Tags

Type your tag names separated by a space and hit enter

Into and out of the tropics: global diversification patterns in a hyperdiverse clade of ectomycorrhizal fungi.
Mol Ecol 2016; 25(2):630-47ME

Abstract

Ectomycorrhizal (ECM) fungi, symbiotic mutualists of many dominant tree and shrub species, exhibit a biogeographic pattern counter to the established latitudinal diversity gradient of most macroflora and fauna. However, an evolutionary basis for this pattern has not been explicitly tested in a diverse lineage. In this study, we reconstructed a mega-phylogeny of a cosmopolitan and hyperdiverse genus of ECM fungi, Russula, sampling from annotated collections and utilizing publically available sequences deposited in GenBank. Metadata from molecular operational taxonomic unit cluster sets were examined to infer the distribution and plant association of the genus. This allowed us to test for differences in patterns of diversification between tropical and extratropical taxa, as well as how their associations with different plant lineages may be a driver of diversification. Results show that Russula is most species-rich at temperate latitudes and ancestral state reconstruction shows that the genus initially diversified in temperate areas. Migration into and out of the tropics characterizes the early evolution of the genus, and these transitions have been frequent since this time. We propose the 'generalized diversification rate' hypothesis to explain the reversed latitudinal diversity gradient pattern in Russula as we detect a higher net diversification rate in extratropical lineages. Patterns of diversification with plant associates support host switching and host expansion as driving diversification, with a higher diversification rate in lineages associated with Pinaceae and frequent transitions to association with angiosperms.

Authors+Show Affiliations

Department of Ecology and Evolutionary Biology, University of Tennessee, 332 Hesler Biology Building, Knoxville, TN, 37996-1610, USA.Department of Organismal Biology, Uppsala University, Evolutionsbiologiskt Centrum, Norbyv. 18D, 75236, Uppsala, Sweden.Department of Biology, Gent University, K.L. Ledeganckstraat 35, 9000, Gent, Belgium.Department of Ecology and Evolutionary Biology, University of Tennessee, 332 Hesler Biology Building, Knoxville, TN, 37996-1610, USA.Department of Ecology and Evolutionary Biology, University of Tennessee, 332 Hesler Biology Building, Knoxville, TN, 37996-1610, USA.

Pub Type(s)

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

Language

eng

PubMed ID

26642189

Citation

Looney, Brian P., et al. "Into and Out of the Tropics: Global Diversification Patterns in a Hyperdiverse Clade of Ectomycorrhizal Fungi." Molecular Ecology, vol. 25, no. 2, 2016, pp. 630-47.
Looney BP, Ryberg M, Hampe F, et al. Into and out of the tropics: global diversification patterns in a hyperdiverse clade of ectomycorrhizal fungi. Mol Ecol. 2016;25(2):630-47.
Looney, B. P., Ryberg, M., Hampe, F., Sánchez-García, M., & Matheny, P. B. (2016). Into and out of the tropics: global diversification patterns in a hyperdiverse clade of ectomycorrhizal fungi. Molecular Ecology, 25(2), pp. 630-47. doi:10.1111/mec.13506.
Looney BP, et al. Into and Out of the Tropics: Global Diversification Patterns in a Hyperdiverse Clade of Ectomycorrhizal Fungi. Mol Ecol. 2016;25(2):630-47. PubMed PMID: 26642189.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Into and out of the tropics: global diversification patterns in a hyperdiverse clade of ectomycorrhizal fungi. AU - Looney,Brian P, AU - Ryberg,Martin, AU - Hampe,Felix, AU - Sánchez-García,Marisol, AU - Matheny,P Brandon, Y1 - 2016/01/19/ PY - 2015/07/28/received PY - 2015/11/10/revised PY - 2015/11/22/accepted PY - 2015/12/8/entrez PY - 2015/12/8/pubmed PY - 2016/8/9/medline KW - Russulaceae KW - fungi KW - latitudinal diversity gradient KW - phylogeography KW - phyloinformatics SP - 630 EP - 47 JF - Molecular ecology JO - Mol. Ecol. VL - 25 IS - 2 N2 - Ectomycorrhizal (ECM) fungi, symbiotic mutualists of many dominant tree and shrub species, exhibit a biogeographic pattern counter to the established latitudinal diversity gradient of most macroflora and fauna. However, an evolutionary basis for this pattern has not been explicitly tested in a diverse lineage. In this study, we reconstructed a mega-phylogeny of a cosmopolitan and hyperdiverse genus of ECM fungi, Russula, sampling from annotated collections and utilizing publically available sequences deposited in GenBank. Metadata from molecular operational taxonomic unit cluster sets were examined to infer the distribution and plant association of the genus. This allowed us to test for differences in patterns of diversification between tropical and extratropical taxa, as well as how their associations with different plant lineages may be a driver of diversification. Results show that Russula is most species-rich at temperate latitudes and ancestral state reconstruction shows that the genus initially diversified in temperate areas. Migration into and out of the tropics characterizes the early evolution of the genus, and these transitions have been frequent since this time. We propose the 'generalized diversification rate' hypothesis to explain the reversed latitudinal diversity gradient pattern in Russula as we detect a higher net diversification rate in extratropical lineages. Patterns of diversification with plant associates support host switching and host expansion as driving diversification, with a higher diversification rate in lineages associated with Pinaceae and frequent transitions to association with angiosperms. SN - 1365-294X UR - https://www.unboundmedicine.com/medline/citation/26642189/Into_and_out_of_the_tropics:_global_diversification_patterns_in_a_hyperdiverse_clade_of_ectomycorrhizal_fungi L2 - https://doi.org/10.1111/mec.13506 DB - PRIME DP - Unbound Medicine ER -