IMA Fungus 10(1): e33852, doi: 10.1186/s43008-019-0003-9

Phylogenetic study documents different speciation mechanisms within the Russula globispora lineage in boreal and arctic environments of the Northern Hemisphere

Miroslav Caboň^‡§, Guo-Jie Li^|, Malka Saba, Miroslav Kolarik^¶, Soňa Jančovičová^#, Abdul Nasir Khalid^¤, Pierre-Arthur Moreau^«, Donald H. Pfister^», Slavomir Adamcik^˄, Slavomír Adamčík^˅

‡ Plant Science and Biodiversity Centre, Slovak Academy of Sciences, Bratislava, Slovakia§ University of Florida, Gainesville, United States of America| Institute of Microbiology, Chinese Academy of Sciences, State Key Laboratory of Mycology, Beijing, China¶ Institute of Microbiology of the CAS, v. v. i., Prague, Czech Republic# Comenius University in Bratislava, Department of Botany, Faculty of Natural Sciences, Bratislava, Slovakia¤ University of the Punjab, Lahore, Pakistan« Laboratoire IMPECS, Fac. Pharma. Lille, Université de Lille, Lille, France» Harvard University, Cambridge, United States of America˄ Slovak Academy of Sciences, Bratislava, Slovakia˅ Slovak Academy of Sciences, Institute of Botany, Plant Science and Biodiversity Center, Bratislava, Slovakia

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Citation: Caboň M, Li G-J, Saba M, Kolarik M, Jančovičová S, Khalid AN, Moreau P-A, Pfister DH, Adamcik S, Adamčík S (2019) Phylogenetic study documents different speciation mechanisms within the Russula globispora lineage in boreal and arctic environments of the Northern Hemisphere. IMA Fungus 10(1): e33852. https://doi.org/10.1186/s43008-019-0003-9

Abstract

The Russula globispora lineage is a morphologically and phylogenetically well-defined group of ectomycorrhizal fungi occurring in various climatic areas. In this study we performed a multi-locus phylogenetic study based on collections from boreal, alpine and arctic habitats of Europe and Western North America, subalpine collections from the southeast Himalayas and collections from subtropical coniferous forests of Pakistan. European and North American collections are nearly identical and probably represent a single species named R. dryadicola distributed from the Alps to the Rocky Mountains. Collections from the southeast Himalayas belong to two distinct species: R. abbottabadensis sp. nov. from subtropical monodominant forests of Pinus roxburghii and R. tengii sp. nov. from subalpine mixed forests of Abies and Betula. The results suggest that speciation in this group is driven by a climate disjunction and adaptation rather than a host switch and geographical distance.

Keywords

Ectomycorrhizal fungi, Biogeography, Climate, Disjunction, Evolutionary drivers, New taxa