sdu faculty of forestry journal special edition 2009 - Orman Fakültesi

SDU Faculty of Forestry Journal
Serial: A, Number: Special Issue, Year: 2009, ISSN: 1302-7085, Page: 246-251
CONTRIBUTIONS TO THE PHYLOGENY OF EUROPEAN
Porodaedalea SPECIES (BASIDIOMYCETES, HYMENOCHAETALES)
Michal TOMŠOVSKÝ 1 , Libor JANKOVSKÝ 1*
1 Faculty of Forestry and Wood Technology, Mendel University of Agriculture and Forestry in
Brno, Zemědělská 3, CZ – 613 00 Brno, Czech Republic; e-mails: tomsovsk@mendelu.cz,
ABSTRACT
*jankov@mendelu.cz.
The genus Porodaedalea is a taxonomically difficult complex of morphologically
similar species causing white pocket rot of living conifers. The evolutionary relationships
of European species were examined using sequences of the internal transcribed spacer
(ITS) region of the nuclear ribosomal DNA and of translation elongation factor 1 alpha
(tefa). Our results confirm the occurrence of Porodaedalea chrysoloma, P. pini and P.
laricis in Europe. P. laricis is newly reported in Fennoscandia on Picea and in the Central
European mountains (Alps, High Tatras, and Bohemian Forest) on Larix and Pinus spp.
These specimens had been previously identified as Porodaedalea chrysoloma or Phellinus
vorax (an invalidly described species). Although frequently confused, P. chrysoloma and P.
laricis can be distinguished on the basis of pore morphology. We also report our finding of
P. pini on Larix. In general, the tefa sequences are more variable than the ITS sequences
and reveal the remarkable affinity of some Scandinavian and Central European specimens
to those from Central Asia.
1. INTRODUCTION
The genus Porodaedalea includes parasites on conifers, causing white pocket
rot. The genus belongs to one of the most taxonomically difficult groups of
hymenochaetoid pore fungi. The so-called Phellinus pini group was raised to the
generic level by Fiasson and Niemelä (1984). The basidiocarps are perennial,
effused-reflexed to pileate, solitary to imbricate, and corky to woody hardness. The
colour is rust brown to dark grey on the upper surface, while the poroid surface is
ochre brown or rust brown to umbre brown, and more or less shining. The pores
are circular to angular, tending to split and becoming irregular to daedaleoid and
labyrinthine. Setae are commonly present in the hymenium. In some areas the
species are reported to be economically important pathogens of conifers
(Lannenpaa et al., 2008; Černý, 1989; Lehtijärvi et al., 2007). The genus has
previously been treated as part of a broadly conceived genus Phellinus s.l.
(Ryvarden and Gilbertson, 1994), but molecular studies have revealed the
heterogeneity of that genus (Wagner and Fischer, 2002). Therefore smaller, more
homogeneous genera are currently accepted.
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