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Auteur Pierre-Olivier Cheptou |
Documents disponibles écrits par cet auteur (3)
Affiner la recherche4th international symposium on environmental weeds and invasive plants. Abstracts. / Guillaume Fried (2014)
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Résumés (2014)Adobe Acrobat PDFContemporary evolution of plant reproductive strategies under global change is revealed by stored seeds / Michel Thomann in Journal of Evolutionary Biology, 28 (4) (April 2015)
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) . - 766-778Thomann, 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.Documents numériques
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Article (2015)URL
Titre : Ongoing convergent evolution of a selfing syndrome threatens plant–pollinator interactions Type de document : Imprimé Auteurs : Samson Acoca-Pidolle ; Perrine Gauthier ; Louis Devresse ; Antoine Deverge Merdrignac ; Virginie Pons ; Pierre-Olivier Cheptou Année de publication : 2023 Article en page(s) : 1-10 Langues : Anglais (eng) Catégories : [LOTERRE-Biodiversité] Pollinisateur
[CBNPMP-Thématique] Relations et interactions individus-espècesMots-clés : Viola arvensis Résumé : Plant–pollinator interactions evolved early in the angiosperm radiation. Ongoing environmental changes are however leading to pollinator declines that may cause pollen limitation to plants and change the evolutionary pressures shaping plant mating systems. We used resurrection ecology methodology to contrast ancestors and contemporary descendants in four natural populations of the field pansy (Viola arvensis) in the Paris region (France), a depauperate pollinator environment. We combine population genetics analysis, phenotypic measurements and behavioural tests on a common garden experiment. Population genetics analysis reveals 27% increase in realized selfing rates in the field during this period. We documented trait evolution towards smaller and less conspicuous corollas, reduced nectar production and reduced attractiveness to bumblebees, with these trait shifts convergent across the four studied populations. We demonstrate the rapid evolution of a selfing syndrome in the four studied plant populations, associated with a weakening of the interactions with pollinators over the last three decades. This study demonstrates that plant mating systems can evolve rapidly in natural populations in the face of ongoing environmental changes. The rapid evolution towards a selfing syndrome may in turn further accelerate pollinator declines, in an eco-evolutionary feedback loop with broader implications to natural ecosystems. Lien pérenne : DOI : 10.1111/nph.19422 Permalink : https://biblio.cbnpmp.fr/index.php?lvl=notice_display&id=152237
in New Phytologist > (19 December 2023) . - 1-10Acoca-Pidolle, Samson, Gauthier, Perrine, Devresse, Louis, Deverge Merdrignac, Antoine, Pons, Virginie, Cheptou, Pierre-Olivier 2023 Ongoing convergent evolution of a selfing syndrome threatens plant–pollinator interactions. New Phytologist: 1-10.Documents numériques
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