1985 - Mycological Society of America

20
for the first time with hypogeous Basidiomycota in
the genera Alpova, Cautieria, Leucogaster,
Leucophleps, Mycolevis, Radiigera and Ascomycotina
in the genus Ceopora. These combinations gave
positive results: Alpova trappei Fogel with
Douglas-f ir, lodgepole pine, and Sitka spruce ;
Gautieria monticola Harkn. and g. crispa Stewart L
Trappe with lodgepole pine and Douglas-fir or Sitka
spruce, respectively; Cautieria otthii Trog. with
lodgepole pine and Sitka spruce; Geopora cooperi
Harkn. and Leucogaster rubescens Zeller h Dodge
only with Douglas-fir; Leucophleps spinispora Fogel
and Mycolevis Sicci~leba Smith with Douglas-fir,
~p ~-
lodgepole pine, ponderosa pine, and western
hemlock; Radiigera fuscoaleba Zeller only with
western hemlock. In addition, Boletus mirabilis
Murr., a lignicolous agaric, and Lycoperdon
pyriforme Pers., a often lignicolous true puffball,
formed mycorrhizae with western hemlock. The
relationship of these results to the ecology of
these taxa is discussed.
Cavender, J. C., see Hammer C. A.
T.E. CHASE and R.C. ULLRICH. Botany Dept., University
-- of Vermont, Burlington, VT 05405. Genetics of intersterility
in Heterobasidion annosum.
Our mating studies using a world-wide collection of
strains of this root-rotting basidiomycete provide
data on the genetic system determining intersterile
groups (i.e., biological, species). We have identified
five intersterility (IS) genes. The IS genes and alleles
are designated: VI+/Vl-, Vz+/VZ-, V3+/V3-, St/
S-, and P+/P-. To be interfertile, two homokaryons
must each carry a + allele for the same IS gene (e.g.,
in the case of V1+ VZ- V3- S+ P- x Vl- V2- L13+ S+ P-
the two are interfertile by virtue of St. Homozygosity
for the positive alleles of any IS gene suffices
and negative alleles do not affect the positive interaction.
These IS genes function to determine intersterility
and interfertility independently of incompatibility
(i.e., mating type) alleles. Therefore,
within interfertile groups, compatible homokaryons
must be heterozygous for incompatibility alleles
(e.g., A1 x A?). Many of the first isolates studied
from nature carry - alleles for all V genes and are
either S+/P- or S-/P+. Consequently, the IS' and 'PI
intersterile groups were recognized first. The V
genes were implicated subsequently when samples were
increased. Our conclusions are based on analyses of
crosses involving progeny from naturally-occurring
isolates and interfertile crosses. These data provide
the first model for the genetic basis of intersterility
and speciation in higher fungi.
Choi, H. T., see Ross, I. K., et. al.
Chung, W. C., see Setliff, E. C.
W. G. CIBULA and C. L. OVREBO. Earth Resources Laboratory,
NASA, NSTL Station, MS 39529 and Matthaei
Botanical Gardens, The University of Michigan, Ann
Arbor, MI 48105. Diversity and distribution of
mycorrhizal basidiomycetes in two Pinus taeda plots
in Mississippi.
Mycorrhizal basidiomycetes were inventoried in 2
plots of Pinus taeda on a weekly basis in 1974-1975,
1975-76 and 1983-84. The 120 x 120 foot plots have
25 year old trees at 10 foot spacings, resulting in
144 subplots. The two plots differ with seedlings
of one having received a single dose of N-P-K
fertilizer at the age of one year. The total wood
volume today in the fertilized plot is twice that
of the unfertilized plot. A greater diversity of
fungi and a greater number of sporophores occurred in
the fertilized plot during each sampling period.
Collection data from each subplot have been entered
into a computer in such a manner that the spatial
distribution of sporophore production for each
species on each collectiondate, along with seasonal
or yearly sums, has been preserved. These sum files
were subjected to various statistical tests, such as
the Pearson r correlation coefficient, for further
analysis. Species showing good spatial correlations
between seasons include Cortinarius semisanguineus,
Suillus decipiens and Tricholoma flavovirens.
Also,.an algorithm has been developed to calculate
the relationship between the species in a specific
subplot with all other species within the subplot.
Differences in aircraft radiometric remote sensor
values between 0.4 & 2.5 pm correlate well with the
differences in mycorrhizal involvement demonstrated
by the observed field data.
W. G. CIBULA, D. P. LEWIS and N. S. WEBER.
m~r/~RL,at'l. Space Tech. Lab., NSTL, MS
39529; Temple-Eastex, Evadale TX 77615;
Herbarium, Univ. of Mich., Ann Arbor, MI
48109. Observations on the boletes of the
Gulf Coast region.
The diversity of boletes in southeastern
North America is perhaps the greatest on the
continent. These mycorrhizal fungi include a
number of species which are seldom
encountered in other regions of North
America. Some elements of the bolete flora
such as Boletellus ananus occur elsewhere in
tropical regions, particularly the Asian
tropics. Other species such as Boletus
catervatus, described from the Asian tropics,
have been found on the Gulf Coast. Species
diversity in Suillus and Leccinum appears to
be lower in the Coastal Plain than elswhere
in North America while that of Tylopilus,
Strobilomyces, and Boletus seems to be
greater.
Clark, J., see Hu, F.-S, et. al. -
Clark, J., see Hu, F.-S.
- K.W. OOCHRAN. Departments of Epidemiology and of
~rmacology, University of Michigan, Ann Arbor, M I
48109, and NAMA Committee. Cases reported to the
NAMA Mushroan Poisoning Case Registry in 1984.
In 1984 the Registry received 61 reports involving
87 cases, sane involving earlier events. Most cases
(87%) involved mushrcuns ingested for fccd; 8% for
non-nutritional recreation; 5% accidently by
children Eight cases involved unknown s~ecies: 6
cases, mixed species - all Amanita. ~hlo~o~hyllun
mol Mites was the most frequently reported species
&followed
by Annillaria mellea, 6; mnita
pantherina and Collybia acervata, 4; Amanita
muscaria and Leucoagaricus naucinus, 3. TWO fatal
cases involved Amanita bisporigera and Psi locybe
cubensis, the latter anaphylactically. With the
newly reported cases, 2 or more incidents have now
been reported to the Registry for the following
species (syrnptams for all were gastrointestinal and
as noted): Amanita muscaria, 5 -2 with very viscous
mucus, 1 each ha1 lucination and unconscious; A.
virosa 4; millaria mellea, 6; Collybia acervatya
-I