Different rates of defense evolution and niche preferences in clonal and nonclonal milkweeds (Asclepias spp.).

Détails

ID Serval
serval:BIB_CE40C3E3B743
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Different rates of defense evolution and niche preferences in clonal and nonclonal milkweeds (Asclepias spp.).
Périodique
New Phytologist
Auteur(s)
Pellissier L., Litsios G., Fishbein M., Salamin N., Agrawal A.A., Rasmann S.
ISSN
1469-8137 (Electronic)
ISSN-L
0028-646X
Statut éditorial
Publié
Date de publication
2016
Volume
209
Numéro
3
Pages
1230-1239
Langue
anglais
Résumé
Given the dual role of many plant traits to tolerate both herbivore attack and abiotic stress, the climatic niche of a species should be integrated into the study of plant defense strategies. Here we investigate the impact of plant reproductive strategy and components of species' climatic niche on the rate of chemical defense evolution in the milkweeds using a common garden experiment of 49 species. We found that across Asclepias species, clonal reproduction repeatedly evolved in lower temperature conditions, in species generally producing low concentrations of a toxic defense (cardenolides). Additionally, we found that rates of cardenolide evolution were lower for clonal than for nonclonal species. We thus conclude that because the clonal strategy is based on survival, long generation times, and is associated with tolerance of herbivory, it may be an alternative to toxicity in colder ecosystems. Taken together, these results indicate that the rate of chemical defense evolution is influenced by the intersection of life-history strategy and climatic niches into which plants radiate.
Mots-clé
cardenolides, climatic niche, clonality, resistance, tolerance, trait evolution
Pubmed
Web of science
Création de la notice
13/05/2016 8:46
Dernière modification de la notice
03/03/2018 21:31
Données d'usage