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The origin and diversification of the Entorrhizales: deep evolutionary roots but recent speciation with a phylogenetic and phenotypic split between associates of the Cyperaceae and Juncaceae
Univ Koblenz Landau, Inst Environm Sci, Ecosyst Anal, Fortstr 7, D-76829 Landau, Germany.
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Cell and Molecular Biology, Molecular Evolution. Uppsala University, Science for Life Laboratory, SciLifeLab. Univ Tubingen, Inst Evolut & Ecol, Plant Evolutionary Ecol, Morgenstelle 5, D-72076 Tubingen, Germany.ORCID iD: 0000-0002-4453-4173
Univ Tubingen, Inst Evolut & Ecol, Plant Evolutionary Ecol, Morgenstelle 5, D-72076 Tubingen, Germany.
Univ Tubingen, Inst Evolut & Ecol, Plant Evolutionary Ecol, Morgenstelle 5, D-72076 Tubingen, Germany.
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2019 (English)In: Organisms Diversity & Evolution, ISSN 1439-6092, E-ISSN 1618-1077, Vol. 19, no 1, p. 13-30Article in journal (Refereed) Published
Abstract [en]

Fungi belonging to the Entorrhizales (Entorrhizomycota) comprise biotrophic pathogens associated with roots of theCyperaceae and Juncaceae plant species. They are nearly globally distributed but rarely studied due to a hidden lifestyle without causing visible effects on host plants. Therefore, the evolutionary origin and phylogenetic relationships of the group are still poorly understood and it is not known whether species diversification was the result of co-evolution with their hosts or the result of host jumps. To infer hypotheses about the evolutionary history of the Entorrhizales, divergence times were estimated and plant-fungal tanglegrams calculated. Relaxed molecular clock analyses suggest that the Entorrhizomycota originated around the Neoproterozoic-Palaeozoic and diverged during the Late Cretaceous-Paleogene into the extant orders Entorrhizales and Talbotiomycetales. The split of the major lineages within the Entorrhizales took place in the Eocene, somewhat later than the divergence of the host families Cyperaceae and Juncaceae. Topology- and distance-based co-phylogenetic analyses of the fungi and their hosts revealed a large number of co-speciation and lineage sorting events in early fungal speciation, which resulted in a phylogenetic split corresponding to species infecting Cyperaceae or Juncaceae. Given that this split is congruent with spore differences, Entorrhiza s. str. is emended for species infecting hosts in the Cyperaceae, and a new genus Juncorrhiza is described for species restricted to hosts in the Juncaceae. Additionally, three new species are described: Entorrhiza fuirenae, Juncorrhiza maritima and J. oxycarpi.

Place, publisher, year, edition, pages
SPRINGER HEIDELBERG , 2019. Vol. 19, no 1, p. 13-30
Keywords [en]
Age estimation, Co-phylogeny, Cyperaceae, Entorrhiza, Entorrhizomycota, Fungi, Juncaceae
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-378364DOI: 10.1007/s13127-018-0384-4ISI: 000458462900002OAI: oai:DiVA.org:uu-378364DiVA, id: diva2:1293971
Funder
German Research Foundation (DFG), BA 75/3-1Available from: 2019-03-06 Created: 2019-03-06 Last updated: 2019-03-06Bibliographically approved

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