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

Autor: López-Martínez AM; Posgrado en Ciencias Biológicas, Instituto de Biología, Universidad Nacional Autónoma de México, 3er Circuito de Ciudad Universitaria, Coyoacán, Ciudad de México, 04510, Mexico.; Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, 3er Circuito de Ciudad Universitaria, Coyoacán, Ciudad de México, 04510, Mexico., Magallón S; Departamento de Botánica, Instituto de Biología, Universidad Nacional Autónoma de México, 3er Circuito de Ciudad Universitaria, Coyoacán, Ciudad de México, 04510, Mexico., von Balthazar M; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, A-1030, Austria., Schönenberger J; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, A-1030, Austria., Sauquet H; National Herbarium of New South Wales (NSW), Royal Botanic Gardens and Domain Trust, Sydney, NSW, 2000, Australia.; Evolution and Ecology Research Centre, School of Biological, Earth and Environmental Sciences, University of New South Wales, Biological Sciences North (D26), Sydney, NSW, 2052, Australia., Chartier M; Department of Botany and Biodiversity Research, University of Vienna, Rennweg 14, Vienna, A-1030, Austria.
Jazyk: angličtina
Zdroj: The New phytologist [New Phytol] 2024 Feb; Vol. 241 (3), pp. 1348-1360. Date of Electronic Publication: 2023 Nov 29.
DOI: 10.1111/nph.19389
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).
(© 2023 The Authors. New Phytologist © 2023 New Phytologist Foundation.)
Databáze: MEDLINE
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