RRC ID 79424
Author Hirotoshi Sato
Title The evolution of ectomycorrhizal symbiosis in the Late Cretaceous is a key driver of explosive diversification in Agaricomycetes
Journal New Phytologist
Abstract Summary Ectomycorrhizal (EcM) symbiosis, a ubiquitous plant–fungus interaction in forests, evolved in parallel in fungi. Why the evolution of EcM fungi did not necessarily increase ecological opportunities for explosive diversification remains unclear. This study aimed to reveal the driving mechanism of the evolutionary diversification in the fungal class Agaricomycetes, specifically by testing whether the evolution of EcM symbiosis in the Late Cretaceous increased ecological opportunities. The historical character transitions of trophic state and fruitbody form were estimated based on phylogenies inferred from fragments of 89 single‐copy genes. Moreover, five analyses were used to estimate the net diversification rates (speciation rate minus extinction rate). The results indicate that the unidirectional evolution of EcM symbiosis occurred 27 times, ranging in date from the Early Triassic to the Early Paleogene. The increased diversification rates appeared to occur intensively at the stem of EcM fungal clades diverging in the Late Cretaceous, coinciding with the rapid diversification of EcM angiosperms. By contrast, the evolution of fruitbody form was not strongly linked with the increased diversification rates. These findings suggest that the evolution of EcM symbiosis in the Late Cretaceous, supposedly with coevolving EcM angiosperms, was the key drive of the explosive diversification in Agaricomycetes.
Volume 241
Pages 444-460
Published 2024-1-1
DOI 10.1111/nph.19055
PMID 37292019
MeSH Basidiomycota* / genetics Biological Evolution Mycorrhizae* / genetics Phylogeny Symbiosis
IF 8.512
Fungus/Mushroom TUFC100634 Lyophyllum decastes TUFC100745 Hyphodontia zhixiangii TUFC101398 Gloeocystidiellum convolvens TUFC100861 Odontia crinalis