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Miscellaneous Notes on the Genus Sphagnum,1-2 / Howard Crum in The Bryologist, vol. 95, n°3 (Automne 1992)
[article]
Titre : Miscellaneous Notes on the Genus Sphagnum,1-2 Type de document : Livre Auteurs : Howard Crum, Auteur Année de publication : 1992 Article en page(s) : pp. 274-279 Langues : Anglais Mots-clés : Epidermal cells Hyalin Stem cells plante Branches Plant cells New species évolution Cylinders Résumé : "Sphagnum efibrillosum Andrews of Papua New Guinea is redescribed and illustrated, and its relationship to the Subsecunda rather than the section Isocladus is confirmed. Sphagnum bourbonense is described as a new species from Réunion in the relationship of S. capense Hornsch." (source : auteur) Type de publication : périodique Référence biblio : Crum H., 1992 - Miscellaneous Notes on the Genus Sphagnum,1-2. The Bryologist, 95 (3) : 274-279. ID PMB : 66078 Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66078
in The Bryologist > vol. 95, n°3 (Automne 1992) . - pp. 274-279[article]Exemplaires
Cote Localisation Disponibilité aucun exemplaire Phylogenetic Relationships among Sphagnum Sections : Hemitheca, Isocladus, and Subsecunda / Jonathan Shaw in The Bryologist, vol. 107, n°2 (Eté 2004)
[article]
Titre : Phylogenetic Relationships among Sphagnum Sections : Hemitheca, Isocladus, and Subsecunda Type de document : Livre Auteurs : Jonathan Shaw, Auteur ; C. Cox, Auteur ; Sandra Boles, Auteur Année de publication : 2004 Article en page(s) : pp. 189-196 Langues : Anglais Mots-clés : Plant cells Taxa Phylogenetics Phylogeny population génétique Hyalin Branches Genetic loci Solar fibrils gamétophyte Résumé : "Sphagnum macrophyllum, S. pylaesii, and S. cyclophyllum are morphologically atypical in the genus Sphagnum and their systematic placement has been a source of controversy. The first is generally classified in the mono-specific section Isocladus, and the second as section Hemitheca. Sphagnum cyclophyllum is classified in the section Subsecunda, but several authors have hypothesized a close relationship between all three species. Nucleotide sequences from eight nuclear and chloroplast loci were obtained to test hypotheses about relationships among these taxa. Phylogenetic analyses resolve these species (along with S. microcarpum, closely related to S. cyclophyllum) in a well-supported monophyletic group within the section Subsecunda. Sphagnum macrophyllum is sister to S. cyclophyllum, S. microcarpum, and S. pylaesii. Sphagnum cyclophyllum and S. microcarpum form a clade that is sister to S. pylaesii. Two mutually monophyletic groups of populations are resolved within S. pylaesii, one including the European populations and the other including populations from eastern North America and South America. The European populations are almost identical at the nucleotide sequence level whereas the American populations are genetically diverse. Short, delicate pseudopodia; exceptionally large opercula; and an absence or near absence of pseudostomata appear to be synapomorphies for the clade containing S. macrophyllum, S. microcarpum, S. cyclophyllum, and S. pylaesii." Type de publication : périodique Référence biblio : Shaw J., Cox C., Boles S., 2004 - Phylogenetic Relationships among Sphagnum Sections : Hemitheca, Isocladus, and Subsecunda. The Bryologist, 107 (2) : 189-196. Permalink : http://www.cbnbrest.fr/catalogue_en_ligne/index.php?lvl=notice_display&id=66079
in The Bryologist > vol. 107, n°2 (Eté 2004) . - pp. 189-196[article]Exemplaires
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