Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme IV: POPULATION DYNAMICS AND ECOLOGY Posters
1013 - Physiologic races of stem rust of wheat in Egypt
during 1994 - 1996 seasons
M. Nazim 1 , M. Awad 1 , S. Abu El-Naga 2* & I. Youssef 2
1 Agricultural Botany Dept., Faculty of Agriculture,
Minufiya Univ., Shebin El-Kom, Egypt. - 2 Plant Pathology
Inst., Agriculture Research, Center, Giza, Egypt.
The problem of stem rust incidence has been solved since
the release of resistant wheat varieties in Egypt. Also, the
early sowing of wheat varieties made the problem less
serious. However, the appearance of new races is expected.
Therefore, continuous identification of physiological races
of the causal organism is required. In the course of this
study, identification of stem rust physiologic races was
carried out during two successive seasons (1994-1995 &
1995-1996) using the North American wheat stem rust
monogenic differentials. The results obtained revealed the
presence of different physiologic races in Egypt during
both seasons of the study. Races RT-, RR-, TR-, TT-
comprised 92.02% of the total isolates. While, races RT-,
RR-, TR- and TT-comprised 7.98% of the isolated races in
1994/1995 season. On the other hand, in the second season
(1995-1996) races TT-, RT-, RR-, MT- and QF- comprised
47.04% of the total isolates. While, the rest were 29 races
comprised 52.96% of the isolated races. The great
variability of the physiologic races showed the dynamic
state of the pathogen. Also, showed that wheat plants are
liable to be attacked by different races from different
sources.
1014 - Frequency of virulence of Puccinia triticina on
wheat in Egypt during 1998-2001
M. Nazim 1* , S. Sharif 2 , I. Shinoda 2 , O. Bolot 2 & I. Imbabi 2
1 Botany Dept., Faculty of Agriculture, Menofiya
University, Shebin El-Kom, Egypt. - 2 Plant Pathology
Institute, Agriculture Research Center, Giza, Egypt. - Email:
abfahmi@hotmail.com
Leaf rust of wheat is common under the Egyptian
conditions due to the favorable environmental climate for
disease incidence and development. Many wheat varieties
were discarded because of their susceptibilty to the disease
due to the appearance of new virulences and the dynamic
state of the causal organism. The frequency of virulence
was studied against 32 local genotypes and 45 monogenic
lines for leaf rust resistance in addition to the highly
susceptible cv. Thatcher. The results revealed that more
than 75% of the obtained races were virulent to six
genotypes i.e cvs. Giza 139, Giza 155, Giza 157, Giza 160
and Giza 164. Whereas 50-75% of the total races were
virulent to 15 genotypes i.e. cvs. Giza 162, Giza 163, Giza
165, Giza 167, Sakha 8, Sakha 92, Sids I, Sids 2, Sids 3,
Sids 4, Sids 5, Sids 9, Gemmieza 1, Gemmieza 3, and
Sakha line 202. Less than 50% of the total races were
virulent to 11 genotypes i.e. cvs. Giza 168, Sakha 61,
Sakha 69, Sakha 93, Sids 6, Sids 7, Sids 8, Gemmieza 5,
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Book of Abstracts
Gemmieza 7, Gemmieza 9 and Sakha line 206. On the
other hand, no virulence was detected against Lr 19. Low
frequecies were found to Lrs; 15, 21, 24, 28, 29, 36, 38, 39,
40, 41, 42, and 43. Therefore, these genes should be
considered in breeding programme for leaf rust resistance.
High frequencies (more than 80%) were found against Lrs;
1, 2c, 3, 12, 13, 14 a, 22b, 23, 33 and Lr B whereas,
frequencies from 51 - 80% were found on the rest of genes.
1015 - Contribution to the knowledge of the endophytic
mycoflora of roots of sessile oak (Quercus petraea)
D. Novotný
Czech Collection of Microorganisms, Faculty of Science,
Masaryk University, Tvrdého 14, 602 00 Brno, Czech
Republic. - E-mail: novotdad@natur.cuni.cz
The composition of endophytic mycoflora of roots of
sessile oak (Quercus petraea) was studied. This research
was conducted in six oak stands in Krivoklátsko region in
Central Bohemia (Czech Republic). The fungi were
isolated from fine roots (0.1-0.3 cm diam) and from
peridemal bark, subperidermal bark and wood of medium
roots (2-5 cm diam) and coarse roots (0.5-1 cm diam).
After surface sterilisation the roots were cut into segments
and placed onto malt extract agar. More than 60 species of
microscopic fungi were identified from the samples. Fungi
occurred most frequently in fine roots and in peridermal
bark of medium and coarse roots. Wood of coarse roots
was colonised at least. The most frequent fungi were
Phialophora cf. fastigiata, Cryptosporiopsis radicicola,
Cystodendron-like hyaline anamorph, dark septate
endophyte, Umbelopsis nana, Trichoderma viride,
Oidiodendron griseum, Chloridium preusii and
Sporidesmium cf. anglica. Species of genera
Sporidesmium, Chloridium, Chaetosphaeria and
Menispora were mainly isolated from the fine roots.
Rhizomorphs of Armillaria and different mycelia of
Basidiomycetes were recorded in some roots. Bacteria
were common in roots. The study was supported by the
Grant Agency of the Charles University (No. 243/1997/B
BIO/PøF).
1016 - Biodegradation of drying oil claddings by
micromycetes
N. Nugaeva 1* , E. Lebedeva 1 , E. Vedenyapina 1 , I. Smirnov 2
& G. Markov 2
1 Komarov Botanical Insitute of the Russian Academy of
Sciences, 2 Prof. Popov Str., St. Petersburg 197376,
Russia. - 2 RPA V. G. Khlopin Radium Institute, 28 2nd
Murinski pr., St. Petersburg 194021, Russia. - E-mail:
fungi@mail.ru
In the drying-related industry the oil components are of
great utility for covering wood, metal and other materials
and constructions. And there is the problem of its complete