Abstract Detail

Mycological Section

Spirin, Viacheslav [1], Vlasák, Josef [2], Miettinen, Otto [1].

Speciation in the genus Antrodia (Polyporales, Basidiomycota): geographic isolation and host adaptation.

The polypore genus Antrodia in strict sense includes about 10 species (the so called A. heteromorpha and A. macra groups – Spirin et al. 2013a) displaying subtle morphological differences but easily recognizable due to their host demands and geographic distribution. Of them, only A. heteromorpha is a ubiquitous and polyphagous species widely distributed in the northern hemisphere, while other species are mostly restricted to deciduous trees and limited to certain geographic areas. Similar tendency has been detected in the A. crassa group where the ecologically most flexible species, A. cretacea, nom. prov. (Runnel et al. 2014, unpublished data), is distributed in the Circumboreal Region and inhabits many gymnosperm hosts, while 9 other species are characterized by narrower distribution areas and, in many cases, specific substrates. The Antrodia malicola group contains two species, A. malicola s.str. and A. minuta, showing clear ITS differences but hardly distinguishable morphologically. Nevertheless, ecological requirements of these species are certainly different. A. malicola is a termophilic species widely distributed in subtropical areas and warm habitats of temperate zone, growing on many angiosperm hosts and rarely also on gymnosperms. In turn, A. minuta is the European species collected primarily in hemiboreal forests, almost exclusively on aspen (Populus tremula). Following the same idea of geographic or host-adaptation driven speciation, we studied the species diversity of the A. serialis group, analyzing both DNA data and microscopic characters of specimens collected in special ecological niches. Our preliminary data reveal more species in this group than stated earlier (Spirin et al. 2013b, Vlasák et al. 2014), in particular, indicating 3 undescribed species from North America and East Asia, as well as probable infraspecific hybridization among some species. The core species of this group, A. serialis, is circumboreal, having the largest set of hosts, but other species are restricted to certain substrates (A. leucaena, A. serialiformis) or/and geographic areas (A. infirma, A. kmetii, A. primaeva).

1 - University of Helsinki, Botany Unit (Mycology), Finnish Museum of Natural History, Unioninkatu 44, Helsinki, 00100, Finland
2 - Academy of Sciences, Biological Centre, Branišovská 31, České Budějovice, CZ-37005, Czech Republic

Keywords:
Fungal phylogeny
brown-rot polypores
speciation
Host preference.

Presentation Type: Poster:Posters for Sections
Session: P
Location: Hall D/The Shaw Conference Centre
Date: Monday, July 27th, 2015
Time: 5:30 PM
Number: PMY003
Abstract ID:584
Candidate for Awards:None