Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme III: PATHOGENS AND NUISANCES, FOOD AND MEDICINE Posters
absoluta, on the other hand that of F. palustris was done by
those of Cladia aggregata, Haematomma puniceum and
Xanthoria elegans.
919 - Wood stain and causal fungi on Canadian
hardwood species
D.Q. Yang * , M.-C. Bisson, M. Gignac & T. Lihra
Forintek Canada Corp., 319 rue Franquet, Sainte-Foy,
Quebec, G1P 4R4, Canada. - E-mail: dianqing.yang@qc.forintek.ca
In most countries, trees are harvested into logs and stored
in a log yard for a certain time before sawing into lumber.
Logs left lying on the ground during warm weather are
vulnerable to attack by sapstaining fungi. Wood sapstain is
caused by several groups of fungi that penetrate deeply into
wood with dark pigmented hyphae. Hardwood species are
used to a greater extent in value-added wood products,
reducing sapstain in these species has a significant
economical impact. This study investigated the speed of
sapstain development in Canadian hardwood species and
the major fungal species involved in this discoloration.
Trees of sugar maple and yellow birch were felled in June
2001. Logs were transported to and stacked in a sawmill
within two weeks after felling. The evaluation was
conducted every 2 weeks. Logs were sampled into discs,
stain development on these discs was examined, and
isolation and identification of staining fungi were followed
up. The results showed that stain was detected on logs 3
weeks after harvesting and logs were stained less than 5%
of wood in 5 weeks. After 13-week storage, most sapwood
of logs was stained. Yellow birch was more susceptible to
fungal stain than sugar maple, and log ends were more
stained than the internal sections. The frequently isolated
sapstaining fungi were Ophiostoma piceae, O. piliferum,
Leptographium sp., Aureobasidium pullulans, Alternaria
alternata, and Cladosporium cladosporioides.
920 - Production, formulation and application of a
bioprotectant for wood protection
D.Q. Yang * , M. Gignac & M.-C. Bisson
Forintek Canada Corp., 319 rue Franquet, Sainte-Foy,
Quebec, G1P 4R4, Canada. - E-mail: dianqing.yang@qc.forintek.ca
Moulds, stain and decay cause serious problems on wood
utilization. Though a growing volume of wood is kilndried,
the market for green exports remains significant, and
environment-friendly wood protection is required to
replace traditional chemicals. As a solution to this problem,
Forintek Canada Corp. developed a bioprotectant for
protecting logs and green lumber from moulds, stain and
decay, which was granted a US patent. The method relies
on an albino fungus, Gliocladium roseum. One objective of
the project was to assess the technical feasibility of large-
scale production and utilization of this bioprotectant.
Fermentation in 150L fermentors was achieved within
three days. The spores and mycelia of the fermented fungus
were formulated into a powder form. A shelf-life study
indicated that this bioprotectant did not lose any of its
vigour after one-year storage at -20 °C. Large-scale
application and efficacy tests were carried out on 2400
boards in a sawmill; the lumber tested was a mix of 2"x 3"
x 8' black spruce and balsam fir boards. The treatment was
applied in two different manners: a) with a spray system
normally used for chemical application, and b) by dipping
in a tank. After three months storage at the mill, 100
percent of the treated board were found to be acceptable as
compared to only 36 percent for untreated controls.
921 - Medicinal mushrooms as inhibitors of
angiogenesis
M. Yassin 1* , J. Mahajna 2 & S.P. Wasser 1
1 Institute of Evolution University of Haifa, Mount Carmel,
Haifa 31905, Israel. - 2 Galilee Institute for Applied
Research, P.O. Box 415, Nazareth 16103, Israel. - E-mail:
majedyassin22@hotmail.com
Medicinal mushrooms have been an important source of
therapeutic substances for the treatment of various human
illnesses including cancer. In Japan, few polysaccharide
antitumor agents have been developed such as lentinan,
krestin, and schizophyllan. Angiogenesis is an essential
component of the body's physiology and contributes to the
pathogenesis of a variety of diseases such as psoriasis,
rheumatoid arthritis, and cancer. Our objective is to select a
medicinal mushroom extracts with anti-angiogenic and
antitumor activities, monitoring ability of selected
mushroom extract to interfere with the proliferation of
endothelial cells and other tumor cell lines. Our interest is
on selecting mushroom extracts that promote apoptosis of
the appropriate cell lines. We developed rapid, accurate and
reliable assays that allowed us to detect different events of
apoptosis. More than thirty species of edible and medicinal
higher basidiomycetes were evaluated. Screening data of
selected medicinal mushroom extracts will be presented.
Selected mushroom extracts or fractions that show
promising activity in the screening assays will be further
evaluated in animal models.
922 - Identification of viruses from diseased edible
mushrooms, Pleurotus ostreatus, Pleurotus eryngii and
Flammulina velutipes
H.J. Yu, J.S. Lee, Y.C. Kwan, N.J. Lee & H.S. Lee *
Division of Life Science, college of Natural science, and
Genetic Engineering Institute, Gyeongsang Natl. Uni. 660-
701 Chinju, Korea. - E-mail: hslee@nongae.gsnu.ac.kr
Natural viral epidemic was observed in the commercial
farms of edible mushroom, Pleurotus ostreatus, Pleurotus
Book of Abstracts 277