Phylogenetic analysis of sexual systems in Inuleae (Asteraceae)
Open Access
- 1 May 2009
- journal article
- research article
- Published by Wiley in American Journal of Botany
- Vol. 96 (5), 1011-1019
- https://doi.org/10.3732/ajb.0800231
Abstract
From an ancestor with bisexual flowers, plants with unisexual flowers, or even unisexual individuals have evolved in different lineages of angiosperms. The Asteraceae tribe Inuleae includes hermaphroditic, monoecious, dioecious, and gynomonoecious species. Gynomonoecy, the sexual system in which female and bisexual flowers occur on the same plant, is prevalent in the Asteraceae. We inferred one large gene phylogeny (ndhF) and two supertrees to investigate whether gynomonoecy was a stage in the evolution from hermaphroditism to monoecy. We identified transitions in sexual system evolution using the stochastic character mapping method. From gynomonoecious ancestors, both hermaphroditic and monoecious descendants have evolved. Gynomonoecy was not restricted to a stage in the evolution toward monoecy because the number of transitions and the rate of change from monoecy to gynomonoecy were much higher than the opposite. We also investigated one hypothesized association among female flowers and the development of a petaloid ray as an explanation of gynomonoecy maintenance in Asteraceae. We found that peripheral female flowers and petaloid rays were phylogenetically correlated. However, empirical evidence shows that a causal relationship between these traits is not clear.Keywords
Funding Information
- Universidad Rey Juan Carlos (PPR-2004-53)
- FPU
- Ministerio de Educación y Ciencia Español
- Vetenskapsrådet
This publication has 76 references indexed in Scilit:
- THE EVOLUTION OF DIOECY, HETERODICHOGAMY, AND LABILE SEX EXPRESSION IN ACEREvolution, 2007
- Phylogenetic relationships in Blumea (Asteraceae: Inuleae) as evidenced by molecular and morphological dataÖsterreichische botanische Zeitschrift, 2007
- Cost and benefits of attractive floral traits in the annual species Madia sativa (Asteraceae)Evolutionary Ecology, 2006
- ModelTest Server: a web-based tool for the statistical selection of models of nucleotide substitution onlineNucleic Acids Research, 2006
- Using molecular phylogenies to test phytogeographical links between East/South Africa–Southern Arabia and the Macaronesian islands—a review, and the case of Vierea and Pulicaria section Vieraeopsis (Asteraceae)Taxon, 2004
- A new species of Chrysophthalmum Schultz Bip. (Asteraceae-Inuleae) from TurkeyBotanical Journal of the Linnean Society, 2001
- The Cost of Floral Attractants in Achillea ptarmica (Asteraceae): Evidence from a Ray Removal ExperimentPlant Biology, 1999
- Evolution of Sexual Systems in Flowering PlantsAnnals of the Missouri Botanical Garden, 1981
- Parental strategies of angiospermsNew Zealand Journal of Botany, 1979
- BREEDING SYSTEMS IN COTULA L. (COMPOSITAE, ANTHEMIDEAE) II. MONOECIOUS POPULATIONSNew Phytologist, 1972