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Is the switch to an ectomycorrhizal state an evolutionary key innovation in mushroom-forming fungi? A case study in the Tricholomatineae (Agaricales).
Evolution. 2017 01; 71(1):51-65.E

Abstract

Although fungi are one of the most diverse groups of organisms, little is known about the processes that shape their high taxonomic diversity. This study focuses on evolution of ectomycorrhizal (ECM) mushroom-forming fungi, symbiotic associates of many trees and shrubs, in the suborder Tricholomatineae of the Agaricales. We used the BiSSE model and BAMM to test the hypothesis that the ECM habit represents an evolutionary key innovation that allowed the colonization of new niches followed by an increase in diversification rate. Ancestral state reconstruction (ASR) supports the ancestor of the Tricholomatineae as non-ECM. We detected two diversification rate increases in the genus Tricholoma and the Rhodopolioid clade of the genus Entoloma. However, no increases in diversification were detected in the four other ECM clades of Tricholomatineae. We suggest that diversification of Tricholoma was not only due to the evolution of the ECM lifestyle, but also to the expansion and dominance of its main hosts and ability to associate with a variety of hosts. Diversification in the Rhodopolioid clade could be due to the unique combination of spore morphology and ECM habit. The spore morphology may represent an exaptation that aided spore dispersal and colonization. This is the first study to investigate rate shifts across a phylogeny that contains both non-ECM and ECM lineages.

Authors+Show Affiliations

Department of Ecology and Evolutionary Biology, University of Tennessee, 569 Dabney Hall, Knoxville, Tennessee, 37996-1610. Current Address: Biology Department, Clark University, Worcester, Massachusetts, 01610.Department of Ecology and Evolutionary Biology, University of Tennessee, 569 Dabney Hall, Knoxville, Tennessee, 37996-1610.

Pub Type(s)

Journal Article
Research Support, U.S. Gov't, Non-P.H.S.
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

27767208

Citation

Sánchez-García, Marisol, and Patrick Brandon Matheny. "Is the Switch to an Ectomycorrhizal State an Evolutionary Key Innovation in Mushroom-forming Fungi? a Case Study in the Tricholomatineae (Agaricales)." Evolution; International Journal of Organic Evolution, vol. 71, no. 1, 2017, pp. 51-65.
Sánchez-García M, Matheny PB. Is the switch to an ectomycorrhizal state an evolutionary key innovation in mushroom-forming fungi? A case study in the Tricholomatineae (Agaricales). Evolution. 2017;71(1):51-65.
Sánchez-García, M., & Matheny, P. B. (2017). Is the switch to an ectomycorrhizal state an evolutionary key innovation in mushroom-forming fungi? A case study in the Tricholomatineae (Agaricales). Evolution; International Journal of Organic Evolution, 71(1), 51-65. https://doi.org/10.1111/evo.13099
Sánchez-García M, Matheny PB. Is the Switch to an Ectomycorrhizal State an Evolutionary Key Innovation in Mushroom-forming Fungi? a Case Study in the Tricholomatineae (Agaricales). Evolution. 2017;71(1):51-65. PubMed PMID: 27767208.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Is the switch to an ectomycorrhizal state an evolutionary key innovation in mushroom-forming fungi? A case study in the Tricholomatineae (Agaricales). AU - Sánchez-García,Marisol, AU - Matheny,Patrick Brandon, Y1 - 2016/11/11/ PY - 2016/01/04/received PY - 2016/10/05/revised PY - 2016/10/10/accepted PY - 2016/10/22/pubmed PY - 2017/9/26/medline PY - 2016/10/22/entrez KW - Basidiomycota KW - ecological opportunity KW - macroevolution KW - speciation and extinction SP - 51 EP - 65 JF - Evolution; international journal of organic evolution JO - Evolution VL - 71 IS - 1 N2 - Although fungi are one of the most diverse groups of organisms, little is known about the processes that shape their high taxonomic diversity. This study focuses on evolution of ectomycorrhizal (ECM) mushroom-forming fungi, symbiotic associates of many trees and shrubs, in the suborder Tricholomatineae of the Agaricales. We used the BiSSE model and BAMM to test the hypothesis that the ECM habit represents an evolutionary key innovation that allowed the colonization of new niches followed by an increase in diversification rate. Ancestral state reconstruction (ASR) supports the ancestor of the Tricholomatineae as non-ECM. We detected two diversification rate increases in the genus Tricholoma and the Rhodopolioid clade of the genus Entoloma. However, no increases in diversification were detected in the four other ECM clades of Tricholomatineae. We suggest that diversification of Tricholoma was not only due to the evolution of the ECM lifestyle, but also to the expansion and dominance of its main hosts and ability to associate with a variety of hosts. Diversification in the Rhodopolioid clade could be due to the unique combination of spore morphology and ECM habit. The spore morphology may represent an exaptation that aided spore dispersal and colonization. This is the first study to investigate rate shifts across a phylogeny that contains both non-ECM and ECM lineages. SN - 1558-5646 UR - https://www.unboundmedicine.com/medline/citation/27767208/Is_the_switch_to_an_ectomycorrhizal_state_an_evolutionary_key_innovation_in_mushroom_forming_fungi_A_case_study_in_the_Tricholomatineae__Agaricales__ L2 - https://doi.org/10.1111/evo.13099 DB - PRIME DP - Unbound Medicine ER -