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Population size, plant performance, and genetic variation in the rare plant Arnica montana L. in the Rhön, Germany / Stefanie Kahmen (2000)
Titre : Population size, plant performance, and genetic variation in the rare plant Arnica montana L. in the Rhön, Germany Type de document : Tiré à part de revue Auteurs : Stefanie Kahmen ; Peter Poschlod Année de publication : 2000 Importance : 43-51 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Génétique et écologie (dynamique, démographique, sélection)
[CBNPMP-Thèmes] Variabilité en protéines, polymorphisme enzymatique
[CBNPMP-Thèmes] Variabilité morphologiqueMots-clés : Arnica montana L. Résumé : Phenotypic and genetic variation of the rare plant species Arnica montana L. were investigated in populations which had been fragmented by afforestation since 1930 in the Rhön, a mountain region in Central Germany. The aim of the study was to analyse whether small populations show less genetic variation and a lower fitness than large populations. Morphological and reproductive traits from eleven Arnica-populations of different size were examined in the field. Principal component analysis (PCA) reduced the nine traits measured to two main components, one of which correlated with phenotypic traits of the maternal plants in the field while the other corresponded to traits associated with offspring production, weight and germinability. The latter component, which we considered to be fitness-related, was significantly positively correlated with population size. We screened four isozymes to study the genetic variation of the populations. The mean number of alleles per locus (A), the mean observed heterozygosity (Ho), and the mean expected heterozygosity (He) were used to measure genetic variation. Population size and genetic variation were not significantly correlated. In addition, there were no significant correlations between the two main components of the PCA and genetic variation when controlling for population size. The results of the study suggest that small populations of plants exhibit a reduced reproductive success which could not be attributed to genetic erosion. It might be attributed to the longevity of the clonal A. montana that the genetic structure of the populations examined has remained unaffected by the habitat fragmentation so far. In addition, gene flow has probably still been taking place between the fragmented populations. Possibly, the reduced reproductive success of plants in the small populations was caused by missing availability of cross-compatible pollen because of a reduced set of S-alleles due to genetic drift. Furthermore, environmental maternal effects may have played an important role in reproduction and germinability. Lien pérenne : DOI : 10.1078/1439-1791-00007 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130696 Kahmen, S., Poschlod, P. 2000. Population size, plant performance, and genetic variation in the rare plant Arnica montana L. in the Rhön, Germany. Basic and applied ecology, 1 : 43-51.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 10864 K Tiré à part Centre de documentation Tirés à part Consultable Redécouverte de Dryopteris pallida (Bory) Maire & Petitmengin subsp. Pallida (Dryopteridaceae, Pteridophyta) en Corse / Gilles Dutartre in Journal de Botanique (Société Botanique de France), 11 (09/1999)
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Titre : Redécouverte de Dryopteris pallida (Bory) Maire & Petitmengin subsp. Pallida (Dryopteridaceae, Pteridophyta) en Corse Type de document : Imprimé Auteurs : Gilles Dutartre (1949-2020) ; Michel Boudrie ; Robert Deschâtres (1923-2016) Année de publication : 1999 Article en page(s) : 45-54 Langues : Français (fre) Catégories : [CBNPMP-Thèmes] Ptéridophytes, fougères
[CBNPMP-Thèmes] Localisation nouvelle
[CBNPMP-Thèmes] Variabilité morphologique
[CBNPMP-Thèmes] Biométrie
[CBNPMP-Thèmes] Caryologie, degré de ploïdie, nombre de chromosomes
[CBNPMP-Géographique] Corse (France)Mots-clés : Dryopteris pallida (Bory) Maire & Petitmengin ssp. pallida Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137081
in Journal de Botanique (Société Botanique de France) > 11 (09/1999) . - 45-54Dutartre, G., Boudrie, M., Deschâtres, R. 1999. Redécouverte de Dryopteris pallida (Bory) Maire & Petitmengin subsp. Pallida (Dryopteridaceae, Pteridophyta) en Corse. Journal de Botanique (Société Botanique de France), 11: 45-54.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité R11 P-182 Revue Centre de documentation Revues Consultable Regional variation in Argentinean populations of Bromus catharticus (Poaceae) as measured by morphological divergence associated with environmental conditions / Monica B. Aulicino in Anales del Jardín Botánico de Madrid (1979), 65 (1) (06/2008)
