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'Astragalus' 
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Partager le résultat de cette rechercheGermplasm imageanalysis of Astragalus maritimus and A. verruscosus of Sardinia (subgen. Trimeniaeus, Fabaceae) / Efisio Mattana in Anales del Jardín Botánico de Madrid (1979), 65 (1) (06/2008)
Titre : Germplasm imageanalysis of Astragalus maritimus and A. verruscosus of Sardinia (subgen. Trimeniaeus, Fabaceae) Type de document : Imprimé Auteurs : Efisio Mattana ; Oscar Grillo ; Gianfranco Venora ; Gianluigi Bacchetta Année de publication : 2008 Article en page(s) : 149-155 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Variabilité morphologique
[CBNPMP-Thématique] TaxonomieMots-clés : Astragalus maritimus Astragalus verruscosus Astragalus Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=140029
in Anales del Jardín Botánico de Madrid (1979) > 65 (1) (06/2008) . - 149-155Mattana, Efisio, Grillo, Oscar, Venora, Gianfranco, Bacchetta, Gianluigi 2008 Germplasm imageanalysis of Astragalus maritimus and A. verruscosus of Sardinia (subgen. Trimeniaeus, Fabaceae). Anales del Jardín Botánico de Madrid (1979), 65(1): 149-155.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité R8225 P-122 Revue Centre de documentation Revues Consultable 
Titre : From flowering to dispersal : reproductive ecology of an endemic plant, Astragalus australis var. olympicus (Fabaceae) Type de document : Imprimé Auteurs : Thomas N. Kaye Année de publication : 1999 Article en page(s) : 1248-1256 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Système de reproduction Mots-clés : Astragalus Résumé : Astragalus australis var. olympicus is an endemic plant of the Olympic Mountains, Washington. It is considered a Species of Concern by the U.S. Fish and Wildlife Service. This study focused on the reproductive biology of the plant from flower production through seed germination to identify possible weak points that might contribute to its rarity and impede its conservation. Most plants produced a large mean number of flowers and ovules (314.8 and 4106, respectively), but relatively few of these formed fruits and seeds (25.8 and 3.8%, respectively). In decreasing importance, ovules in fruits were lost to predation, seed abortion, and lack of fertilization. The percentages of these fates differed among sites and years. Excluding pollinators by bagging flowers reduced fruit set by ∼50%, but seed set per fruit and seed mass were unaffected. Germination was affected by scarification, temperature, and moisture availability. About 11% of seeds damaged by predispersal seed predators (weevil larvae) remained viable and were released from dormancy. I hypothesize that predispersal seed predation (over 80% at one site) has a negative effect on population growth. Conservation of this species could benefit from improved fruit set and decreased seed predation. Identifiant : DOI : 10.2307/2656772 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137538
in American Journal of Botany > 86 (9) (1999) . - 1248-1256Kaye, Thomas N. 1999 From flowering to dispersal : reproductive ecology of an endemic plant, Astragalus australis var. olympicus (Fabaceae). American Journal of Botany, 86(9): 1248-1256.Documents numériques
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Article (1999)URL
Titre : Pollen-ovule ratio, pollen size, and breeding system in Astragalus (Fabaceae) subgenus Epiglottis : a pollen and seed allocation approach Type de document : Imprimé Auteurs : Rafael Gallardo ; Eugenio Dominguez ; Jesús M. Munoz Année de publication : 1994 Article en page(s) : 1611-1619 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Biologie de la reproduction
[CBNPMP-Thématique] PollinisateurMots-clés : Astragalus Résumé : The correlation between pollen/ovule (P/O) ratio and breeding system has generally been accounted for either on the basis that P/O reflects pollination efficiency, or in terms of the sex allocation theory. The following were assessed for taxa belonging to genus Astragalus subgenus Epiglottis: 1) Degree of correlation between P/O and the breeding system, measured by means of autofertility; 2) The absence or existence of correlation between P/O and pollen grain size; and 3) The ability of various theories to account for the results obtained. Results showed a minimal correlation between P/O and autofertility, and between P/O and pollen grain size in the taxa studied. Analysis of these results in terms of the sex allocation theory enabled this correlation to be explained as a function of the variation existing between taxa with respect to the resources invested in each pollen grain and in each ovule. The predictive capacity of this theory, which has moreover proven valuable in explaining the structural peculiarities of the androecium in these taxa, was also highlighted. The type of self-pollination applicable was also discussed, as was the phenotypic model of selection of self-fertilization considered most plausible for these taxa. Identifiant : DOI : 10.1002/j.1537-2197.1994.tb11473.x Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137536
in American Journal of Botany > 81 (12) (1994) . - 1611-1619Gallardo, Rafael, Dominguez, Eugenio, Munoz, Jesús M. 1994 Pollen-ovule ratio, pollen size, and breeding system in Astragalus (Fabaceae) subgenus Epiglottis : a pollen and seed allocation approach. American Journal of Botany, 81(12): 1611-1619.Documents numériques
article (1994)URL
Titre : Répartition des Astragalus et Oxytropis de France Type de document : Imprimé Auteurs : P. Aubin Année de publication : 1994 Article en page(s) : 12-13 Langues : Français (fre) Catégories : [CBNPMP-Thématique] Flore détermination, clé
[CBNPMP-Thématique] Inventaire floristiqueMots-clés : Astragalus Oxytropis Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=145201
in Le Monde des plantes > 449 (1994) . - 12-13Aubin, P. 1994 Répartition des Astragalus et Oxytropis de France. Le Monde des plantes, 449: 12-13.Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité R1539 P-58 Revue Centre de documentation Revues Consultable
