Evolution of flower development during an adaptive radiation in Caiophora

The rare occurrence of a reversion to an ancestral state following adaptive radiations of pollination syndromes suggests that changes in the ancestral developmental programme of flowers are common in this scenario.

Schematic representation of the evolution of a morphological structure following or not following the ontogenetic scaling expectation.
Schematic representation of the evolution of a morphological structure following or not following the ontogenetic scaling expectation. More details in Strelin et al. (2016)

Strelin et al. provide evidence that the latter took place during the recent diversification into different pollination syndromes (bee, hummingbird, and rodent pollination) of Caiophora (Loasaceae subfam. Loasoideae) in the central Andes. They use geometric morphometrics techniques to show that derived (Caiophora) species have divergent ontogenetic patterns of floral development from those observed for basal bee-pollinated species.

Reference List

Marina M. Strelin, Santiago Benitez-Vieyra, Juan Fornoni, Christian Peter Klingenberg, Andrea A. Cocucci, 2016, 'Exploring the ontogenetic scaling hypothesis during the diversification of pollination syndromes inCaiophora(Loasaceae, subfam. Loasoideae)', Annals of Botany, vol. 117, no. 5, pp. 937-947 http://dx.doi.org/10.1093/aob/mcw035