Substrate switches, phenotypic innovations and allopatricspeciation formed taxonomic diversity within the lichengenus Blastenia

0532585 - BÚ 2021 RIV CN eng J - Journal Article
Vondrák, Jan - Frolov, I. - Košnar, J. - Arup, U. - Veselská, Tereza - Halici, G. - Malíček, Jiří - Søchting, U.
Substrate switches, phenotypic innovations and allopatricspeciation formed taxonomic diversity within the lichengenus Blastenia.
Journal of Systematics and Evolution. Roč. 58, č. 3 (2020), s. 295-330. ISSN 1674-4918. E-ISSN 1759-6831
Institutional support: RVO:67985939 ; RVO:61388971
Keywords : anthraquinones * genome size * long-distance dispersal
OECD category: Plant sciences, botany; Microbiology (MBU-M)
Impact factor: 4.098, year: 2020
Method of publishing: Limited access

Blasteniais a widely distributed lichen genus in Teloschistaceae. We reconstructed its phylogeny in order totest species delimitation and tofind evolutionary drivers forming recent Blastenia diversity. The origin of Blastenia is dated to the early Tertiary period, but later diversification events are distinctly younger. We recognized 24 species (plus 2 subspecies) within 6 infrageneric groups. Each species strongly prefers a single type of substrate (17 species occur onorganic substrates, 7 on siliceous rock), and most infrageneric groups also show a clear substrate preference. Allinfrageneric groups tend to have the Mediterranean and Macaronesian distribution, but some epiphytic species havemuch larger geographic ranges and some evolved after a long‐distance dispersal outsidethe region. Chlorinated andnonchlorinated anthraquinone chemosyndromes co‐occur in apothecia of most species, but the chemotype has beensecondarily reduced in some lineages. One infrageneric group has a marked reduction in apothecial size, associatedwith a substrate shift to twigs. Only seven species have vegetative diaspores, they also produce apothecia but havesmaller ascospores. Genome sizes (22‒35 Mb inBlastenia)aresignificantly higher in epilithic species. Within‐speciesgenetic variation is low in widely distributed species but high in some epilithic species with small geographical ranges. New taxa are B. afroalpina, B. anatolica,B. caucasica, B. gennargentuae, B. herbidella subsp.acidophila, B. lauri, B. monticola, B. palmae, B. psychrophila, B. purpurea, B. relicta, B. remota, B. xerothermica, and B. xerothermica subsp. macaronesica. New combinations are B. festivellaand, B. subathallina, B. bothnamesand, B. catalinaeare lectotypified.
Permanent Link: http://hdl.handle.net/11104/0311180