Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme I: BIODIVERSITY AND CONSERVATION Posters
498 - Description of Lactarius indigo and L. deliciosus
mycorrhizas on nine pine species
R.E. Flores 1* , M. Honrubia 1 , G. Díaz 1 & M.C. Bran 2
1 University de Murcia, Depto. Biología Vegetal (Botánica),
Facultad de Biología. Campus de Espinardo 30100, Spain.
- 2 Universidad de San Carlos de Guatemala, DIGI/Fac.
CCQQ y Farmacia, Edif T-12 Ciudad Universitaria.
01012, Guatemala. - E-mail: rfloresa@yahoo.com
The main macro and microscopical features of mycorrhizas
of Lactarius indigo Schw. ex Fr. and Lactarius deliciosus
Fr. with five species of Mesoamerican pines (Pinus
ayacahuite, Pinus hartwegii, P. oocarpa, P. pseudostrobus
and P. rudis) are presented. Also description with
microscopical and SEM pictures of mycorrhizas of L.
indigo with Pinus halepensis, P. nigra, P. pinaster and P.
sylvestris are shown. The work was made in a growth
chamber and using plastic containers with peat mossvermiculite
substrate. Inocula of selected strains of
Lactarius deliciosus and L. indigo were applied directly to
the radicular systems of the seedlings. The results seems to
be the first published for Lactarius indigo, a known edible
species in America, especially in Mexico and Guatemala,
and also the mycorrhizas of L. deliciosus with
Mesoamerican pines. These results are very important to
the production of mycorrhized plants in Central America,
especially with these edible mushrooms, because they
could be of use in potentiating reforestation and for
providing extra income and food to farm people, specially
in Guatemala, Honduras, El Salvador and Nicaragua.
499 - Russian species of the genus Alternaria Nees
Ph.B. Gannibal
St.Petersburg State University, Universitetskaja nab. 7-9,
St.Petersburg, 199034, Russia. - E-mail:
philipp@rsp.spb.org
Alternaria is a very widespread genus of dematiaceous
fungi. Many species are serious pathogens of crops.
Despite on long history of its investigation, there are some
different opinions about genus taxonomy. Formerly closed
species were distributed between two genera - Alternaria
and Macrosporium Fr. In 1969 the name Macrosporium
was abolished, and the name Alternaria became the only
(Levkina L.Ì. 1984. Mycol. and Phyt. 18, 1). The genus
Alternaria was revised several times. There are more than
100 described species now, but not all descriptions are
admitted. The paper of Egorova about fungi on Russian Far
East contains the most complete list of Alternaria species
in Russia (Egorova L.N. 1999. Mycol. and Phyt. 33, 1).
There are 43 well-known and 7 insufficiently investigated
species in this region. They infect 72 plants. A. citri Ell. et
N. Pierce, A. mali Roberts, A. longipes (Ell. et Everh.)
listed by Egorova are considered A. alternata (Fr.) Kiessl.
now (Rotem J. 1994). There are a few papers, which add
some other species in total list. For instance, there is A.
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Book of Abstracts
saponariae (Peck) Neerg. in the roll of Russian arctic fungi
(Rus. Arctic Fungi. 1999). Our collections include some of
these Alternaria species. In two main Russian mycological
herbariums we reveal at least 5 species, which are absent in
the list of Alternaria species from Far East. Using prior
analysis of literature and herbarium material, we can
conclude that there are about 50 Alternaria species in
Russia.
500 - Diversity of ectomycorrhiza in Quercus rubra L.
stands of different age on reafforested mining sites
S. Gebhardt * , J. Wöllecke & R.F. Hüttl
Brandenburg University of Technology, Chair of Soil
Protection and Recultivation, Postfach 101344, 03013
Cottbus, Germany. - E-mail: gebhardt@tu-cottbus.de
Red oaks are planted on 15% of reforested mining sites in
Lower Lusatia and thus belongs to the main tree species
used in reclamation. The mining substrates are
characterized by poor nutrient supply e.g. N and P. Under
such adverse conditions mycorrhizal fungi may play an
important role for the vitality and the survive of these trees.
One aim of this investigation is to charakterize the
morphotypes of mycorrhizae of Quercus rubra. We want to
know if the fungi are above all generalists or if the fungi
are species adapted to these extrem conditions. An other
aim is to compare the ectomycorrhizal fungi which are
common with the neophyt Quercus rubra and indigenous
oak species like Quercus petrea. Soil samples are taken in
oak stands of different age within an area of 720 m& 2 ;. The
mycorrhiza are separated by morphological and genetic
methods. To characterize the extrem soil conditions, the
samples are analysed of pH, phosphate, nitrate, ammonium,
C, N, S, water retention and bulk density. First results
show, that 19 morphotypes of mycorrhizal fungi can be
separated by their mycorrhizae. Some fungi can be
identified by their fruitbody, for example Boletus edulis or
Amanita muscaria. Scleroderma citrinum and Paxillus
involutus can be found as fruitbody and mycorrhiza. The
generalists and 'early stage fungi' Cenococcum geophilum
and Paxillus involutus have an important part in the fungi
coenoses.
501 - Aphyllophorales (Basidiomycotina) of the Atlantic
Rain Forest in Northeast Brazil I. States of Sergipe and
Alagoas
T.B. Gibertoni * & M.A.Q. Cavalcanti
Universidade Federal de Pernambuco, Rua Nelson Chaves
s/n, 50670-420 Recife, Pernambuco, Brazil. - E-mail:
tbgibertoni@hotmail.com
Eight collections of Aphyllophorales were undertaken
between October 2000 and July 2001 in 3 Atlantic Rain
Forest remnants in Northeast Brazil. In the State of Sergipe
4 species of Polyporaceae (Hexagona hydnoides, H.