Floral traits driving reproductive isolation of two co-flowering taxa that share vertebrate pollinators

Pollination by hummingbirds in Ipomoea marcellia (A) and by bats in I. aff. marcellia (B). (Photo credit: the authors)

Floral attributes evolve in response to frequent and efficient pollinators, which are potentially important drivers of floral diversification and reproductive isolation. In this context, in a new study published in AoB PLANTS, Queiroz et al. investigated pollination in two co-flowering Ipomoea taxa (I. marcellia and I. aff. marcellia) that share the same pollinators (bats and hummingbirds) and show similarities in floral traits, favouring the mixture of pollen and the loss of plant genetic material. They found that floral length differences between the plants enabled pollen deposition on different parts of the body of pollinators, reducing the mixture of pollen. In addition, differences in the opening times of the flowers could explain the more effective pollination by bats in one of the plants and by hummingbirds in the other. This trend towards pollinator specialization may favour the coexistence of these plants.


AoB PLANTS is an open-access, online journal that publishes peer-reviewed articles on all aspects of environmental and evolutionary biology. Published by Oxford University Press, AoB PLANTS provides a fast-track pathway for publishing high-quality research, where papers are available online to anyone, anywhere free of charge. Reasons to publish in AoB PLANTS include double-blind peer review of manuscripts, rapid processing time and low open-access charges.

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