Herbivory as an important selective force in the evolution of floral traits and pollinator shifts

Tania Jogesh*, Rick P. Overson, Robert A. Raguso, Krissa A. Skogen

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

9 Scopus citations

Abstract

Floral trait evolution is frequently attributed to pollinator-mediated selection but herbivores can play a key role in shaping plant reproductive biology. Here we examine the role of florivores in driving floral trait evolution and pollinator shifts in a recently radiated clade of flowering plants, Oenothera sect. Calylophus.We compare florivory by a specialist, internal feeder, Mompha, on closely related hawkmoth- and bee-pollinated species and document variation in damage based on floral traits within sites, species and among species. Our results show that flowers with longer floral tubes and decreased floral flare have increased Mompha damage. Bee-pollinated flowers, which have substantially smaller floral tubes, experience on average 13% less Mompha florivory than do hawkmoth-pollinated flowers. The positive association between tube length and Mompha damage is evident even within sites of some species, suggesting that Mompha can drive trait differentiation at microevolutionary scales. Given that there are at least two independent shifts from hawkmoth to bee pollination in this clade, florivore-mediated selection on floral traits may have played an important role in facilitatingmorphological changes associated with transitions fromhawkmoth to bee pollination.

Original languageEnglish (US)
Article numberplw088
JournalAoB PLANTS
Volume9
Issue number1
DOIs
StatePublished - Jan 1 2017

Keywords

  • Bee
  • Calylophus
  • Diurnal pollination
  • Florivore
  • Hawkmoth
  • Herbivore
  • Hyles
  • Mompha
  • Nocturnal pollination
  • Oenothera
  • Onagraceae
  • Pollinator shifts

ASJC Scopus subject areas

  • Plant Science

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