On the origin of giant seeds the macroevolution of the double coconut (Lodoicea maldivica) and its relatives (Borasseae, Arecaceae)

On the origin of giant seeds : the macroevolution of the double coconut (Lodoicea maldivica) and its relatives (Borasseae, Arecaceae)

© 2020 The Authors New Phytologist © 2020 New Phytologist Trust.

Bibliographische Detailangaben
Veröffentlicht in:The New phytologist. - 1979. - 228(2020), 3 vom: 30. Nov., Seite 1134-1148
1. Verfasser: Bellot, Sidonie (VerfasserIn)
Weitere Verfasser: Bayton, Ross P, Couvreur, Thomas L P, Dodsworth, Steven, Eiserhardt, Wolf L, Guignard, Maïté S, Pritchard, Hugh W, Roberts, Lucy, Toorop, Peter E, Baker, William J
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2020
Zugriff auf das übergeordnete Werk:The New phytologist
Schlagworte:Journal Article Research Support, Non-U.S. Gov't Arecaceae Coryphoideae biogeography coco de mer megafauna phylogenetics seed dispersal seed size
Beschreibung
Zusammenfassung:© 2020 The Authors New Phytologist © 2020 New Phytologist Trust.
Seed size shapes plant evolution and ecosystems, and may be driven by plant size and architecture, dispersers, habitat and insularity. How these factors influence the evolution of giant seeds is unclear, as are the rate of evolution and the biogeographical consequences of giant seeds. We generated DNA and seed size data for the palm tribe Borasseae (Arecaceae) and its relatives, which show a wide diversity in seed size and include the double coconut (Lodoicea maldivica), the largest seed in the world. We inferred their phylogeny, dispersal history and rates of change in seed size, and evaluated the possible influence of plant size, inflorescence branching, habitat and insularity on these changes. Large seeds were involved in 10 oceanic dispersals. Following theoretical predictions, we found that: taller plants with fewer-branched inflorescences produced larger seeds; seed size tended to evolve faster on islands (except Madagascar); and seeds of shade-loving Borasseae tended to be larger. Plant size and inflorescence branching may constrain seed size in Borasseae and their relatives. The possible roles of insularity, habitat and dispersers are difficult to disentangle. Evolutionary contingencies better explain the gigantism of the double coconut than unusually high rates of seed size increase
Beschreibung:Date Completed 14.05.2021
Date Revised 03.08.2024
published: Print-Electronic
Citation Status MEDLINE
ISSN:1469-8137
DOI:10.1111/nph.16750