Article (Scientific journals)
The importance of pollen chemistry in evolutionary host shifts of bees
Vanderplanck, Maryse; Vereecken, Nicolas; Grumiau, Laurent et al.
2017In Scientific Reports, 7, p. 43058
Peer reviewed
 

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Abstract :
[en] Although bee-plant associations are generally maintained through speciation processes, host shifts have occurred during evolution. Understanding shifts between both phylogenetically and morphologically unrelated plants (i.e., host-saltation) is especially important since they could have been key processes in the origin and radiation of bees. Probably far from being a random process, such host-saltation might be driven by hidden constraints associated with plant traits. We selected two clades of oligolectic bees (i.e., Colletes succinctus group and Melitta leporina group) foraging on co-flowering but unrelated host-plants to test this hypothesis. We analyzed floral scent, floral color and chemical composition of pollen from host and non-host plants of these two clades. We did not find evidence for host-plant evolution in the Melitta leporina group driven by one of the assayed floral traits. On the contrary, hosts of the C. succinctus group display similar primary nutritive content of pollen (i.e., amino acids and sterols) but not similar floral scent or color, suggesting that shared pollen chemistry probably mediates saltation in this clade. Our study revealed that constraints shaping floral associations are diverse and clearly depend on species life-history traits, but evidence suggests that pollen chemistry may act as a major floral filter and guide evolutionary host-shifts.
Disciplines :
Biochemistry, biophysics & molecular biology
Zoology
Chemistry
Author, co-author :
Vanderplanck, Maryse ;  Université de Mons > Faculté des Sciences > Zoologie
Vereecken, Nicolas
Grumiau, Laurent
Esposito, Fabiana
Lognay, Georges
Wattiez, Ruddy  ;  Université de Mons > Faculté des Sciences > Service de Protéomie et Microbiologie
Michez, Denis  ;  Université de Mons > Faculté des Sciences > Zoologie
Language :
English
Title :
The importance of pollen chemistry in evolutionary host shifts of bees
Publication date :
19 January 2017
Journal title :
Scientific Reports
Publisher :
Nature Publishing Group, London, United Kingdom
Volume :
7
Pages :
43058
Peer reviewed :
Peer reviewed
Research unit :
S869 - Zoologie
Research institute :
R100 - Institut des Biosciences
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