Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme II: SYSTEMATICS, PHYLOGENY AND EVOLUTION Posters
To elucidate phylogenetic relationships of the
Hymenochaetales, sequences of the nuclear ribosomal
ITS1-5.8S-ITS2 region from 96 strains were analyzed. The
results showed that Trichaptum and Schizopora are closely
related to the Hymenochaetales. But Asterostroma,
Phaeolus, and Vararia are placed outside the
Hymenochaetales. Total twelve groups were recognized as
separate clades. Eight groups were same as those
recognized by early mycologists: Phellinus robustus
complex (= Fomitiporia Murrill 1907), P. pini complex (=
Porodaedalea Murrill 1905), P. igniarius complex (=
Phellinus Quélet 1886), P. rimosus complex (= Fulvifomes
Murrill 1914), P. ferruginosus complex (= Fuscoporia
Murrill 1907), Inonotus radiatus complex (= Mensularia
Lazaro 1916), I. hispidus complex (= Inonotus P. Karst.
1880) and the eighth group (= Inocutis Fiasson & Niemelä
1984). Four groups were newly recognized in this study.
The first group was temporarily named as P. linteus
complex. Hymenochaete formed two separate groups that
did not include any species of Phellinus and Inonotus. The
last group, consisted of three Phellinus species and two
Inonotus species, occupied a basal position of the main
clade and clustered with Schizopora and Trichaptum. The
present study confirmed that Phellinus is polyphyletic and,
furthermore, rejected the widely acknowledged monophyly
concept of Inonotus. The species of Inonotus were so
intermingled with Phellinus species that the genus became
topologically polyphyletic.
697 - Secondary metabolite syndromes in the lichen
genus Letrouitia (Ascomycota, Letrouitiaceae)
S. Johansson * & U. Søchting
Department of Mycology, Bothanical Institute, University
of Copenhagen, O. Farimagsgade 2D, DK-1353
Copenhagen K., Denmark. - E-mail:
s.johansson@get2net.dk
Secondary metabolites from the lichen genus Letrouitia
Haf. & Bell. were analysed with HPLC. Most of the
species contained the anthraquinones parietin and fragilin,
and a few also 7-chloroemodin. In addition, a number of
additional secondary compounds were detected, presenting
chemosyndromes that in most cases are characteristic for
each species.
698 - Biology and systematics of the Saprolegniaceae: A
treatise
T.W. Johnson 1 , R.L. Seymour 2 & D.E. Padgett 3*
1 Duke Univ. (retired), Durham, NC, U.S.A. - 2 The Ohio
State Univ. (retired), Columbus, Ohio, U.S.A. - 3 The Univ.
of NC at Wilmington, Wilmington, NC, U.S.A. - E-mail:
Padgett@uncwil.edu
We are pleased to announce the impending publication of a
comprehensive treatise on the biology and systematics of
the watermolds (Mastigomycota: Saprolegniaceae). This
work critically analyzes the world literature on this family
covering the period from 1750 through 1987 - citing >2800
references - with a brief excursion to 2000 in the
systematic section. It includes 30 chapters (with 49 tables
and 58 figures) dealing with important aspects of
watermold biology and an additional 20 in which we
present a comprehensive revision of the systematics. Keys
to the family and genera are presented together with
extensive illustrations of included taxa. This work will be
available to the world scientific community at no charge on
the worldwide web probably by August 2002. It can be
accessed using the URL http://www.ilumina-dlib.org/ by
selecting "advanced search". In the advanced search
window, type "Padgett" in the "contributor search
window", tic "book" in the "learning resource type"
window directly below, then click on the "submit" button.
We hope that our effort will stimulate renewed interest in
this fascinating group of organisms.
699 - Systematics of Australian Dermocybe
R.H. Jones 1 , T.W. May 2* & F. Udovicic 2
1 School of Botany, The University of Melbourne, Victoria
3010, Australia. - 2 Royal Botanic Gardens Melbourne,
Private Bag 2000, South Yarra, Victoria 3141, Australia. -
E-mail: tom.may@rbg.vic.gov.au
The ectomycorrhizal basidiomycete genus Dermocybe is
well represented in a diverse range of ecosystems on most
continents. There has been a paucity of reliable taxonomic
information for Australian species, and many collections of
Dermocybe from Australia have previously been
incorrectly assigned to Northern Hemisphere species.
Several Australian species have considerable differences in
pigment chemistry to their Northern counterparts, including
a number of unique chemical compounds. Morphology and
pigment chemistry (thin-layer chromatography) were used
in phenetic analyses of 110 Australian Dermocybe
collections. Nineteen taxonomic groups were identified at
species level, of which 11 are undescribed. Representatives
from 12 of these groups were combined with 25 other
members of Cortinarius and Dermocybe from the Northern
and Southern Hemispheres in parsimony analyses using
ITS rDNA sequence data. Trees show Dermocybe as
monophyletic, but Cortinarius as paraphyletic. Dermocybe
aff. sanguinea from the Southern Hemisphere is sister
group to the clade of Northern Hemisphere dermocybes.
Northern Hemisphere members of Dermocybe, with the
exception of D. olivaceopicta, form a separate clade to the
Southern Hemisphere taxa. Southern Hemisphere
Dermocybe are consistently placed basal to Northern
Hemisphere members.
Book of Abstracts 211