Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme I: BIODIVERSITY AND CONSERVATION Posters
prioritiy, and as an important item to the management of
protected areas, is recent in Portugal. The increasing
perception that the harvest of wild mushrooms has greatly
intensified in recent years and the negative influences both
on general biodiversity and on mycological diversity that it
might have, and also the general lack of knowledge on
Portuguese fungal patrimony, were the main reasons to
initiate a project involving four protected areas in Central
and Northern Portugal coordinated by the Portuguese
Institute for the Conservation of Nature. This project
involves the measurement of macrofungal diversity in
several priority habitats listed in the Habitats Directive
using a common sampling method. The macrofungal data
will be complemented with environmental and vegetation
parameters necessary for the assessment of the micota's
ecological context.
568 - Foliicolous lichens of La Réunion
S. Rønhede, 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
The foliicolous lichen flora of the French island La
Réunion was investigated based on 113 leaf samples
collected at seven localities. They represent different types
of rain forest at altitudes from 160 to 1700 m. 27 species
were identified, of which 16 are new to La Réunion.
Tricharia amazonum is reported for the first time outside
the neotropics, and Porina atriceps and Badimia pallidula
are new to the African continent with adjacent islands.
569 - Vertical distribution of ectomycorrhizal fungi in a
podzol profile
A. Rosling 1* , R. Landeweert 2 , B.D. Lindahl 1 , K.-J.
Larsson 3 & T.W. Kuyper 2
1 Department of Forest Mycology and Pathology, SLU, Box
7026, 750 07 Uppsala, Sweden. - 2 Sub-dept of Soil Quality,
Wageningen University, Box 8005, NL-6700 EC,
Wageningen, The Netherlands. - 3 Systematic Botany /
Herbarium GB, Botanical Institute, Göteborg University,
Box 461, SE-405 30 Göteborg, Sweden. - E-mail:
Anna.Rosling@mykopat.slu.se
Ectomycorrhizal (ECM) fungi form symbiotic associations
with roots of woody plants and are important in nutrient
uptake in boreal forests. Podzols are highly stratified soils.
Most studies of ECM species composition focus on the fine
roots in the organic soil. The variation in ECM community
structure between different soil horizons is thus poorly
understood. We studied the vertical distribution of ECM
roots in a podzol soil in the north of Sweden. In three
continuous soil columns, seven horizons were
distinguished and sampled, from the top organic layer to
the bottom parental material at 50 cm depth. Root tips from
each horizon were sorted into morphotypic groups. These
were verified and identified by sequencing of the rDNA
ITS region. Root tip density decreased from the O horizon
down to the E2 horizon but increased again in the B
horizon before declining to low values in the C horizon.
Half of the root tips were found in the mineral soil. The
degree of ECM colonization varied from 60 to 98%, but
did not follow a clear pattern with respect to depth. We
distinguished 22 ECM taxa, half of these were found only
in the mineral horizons. The abundance of taxa in different
horizons was analysed by correspondence analysis. We
found a significant relationship between ECM taxon and
soil horizon. The different horizons in a podzol profile
represent different environments and the specific
distribution of certain fungi could be explained by their
functional role in the system.
570 - Leprose lichens in Estonia
L. Saag
University of Tartu, Lai street 38, Tartu, Estonia. - E-mail:
lsag@ut.ee
Over 60 usually sterile sorediate crustaceous lichen species
have been registered from Estonia. Such species occur in
many genera which ordinarily produce ascocarps. Majority
of the constantly asexual taxa are gathered into g. Lepraria
and g. Leproloma (Lichenes Imperfecti), some of them
have tentatively been assigned to other genera (Fuscidea
pusilla Tonsberg, Lecanora norvegica Tonsberg et al.).
The first checklist of Estonian lichens published in 1970
included 8 Lepraria species, only one of them - L. incana -
belongs to that genus nowadays. Primitive morphology and
often complex secondary chemistry of representatives of
the leprose growth form makes their identification
complicated and chemical analysis (TLC) essential.
Currently 11 Lepraria and 1 Leproloma species are
reported from Estonia, occurrence of lately described
Lepraria atlantica Orange is in question.
571 - Experimental study for increasing productivity of
Boletus edulis s.l. in Italy
E. Salerni * & C. Perini
University of Siena Dep. Environmental Sciences, Via P.A.
Mattioli - 4 - 53100 Siena, Italy. - E-mail: salerni@unisi.it
Species grouped together as Boletus edulis s.l. are the
mushrooms in highest demand and best known in Italy:
they are a typical minor forest product of the hill and
mountain belt of the penisula, of major economic
importance in some cases surpassing the commercial value
of timber. More than 140 ectomycorrizhal fungi are
regarded as edible but only a small percentage have been
successfully cultivated. For the other species, including the
highly prized penny bun mushroom, no technique of stable
Book of Abstracts 173