Angiosperm flowers reached their highest morphological diversity early in their evolutionary history

Autor(en)
Andrea M. López-Martínez, Susana Magallón, Anna Maria Louise von Balthazar-Schönenberger, Jürg Schönenberger, Hervé Sauquet, Marion Chartier
Abstrakt

Flowers are the complex and highly diverse reproductive structures of angiosperms. Because of their role in sexual reproduction, the evolution of flowers is tightly linked to angiosperm speciation and diversification. Accordingly, the quantification of floral morphological diversity (disparity) among angiosperm subgroups and through time may give important insights into the evolutionary history of angiosperms as a whole. Based on a comprehensive dataset focusing on 30 characters describing floral structure across angiosperms, we used 1201 extant and 121 fossil flowers to measure floral disparity and explore patterns of floral evolution through time and across lineages. We found that angiosperms reached their highest floral disparity in the Early Cretaceous. However, decreasing disparity toward the present likely has not precluded the innovation of other complex traits at other morphological levels, which likely played a key role in the outstanding angiosperm species richness. Angiosperms occupy specific regions of the theoretical morphospace, indicating that only a portion of the possible floral trait combinations is observed in nature. The ANA grade, the magnoliids, and the early-eudicot grade occupy large areas of the morphospace (higher disparity), whereas nested groups occupy narrower regions (lower disparity).

Organisation(en)
Department für Botanik und Biodiversitätsforschung
Externe Organisation(en)
Universidad Nacional Autonoma de Mexico, University of New South Wales, Royal Botanic Gardens and Domain Trust Sydney
Journal
New Phytologist
Band
241
Seiten
1348-1360
Anzahl der Seiten
13
ISSN
0028-646X
DOI
https://doi.org/10.1111/nph.19389
Publikationsdatum
11-2023
Peer-reviewed
Ja
ÖFOS 2012
106008 Botanik, 106012 Evolutionsforschung, 106042 Systematische Botanik
Schlagwörter
ASJC Scopus Sachgebiete
Physiology, Plant Science
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/angiosperm-flowers-reached-their-highest-morphological-diversity-early-in-their-evolutionary-history(3377000a-7147-4f0f-8826-00d83d6d13f6).html