Université de Neuchâtel

Evolutionary conflicts and ecological constraints at reproduction in the dioecious plant Silene latifolia

Burkhardt, Anne ; Bernasconi, Giorgina (Dir.) ; Benrey, Betty (Codir.)

Thèse de doctorat : Université de Neuchâtel, 2009.

Flowering plants show an astonishing diversity of flower shapes and colours. Among plant reproductive systems, dioecy is of particular interest because each sex can be subjected to independent selection pressures that may lead to the evolution of different floral traits in the two sexes (sexual dimorphism; chapter 1). On the one hand, many studies have confirmed the role of pollinators as...

Université de Neuchâtel

Benefits and costs to pollinating, seed-eating insects: the effect of flower size and fruit abortion on larval performance

Burkhardt, Anne ; Delph, Lynda F. ; Bernasconi, Giorgina

In: Oecologia, 2009, vol. 161, no. 1, p. 87-98

Plant–pollinator interactions are well-known examples of mutualism, but are not free of antagonism. Antagonistic interactions and defenses or counter-defenses are expected particularly in nursery pollination. In these systems, adult insects, while pollinating, lay their eggs in flowers, and juveniles consume the seeds from one or several fruits, thereby substantially reducing plant fitness. The...