to Scleranthus than to other Minuartia species and is therefore best restored to the reinstated and redefined genus Cherleria. Reconstruction of the ancestral area of the clade containing C. sedoides suggests that it evolved in the Alps or the Balkan peninsula. The species now has an unusual distribution, being present in the mountains of southern Europe and Scotland but absent from the Arctic. Three historical scenarios that might have led to the presence of the species in Scotland are outlined and tested by a molecular analysis comparing Scottish populations with populations from the Pyrenees and the Alps. The sampled populations show little variation in internal transcribed spacer (ITS)/external transcribed spacer (ETS) but much more in cpDNA. The latter reveals a major division between some Alpine material and the other Alpine, Pyrenean and Scottish plants. Once the anomalous Alpine haplotypes are excluded, Scottish populations are at least as variable as those from the Alps and Pyrenees, and are closely related to both. We conclude that they have not undergone a long period of isolation, nor have they originated by recent, long-distance dispersal from the Alps or Pyrenees. They appear to be derived from a metapopulation that was probably widespread at the last glacial maximum (LGM) and gave rise to the Alpine, Pyrenean and Scottish plants." (source : auteur) Type de publication : périodique Référence biblio : Valtueña F.-J., Dillenberger M.-S., Kadereit J.-W., 2015 - What is the origin of the Scottish populations of the European endemic Cherleria sedoides (Caryophyllaceae)? New Journal of botany, 5 (1) : 13-25. ID PMB : 60202 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=60202 [article]

Exemplaires

Cote	Localisation	Disponibilité
P0130-5	Brest	Exclu du prêt

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