Convergent evolutionary patterns of heterostyly across angiosperms support the pollination-precision hypothesis

Autor(en)
Violeta Simón-Porcar, Marcial Escudero, Rocío Santos-Gally, Hervé Sauquet, Jürg Schönenberger, Steven D. Johnson, Juan Arroyo
Abstrakt

Since the insights by Charles Darwin, heterostyly, a floral polymorphism with morphs bearing stigmas and anthers at reciprocal heights, has become a model system for the study of natural selection. Based on his archetypal heterostylous flower, including regular symmetry, few stamens and a tube, Darwin hypothesised that heterostyly evolved to promote outcrossing through efficient pollen transfer between morphs involving different areas of a pollinator’s body, thus proposing his seminal pollination-precision hypothesis. Here we update the number of heterostylous and other style-length polymorphic taxa to 247 genera belonging to 34 families, notably expanding known cases by 20%. Using phylogenetic and comparative analyses across the angiosperms, we show numerous independent origins of style-length polymorphism associated with actinomorphic, tubular flowers with a low number of sex organs, stamens fused to the corolla, and pollination by long-tongued insects. These associations provide support for the Darwinian pollination-precision hypothesis as a basis for convergent evolution of heterostyly across angiosperms.

Organisation(en)
Department für Botanik und Biodiversitätsforschung
Externe Organisation(en)
Universidad de Sevilla, Universidad Nacional Autonoma de Mexico, National Herbarium of New South Wales, University of KwaZulu-Natal
Journal
Nature Communications
Band
15
Anzahl der Seiten
12
ISSN
2041-1723
DOI
https://doi.org/10.1038/s41467-024-45118-0
Publikationsdatum
02-2024
Peer-reviewed
Ja
ÖFOS 2012
106008 Botanik, 106012 Evolutionsforschung, 106042 Systematische Botanik
ASJC Scopus Sachgebiete
Physics and Astronomy(all), Chemistry(all), Biochemistry, Genetics and Molecular Biology(all)
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/convergent-evolutionary-patterns-of-heterostyly-across-angiosperms-support-the-pollinationprecision-hypothesis(6539b04c-c7c1-4365-b7b6-2487cea671ac).html