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Host shifts enhance diversification of ectomycorrhizal fungi: diversification rate analysis of the ectomycorrhizal fungal genera Strobilomyces and Afroboletus with an 80-gene phylogeny.
New Phytol. 2017 Apr; 214(1):443-454.NP

Abstract

Mutualisms with new host lineages can provide symbionts with novel ecological opportunities to expand their geographical distribution, thereby leading to evolutionary diversification. Because ectomycorrhizal (ECM) fungi provide ideal opportunities to test the relationship between host shifts and diversification, we tested whether mutualism with new host lineages could increase the diversification rates of ECM fungi. Using a Bayesian tree inferred from 23 027-base nucleotide sequences of 80 single-copy genes, we tested whether the diversification rate had changed through host-shift events in the monophyletic clade containing the ECM fungal genera Strobilomyces and Afroboletus. The results indicated that these fungi were initially associated with Caesalpinioideae/Monotoideae in Africa, acquired associations with Dipterocarpoideae in tropical Asia, and then switched to Fagaceae/Pinaceae and Nothofagaceae/Eucalyptus. Fungal lineages associated with Fagaceae/Pinaceae were inferred to have approximately four-fold and two-fold greater diversification rates than those associated with Caesalpinioideae/Monotoideae and Dipterocarpoideae or Nothofagaceae/Eucalyptus, respectively. Moreover, the diversification rate shift was inferred to follow the host shift to Fagaceae/Pinaceae. Our study suggests that host-shift events, particularly those occurring with respect to Fagaceae/Pinaceae, can provide ecological opportunities for the rapid diversification of Strobilomyces-Afroboletus. Although further studies are needed for generalization, we propose a possible diversification scenario of ECM fungi.

Authors+Show Affiliations

Center for Ecological Research, Kyoto University, 509-3, 2-chome, Hirano, Otsu, Shiga, 520-2113, Japan. Department of Environmental Solution Technology, Facility of Science & Technology, Ryukoku University, Seta-Oe, Otsu, 520-2194, Shiga, Japan.National Research Institute of Fisheries Science, Japan Fisheries Research and Education Agency, 2-12-4, Fuku-ura, Kanazawa-ku, Yokohama, Kanagawa, 236-8648, Japan.Graduate School of Human and Environmental Studies, Kyoto University, Yoshida-nihonmatsu-cho, Sakyoku Kyoto, 606-8501, Japan.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

27918625

Citation

Sato, Hirotoshi, et al. "Host Shifts Enhance Diversification of Ectomycorrhizal Fungi: Diversification Rate Analysis of the Ectomycorrhizal Fungal Genera Strobilomyces and Afroboletus With an 80-gene Phylogeny." The New Phytologist, vol. 214, no. 1, 2017, pp. 443-454.
Sato H, Tanabe AS, Toju H. Host shifts enhance diversification of ectomycorrhizal fungi: diversification rate analysis of the ectomycorrhizal fungal genera Strobilomyces and Afroboletus with an 80-gene phylogeny. New Phytol. 2017;214(1):443-454.
Sato, H., Tanabe, A. S., & Toju, H. (2017). Host shifts enhance diversification of ectomycorrhizal fungi: diversification rate analysis of the ectomycorrhizal fungal genera Strobilomyces and Afroboletus with an 80-gene phylogeny. The New Phytologist, 214(1), 443-454. https://doi.org/10.1111/nph.14368
Sato H, Tanabe AS, Toju H. Host Shifts Enhance Diversification of Ectomycorrhizal Fungi: Diversification Rate Analysis of the Ectomycorrhizal Fungal Genera Strobilomyces and Afroboletus With an 80-gene Phylogeny. New Phytol. 2017;214(1):443-454. PubMed PMID: 27918625.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Host shifts enhance diversification of ectomycorrhizal fungi: diversification rate analysis of the ectomycorrhizal fungal genera Strobilomyces and Afroboletus with an 80-gene phylogeny. AU - Sato,Hirotoshi, AU - Tanabe,Akifumi S, AU - Toju,Hirokazu, Y1 - 2016/12/05/ PY - 2016/08/11/received PY - 2016/11/01/accepted PY - 2016/12/6/pubmed PY - 2018/2/17/medline PY - 2016/12/6/entrez KW - Illumina MiSeq KW - biogeography KW - coevolution KW - mutualism KW - radiation KW - speciation KW - species interaction SP - 443 EP - 454 JF - The New phytologist JO - New Phytol. VL - 214 IS - 1 N2 - Mutualisms with new host lineages can provide symbionts with novel ecological opportunities to expand their geographical distribution, thereby leading to evolutionary diversification. Because ectomycorrhizal (ECM) fungi provide ideal opportunities to test the relationship between host shifts and diversification, we tested whether mutualism with new host lineages could increase the diversification rates of ECM fungi. Using a Bayesian tree inferred from 23 027-base nucleotide sequences of 80 single-copy genes, we tested whether the diversification rate had changed through host-shift events in the monophyletic clade containing the ECM fungal genera Strobilomyces and Afroboletus. The results indicated that these fungi were initially associated with Caesalpinioideae/Monotoideae in Africa, acquired associations with Dipterocarpoideae in tropical Asia, and then switched to Fagaceae/Pinaceae and Nothofagaceae/Eucalyptus. Fungal lineages associated with Fagaceae/Pinaceae were inferred to have approximately four-fold and two-fold greater diversification rates than those associated with Caesalpinioideae/Monotoideae and Dipterocarpoideae or Nothofagaceae/Eucalyptus, respectively. Moreover, the diversification rate shift was inferred to follow the host shift to Fagaceae/Pinaceae. Our study suggests that host-shift events, particularly those occurring with respect to Fagaceae/Pinaceae, can provide ecological opportunities for the rapid diversification of Strobilomyces-Afroboletus. Although further studies are needed for generalization, we propose a possible diversification scenario of ECM fungi. SN - 1469-8137 UR - https://www.unboundmedicine.com/medline/citation/27918625/Host_shifts_enhance_diversification_of_ectomycorrhizal_fungi:_diversification_rate_analysis_of_the_ectomycorrhizal_fungal_genera_Strobilomyces_and_Afroboletus_with_an_80_gene_phylogeny_ L2 - https://doi.org/10.1111/nph.14368 DB - PRIME DP - Unbound Medicine ER -