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Pollen limitation of reproductive success in two sympatic alpine willows (Salicaceae) with contrasting pollination strategies / Ørjan Totland in American Journal of Botany, 88 (6) (2001) 

Public Citation [article]  inAmerican Journal of Botany > 88 (6) (2001) . - 1011-1015 Titre : Pollen limitation of reproductive success in two sympatic alpine willows (Salicaceae) with contrasting pollination strategies Type de document : Imprimé Auteurs : Ørjan Totland (1968-) ; Matteo Sottocornola Année de publication : 2001 Article en page(s) : 1011-1015 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Biologie de la reproduction Mots-clés : Salix lapponum L. Résumé : We compared the extent of pollen limitation on female reproductive success of Salix lanata L., an entirely insect-pollinated willow, and S. lapponum L., which is 50 : 50% insect : wind pollinated (ambophilous). Supplemental hand-pollination significantly increased seed number per fruit by nearly 50% in the insect-pollinated willow, but had no significant impact on seed number in the dually pollinated species. Fruit set was not affected by the treatment in either of the species. These results demonstrate that pollen limitation on reproductive success is most pronounced in the species that depends entirely on insects for pollination. In general, pollinator visitation was highest to S. lapponum, but bumble bees were only observed on S. lanata, suggesting that the quantity and quality of pollinator visitation differed between the species. Our results empirically support the hypothesis that a dual pollination strategy is most effective in alpine environments with low and infrequent pollinator activity and high wind speeds. Lien pérenne : DOI : 10.2307/2657082 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137421 Totland, Ørjan (1968-), Sottocornola, Matteo 2001 Pollen limitation of reproductive success in two sympatic alpine willows (Salicaceae) with contrasting pollination strategies. American Journal of Botany, 88(6): 1011-1015.

Documents numériques

Consultable article (2001) URL

Population structure and genetic diversity of Botrychium pumicola (Ophioglossaceae) based on inter-simple sequence repeats (ISSR) / Francisco J. Camacho in American Journal of Botany, 88 (6) (2001) 

Public Citation [article]  inAmerican Journal of Botany > 88 (6) (2001) . - 1065-1070 Titre : Population structure and genetic diversity of Botrychium pumicola (Ophioglossaceae) based on inter-simple sequence repeats (ISSR) Type de document : Imprimé Auteurs : Francisco J. Camacho ; Aaron Liston Année de publication : 2001 Article en page(s) : 1065-1070 Langues : Anglais (eng) Catégories : [CBNPMP-Thématique] Génétique et écologie (dynamique, démographique, sélection) Mots-clés : Botrychium Résumé : Species of Botrychium reproduce by spores that form subterranean gametophytes and a few, like B. pumicola, also reproduce asexually with subterranean sporophytic gemmae. The goal of this study was to examine the genetic diversity of B. pumicola populations and to better understand the role of gemmae. Ninety-nine individuals from three monitored populations were sampled. The technique of inter-simple sequence repeats (ISSR) produced 15 polymorphic loci and identified 71 ISSR genotypes. Sixteen of the ISSR genotypes were shared by more that one individual in a population, representing potential clones. Ten of the 16 shared genotypes were not limited to clusters of plants (groups of plants growing from the same point). The ten potential clones were disjunct (separated by other genotypes) and not in patches as might be expected for an underground propagule. There is a high probability that these shared genotypes arose from independent sexual events suggesting they were not clones. These results suggest that the long-distance dispersal of gemmae is at best a rare event. Lien pérenne : DOI : 10.2307/2657089 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=137620 Camacho, Francisco J., Liston, Aaron 2001 Population structure and genetic diversity of Botrychium pumicola (Ophioglossaceae) based on inter-simple sequence repeats (ISSR). American Journal of Botany, 88(6): 1065-1070.

Documents numériques

Consultable article (2001) URL