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Titre : Regional variation in Argentinean populations of Bromus catharticus (Poaceae) as measured by morphological divergence associated with environmental conditions Type de document : Imprimé Auteurs : Monica B. Aulicino ; Miguel J. Arturi Année de publication : 2008 Article en page(s) : 135-147 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Variabilité morphologique
[CBNPMP-Thèmes] Plantes subspontanées, naturalisées, envahissantesMots-clés : Bromus catharticus Vahl Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=140028
in Anales del Jardín Botánico de Madrid (1979) > 65 (1) (06/2008) . - 135-147Aulicino, MB., Arturi, MJ. 2008. Regional variation in Argentinean populations of Bromus catharticus (Poaceae) as measured by morphological divergence associated with environmental conditions. Anales del Jardín Botánico de Madrid (1979), 65(1): 135-147.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité R8225 P-122 Revue Centre de documentation Revues Consultable La structure multicaule du Genévrier thurifère : organisation et déterminisme / Valérie Bertaudière-Montès in Naturalia Maroccana, 2 (1-2) (01/2004)
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Titre : La structure multicaule du Genévrier thurifère : organisation et déterminisme Type de document : Imprimé Auteurs : Valérie Bertaudière-Montès ; Wadi Badri ; Nicolas Montès ; Mohamed Alifriqui Année de publication : 2004 Article en page(s) : 67-74 Langues : Français (fre) Catégories : [CBNPMP-Thèmes] Morphologie végétale
[CBNPMP-Thèmes] Variabilité morphologique
[CBNPMP-Thèmes] Biomasse et productionMots-clés : Juniperus thurifera L. Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=139281
in Naturalia Maroccana > 2 (1-2) (01/2004) . - 67-74Bertaudière-Montès, V., Badri, W., Montès, N., Alifriqui, M. 2004. La structure multicaule du Genévrier thurifère : organisation et déterminisme. Naturalia Maroccana, 2(1-2): 67-74.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité R4078 8250 Revue Centre de documentation Bibliothèque Consultable The influence of plant and corolla size on pollen deposition and seed set in Geranium sanguineum (Geraniaceae) / Marianne Philipp (2000)
Titre : The influence of plant and corolla size on pollen deposition and seed set in Geranium sanguineum (Geraniaceae) Type de document : Tiré à part de revue Auteurs : Marianne Philipp ; Thomas Hansen Année de publication : 2000 Importance : 129-140 Langues : Anglais (eng) Catégories : [CBNPMP-Thèmes] Stratégie de production de semences (fécondité)
[CBNPMP-Thèmes] Variabilité morphologiqueMots-clés : Geranium sanguineum L. Résumé : In a coastal grassland area the influence of plant and corolla size on insect visitation rate, pollen deposition on stigmas and seed set was measured in a natural population of Geranium sanguineum. Visits by bumble bees, the primal pollinators, were significantly affected by plant size measured as the number of flowers, and differences in visit rates among plants were explained by size differences among these. On average, larger plants had bigger corollas. The mean corolla area affected pollen deposition positively whereas deposition did neither affect seed set (number per flower) nor seed weight. Insects reaction to corolla size was dependent on plant size, and thus we found the effect of corolla size on pollen deposition to decline with plant size. Instead pollen deposition per plant seemed to be correlated to overall floral display. We argued that resource status of the individual plants could explain corolla size and seed set variation. The finding of some plant setting seeds while other plant with comparable size did not set any seeds could not be explained satisfactory by resource limitation. Lien pérenne : DOI : 10.1111/j.1756-1051.2000.tb01556.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=130512 Philipp, M., Hansen, T. 2000. The influence of plant and corolla size on pollen deposition and seed set in Geranium sanguineum (Geraniaceae). Nordic journal of botany, 20(2) : 129-140.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 8941 P Tiré à part Centre de documentation Tirés à part Consultable Les types biologiques du Silene vulgaris s.l. (Caryophyllaceae). (The life forms of Silene vulgaris s.l. (Caryophyllaceae) / David Aeschimann in Candollea, 35 (2) (1980)
PermalinkVariabilité biochimique et morphologique de Juniperus communis L. dans le sud de L'Europe / Maria Marcela Poveda (2003)
PermalinkVariabilité morphologique et polymorphisme enzymatique chez trois espèces du genre Lathyrus L. / Nedia Ben Brahim (1992)
PermalinkVariabilité phénotypique du Géranium cendré (Geranium cinereum ssp. cinereum). Préliminaires à un plan de gestion conservatoire / Vincent Devictor (2002)
PermalinkVariation altitudinale, écologique et génétique, et recherche de la différenciation écotypique chez deux espèces végétales alpines : Lotus alpinus (D.C.) Schleicher et Dactylis glomerata L. / Perrine Gauthier (1997)
PermalinkWhy do flowers vary? The functional ecology of variation in flower size and form within natural plant populations / Candace Galen (1999)
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