Lichen speciation is sparked by a substrate requirement shift and reproduction mode differentiation.

Autor: Kantelinen A; Botany Unit, Finnish Museum of Natural History, University of Helsinki, P.O. Box 7, 00014, Helsinki, Finland. annina.kantelinen@helsinki.fi., Printzen C; Senckenberg Forschungsinstitut und Naturmuseum Frankfurt, Senckenberganlage 25, 60325, Frankfurt am Main, Germany., Poczai P; Botany Unit, Finnish Museum of Natural History, University of Helsinki, P.O. Box 7, 00014, Helsinki, Finland.; Museomics Research Group, Viikki Plant Science Centre (ViPS), University of Helsinki, PO Box 65, 00014, Helsinki, Finland., Myllys L; Botany Unit, Finnish Museum of Natural History, University of Helsinki, P.O. Box 7, 00014, Helsinki, Finland.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2022 Jun 30; Vol. 12 (1), pp. 11048. Date of Electronic Publication: 2022 Jun 30.
DOI: 10.1038/s41598-022-14970-9
Abstrakt: We show that obligate lignicoles in lichenized Micarea are predominately asexual whereas most facultative lignicoles reproduce sexually. Our phylogenetic analyses (ITS, mtSSU, Mcm7) together with ancestral state reconstruction show that the shift in reproduction mode has evolved independently several times within the group and that facultative and obligate lignicoles are sister species. The analyses support the assumption that the ancestor of these species was a facultative lignicole. We hypothezise that a shift in substrate requirement from bark to wood leads to differentiation in reproduction mode and becomes a driver of speciation. This is the first example of lichenized fungi where reproduction mode is connected to substrate requirement. This is also the first example where such an association is demonstrated to spark lichen speciation. Our main hypothesis is that obligate species on dead wood need to colonize new suitable substrata relatively fast and asexual reproduction is more effective a strategy for successful colonization.
(© 2022. The Author(s).)
Databáze: MEDLINE
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