[article]
| Titre : |
Contemporary evolution of plant reproductive strategies under global change is revealed by stored seeds |
| Type de document : |
Imprimé |
| Auteurs : |
Michel Thomann (1987-) ; Éric Imbert ; Rachel Engstrand ; Pierre-Olivier Cheptou |
| Année de publication : |
2015 |
| Article en page(s) : |
766-778 |
| Langues : |
Anglais (eng) |
| Catégories : |
[CBNPMP-Thématique] Messicole
|
| Résumé : |
Global change is expected to impose new selection pressures on natural populations. Phenotypic responses, such as earlier phenology in response to climate warming, have been repeatedly observed in the field. The recent pollinator decline is also expected to change selection on reproductive traits in flowering plants. However, it remains unclear whether short-term adaptation of plant reproductive strategies occurs in response to global change. In this study, we report the evolution of some important reproductive traits of the annual self-incompatible weed Centaurea cyanus. In a common garden experiment, we germinated stored seeds, sampled 18 years apart from the same location, in a region where warmer springs and indices of pollinator decline have been reported. Compared to the ancestral population (1992), our results showed that plants of the descendant population (2010) flowered earlier and also produced larger capitula with longer receptivity and a larger floral display. QST -FST comparisons indicated that natural selection has likely contributed to the evolution of some of the traits investigated. Lower FST within temporal samples than among spatial samples further suggests a limited role of gene flow from neighbouring populations. We therefore propose that trait shifts could partly be due to adaptation to global change. |
| Lien pérenne : |
DOI : 10.1111/jeb.12603  |
| Permalink : |
https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=148485 |
in Journal of Evolutionary Biology > 28 (4) (April 2015) . - 766-778
Thomann, Michel (1987-), Imbert, Éric, Engstrand, Rachel, Cheptou, Pierre-Olivier
2015
Contemporary evolution of plant reproductive strategies under global change is revealed by stored seeds.
Journal of Evolutionary Biology, 28(4): 766-778.
|
Affiner la rechercheContemporary evolution of plant reproductive strategies under global change is revealed by stored seeds in Journal of Evolutionary Biology, 28 (4) (April 2015)
