Cabomba as a model for studies of early angiosperm evolution
2011
Vialette-Guiraud , Aurélie (INRA , Lyon (France). UMR 0879 Reproduction et Développement des Plantes) | Alaux , Michael (INRA , Versailles (France). UR 1164 Unité de Recherche Génomique-Info) | Legeai , Fabrice (INRA (France). UMR 1099 Biologie des Organismes et des Populations Appliquée à la Protection des Plantes) | Finet , Cédric (INRA , Lyon (France). UMR 0879 Reproduction et Développement des Plantes) | Chambrier , Pierre (INRA , Lyon (France). UMR 0879 Reproduction et Développement des Plantes) | Brown , Spencer C. (Centre National de la Recherche Scientifique, Gif sur Yvette(France). UPR2355 Institut des sciences du végétal (ISV) ) | Chauvet , Aurélie (INRA , Lyon (France). UMR 0879 Reproduction et Développement des Plantes) | Magdalena , Carlos (Royal Botanic Gardens, Kew, Richmond(Royaume Uni).) | Rudall , Paula J.(auteur de correspondance) (Royal Botanic Gardens, Kew, Richmond(Royaume Uni).) | Scutt , Charlie(auteur de correspondance) (INRA , Lyon (France). UMR 0879 Reproduction et Développement des Plantes)
Background The angiosperms, or flowering plants, diversified in the Cretaceous to dominate almost all terrestrial environments. Molecular phylogenetic studies indicate that the orders Amborellales, Nymphaeales and Austrobaileyales, collectively termed the ANA grade, diverged as separate lineages from a remaining angiosperm clade at a very early stage in flowering plant evolution. By comparing these early diverging lineages, it is possible to infer the possible morphology and ecology of the last common ancestor of the extant angiosperms, and this analysis can now be extended to try to deduce the developmental mechanisms that were present in early flowering plants. However, not all species in the ANA grade form convenient molecular-genetic models. Scope The present study reviews the genus Cabomba (Nymphaeales), which shows a range of features that make it potentially useful as a genetic model. We focus on characters that have probably been conserved since the last common ancestor of the extant flowering plants. To facilitate the use of Cabomba as a molecular model, we describe methods for its cultivation to flowering in the laboratory, a novel Cabomba flower expressed sequence tag database, a well-adapted in situ hybridization protocol and a measurement of the nuclear genome size of C. caroliniana. We discuss the features required for species to become tractable models, and discuss the relative merits of Cabomba and other ANA-grade angiosperms in molecular-genetic studies aimed at understanding the origin of the flowering plants.
اظهر المزيد [+] اقل [-]الكلمات المفتاحية الخاصة بالمكنز الزراعي (أجروفوك)
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تم تزويد هذا السجل من قبل Institut national de la recherche agronomique
