Modularity increases rate of floral evolution and adaptive success for functionally specialized pollination systems

Autor(en)
Agnes S. Dellinger, Silvia Artuso, Susanne Pamperl, Fabián A. Michelangeli, Darin S. Penneys, Diana M. Fernández-Fernández, Marcela Alvear, Frank Almeda, W. Scott Armbruster, Yannick Städler, Jürg Schönenberger
Abstrakt

Angiosperm flowers have diversified in adaptation to pollinators, but are also shaped by developmental and genetic histories. The relative importance of these factors in structuring floral diversity remains unknown. We assess the effects of development, function and evolutionary history by testing competing hypotheses on floral modularity and shape evolution in Merianieae (Melastomataceae). Merianieae are characterized by different pollinator selection regimes and a developmental constraint: tubular anthers adapted to specialized buzz-pollination. Our analyses of tomography-based 3-dimensional flower models show that pollinators selected for functional modules across developmental units and that patterns of floral modularity changed during pollinator shifts. Further, we show that modularity was crucial for Merianieae to overcome the constraint of their tubular anthers through increased rates of evolution in other flower parts. We conclude that modularity may be key to the adaptive success of functionally specialized pollination systems by making flowers flexible (evolvable) for adaptation to changing selection regimes.

Organisation(en)
Department für Botanik und Biodiversitätsforschung
Externe Organisation(en)
Paris-Lodron Universität Salzburg, New York Bot Garden, University of North Carolina at Wilmington, Inst Nacl Biodiversidad, Herbario Nacl QCNE, Secc Bot, Museo Ecuatoriano Ciencias Nat, California Academy of Sciences, University of Portsmouth
Journal
Communications Biology
Band
2
DOI
https://doi.org/10.1038/s42003-019-0697-7
Publikationsdatum
12-2019
Peer-reviewed
Ja
ÖFOS 2012
106008 Botanik, 106042 Systematische Botanik, 106012 Evolutionsforschung
Schlagwörter
Link zum Portal
https://ucris.univie.ac.at/portal/de/publications/modularity-increases-rate-of-floralevolution-and-adaptive-success-for-functionally-specialized-pollination-systems(b63a0d15-cf63-4e71-9063-4b1fb80ebd06).html