Book of Abstracts (PDF) - International Mycological Association

IMC7 Thursday August 15th Lectures
295 - Phylogenetics in the Pezizaceae / Ascobolaceae
lineage
K. Hansen * & K.F. LoBuglio
Harvard University Herbaria, 22 Divinity Ave.,
Cambridge, MA 02138, U.S.A. - E-mail:
khansen@oeb.harvard.edu
Together Pezizaceae and Ascobolaceae appear to be a wellseparated
lineage within the Pezizales supported by nuclear
rDNA sequence data, iodine positive asci (unique to these
families within the Pezizales), uninucleate spores, presence
of an internal, circular indentation of the ascus apical
apparatus, and some similarities in the type of ascus
septum pore plugging. The family boundaries, however,
remain questionable and will be addressed here,
particularly with regard to the placement of Iodophanus
and Thecotheus. Delimitation and relationships among
genera within the Pezizaceae are highly controversial. Our
previous analyses of 90 partial nuclear LSU rDNA
sequences suggest that the circumscription of the large
genus Peziza and other genera of the Pezizaceae, e.g.
Plicaria, Amylascus, Scabropezia, Hydnotryopsis and
Sarcosphaera should be re-evaluated. Peziza is composed
of at least 6 major lineages, most of which include other
genera of the Pezizaceae. In this study we will investigate
the evolutionary relationships within the Pezizaceae using
analyses of an expanded LSU rDNA data set, in
combination with analyses of sequences from a portion of
the protein coding nuclear genes β-tubulin and RPB2 for
subsets of the taxa. A phylogenetically based classification
of Pezizaceae is in progress.
296 - Ophiostomatoid fungi associated with the Eastern
Himalayan spruce bark beetle Ips schmutzenhoferi and
other bark beetles in Bhutan
T. Kirisits 1* , M.J. Wingfield 2 & D.B. Chhetri 3
1 Institute of Forest Entomology, Forest Pathology and
Forest Protection (IFFF), Universität für Bodenkultur
Wien, Hasenauerstrasse 38, A-1190 Vienna, Austria. -
2 Forestry and Agricultural Biotechnology Institute (FABI),
Faculty of Biological and Agricultural Sciences, University
of Pretoria, Pretoria 0002, South Africa. - 3 Renewable
Natural Resources Research Centre (RNR-RC) Yusipang,
P. O. Box 212, Thimphu, Bhutan. - E-mail:
kirisits@edv1.boku.ac.at
The bark beetle Ips schmutzenhoferi infests Eastern
Himalayan spruce (Picea spinulosa) and Himalayan blue
pine (Pinus wallichiana) and has been known to cause
destructive outbreaks in conifer forests of Bhutan, Eastern
Himalayas. We have recently conducted a preliminary
investigation of the assemblage of ophiostomatoid fungi
associated with I. schmutzenhoferi. The mycobiota of two
other Himalayan bark beetles (Polygraphus sp. and
Dryocoetes sp) was also considered. Nine, two and four
ophiostomatoid fungi were found to be associated with I.
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Book of Abstracts
schmutzenhoferi, Polygraphus sp. and Dryocoetes sp.,
respectively. In total, 13 ophiostomatoid fungi, including 1
Ceratocystis sp., 2 Ceratocystiopsis spp., 6 Ophiostoma
spp., 3 Leptographium spp. and 1 Pesotum species were
collected. The spectrum of fungi associated with I.
schmutzenhoferi included Ceratocystis sp.,
Ceratocystiopsis minuta, 2 Leptographium species (sp. 1
and sp. 2), Pesotum sp., Ophiostoma cf. ainoae, O. cf.
cucullatum, Ophiostoma sp. 1 and Ophiostoma piceae.
Polygraphus sp. was associated with Ceratocystiopsis sp.
and Ophiostoma sp. 3, while Leptographium sp. 3,
Ophiostoma sp. 1, Ophiostoma sp. 2 and O. piceae were
associated with the Dryocoetes sp. The majority of these
fungi are suspected to belong to hitherto unknown taxa and
investigations on their taxonomic placement are
continuing. This study has improved our knowledge on the
occurrence and taxonomy of ophiostomatoid fungi and
their vectors in the Himalayas.
297 - Taxonomy, host relationships and breeding
systems in Ophiostoma minus and O. pseudotsugae
J.F. Webber 1* & C. Gorton 2
1 Forestry Commission Research Agency, Alice Holt Lodge,
Farnham, Surrey, GU10 4LH, U.K. - 2 RHS, Wisley,
Woking, Surrey, GU23 6QB, U.K. - E-mail:
joan.webber@forestry.gsi.gov.uk
Ophiostoma minus is widely recognised both as a bluestain
fungus causing discoloration of harvested lumber and as a
pathogen of standing pines. On pine, O. minus is usually
associated with bark beetle vectors: with Tomicus
piniperda in Europe and with Dendroctonus frontalis in the
USA. There is another Ophiostoma species, O.
pseudotsugae, that is morphologically very similar to O.
minus and so the two species have been considered to be
synonomous. However, analysis of behavioural traits,
molecular markers and breeding systems have
demonstrated that O. minus and O. pseudotsugae are
separate biological species. Moreover, it is also apparent
that isolates currently identified as O. minus, comprise two
distinct taxa that can be distinguished on the basis of their
mating behaviour: one is homothallic and the other it is
heterothallic. The extent to which these taxa should be
considered as separate species is considered.
298 - Hitch-hikers with invasive Tetropium fuscum
(Fabr.) (Coleoptera: Cerambycidae) in Atlantic Canada
K. Jacobs 1* , K.A. Seifert 1 , K.J. Harrison 2 , G. Smith 2 & T.
Kirisits 3
1 Eastern Cereal and Oilseed Research Centre, Agriculture
and Agrifood Canada, 960 Carling Avenue, Ottawa, K1A
0C6, Canada. - 2 Natural Resources Canada, Canadian
Forest Service, Atlantic Forestry Centre, Fredericton, E3B
5P7, Canada. - 3 Institute of Forest Entomology, Forest
Pathology and Forest Protection, Universität für