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Persoonia
An International Mycological Journal
Volume 18 - 1 2002
Contents of this issue
J.
de Gruyter, G.H. Boerema & H.A. van der Aa
E.O.
Albertó, R.H. Petersen, K.W. Hughes & B. Lechner
A.
Sánchez, G. Moreno, C. Illana & H. Singer
J. de
Gruyter
B.
Kullman
C. Bas
V.B. Hosagoudar
K.B. Vrinda, C.K. Pradeep, Sibi Mathew & T.K. Abraham
Á. Bańares & E. Arnolds
Branislav Ranković
C.B. Uljé & A. Verbeken
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Contributions towards
a monograph of Phoma (Coelomycetes) VI–2. Section Phyllostictoides: outline of
its taxa
J. de Gruyter, G.H.
Boerema & H.A. van der Aa
Thirty taxa in Phoma sect. Phyllostictoides, characterised by secondary
septation of a variable number of conidia, are described in vitro. Two
Phyllostictoides-like species are (re)classified in sect. Sclerophomella on
account of certain pycnidial characteristics. Short notes on the ecology and
distribution are added. Newly proposed taxa are: Phoma acetosellae (A.L. Sm. &
Ramsb.) Aa & Boerema comb. nov., Phoma argillacea (Bres.) Aa & Boerema comb.
nov. (teleomorph Didymella applanata (Niessl) Sacc.), Phoma nepeticola (Melnik)
Dorenb. & de Gruyter comb. nov. (teleomorph Didymella catariae (Cooke & Ellis)
Sacc.), Phoma destructiva var. diversispora de Gruyter & Boerema var. nov.,
Phoma heliopsidis (H.C. Greene) Aa & Boerema comb. nov., Phoma laundoniae
Boerema & De Gruyter spec. nov. and Phoma rhei (Ellis & Everh.) Aa & Boerema
comb. nov. A key is given to the cultural characteristics of all species and
varieties at present recognised within the section (including the two Phyllostictoides-like species of
Sclerophomella), as well as indices on
host-fungus and fungus-host relations.
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Miscellaneous notes on Pleurotus
E.O. Albertó, R.H.
Petersen, K.W. Hughes & B. Lechner
The paper takes up
four points: 1) A previously unnamed intersterility group in Pleurotus (ISG
XIII) has been identified as P. albidus, which fruits from Central America to
central Argentina. The species is genetically isolated and phylogenetically it
is placed in the ‘P. ostreatus’ group of monomitic Pleurotus basidiomata. 2) The
distributional range of P. abieticola is extended to far northwestern Russia and
northern China. 3) A partial nomenclator is furnished for P. djamor 4) The use
of the term ‘dimitic’ is discussed as it pertains to Pleurotus.
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A
study of nivicolous Myxomycetes in southern Europe, Sierra de Guadarrama, Spain
A. Sánchez, G. Moreno, C. Illana & H. Singer
Eleven taxa of Myxomycetes collected from around melting snow banks in
mountainous and alpine areas of the Sierra de Guadarrama (Madrid, Segovia) are
presented. From a chronological point of view several new records for the
Iberian Peninsula are interesting: Lepidoderma carestianum,
Lepidoderma granuliferum, Physarum albescens, Physarum alpestre
and Trichia sordida var. sordida. SEM micrographs of spores and
capillitia of the most significant species are included.
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Contributions towards a monograph of Phoma (Coelomycetes) – IX.
Section Macrospora
J. de Gruyter
Nine species of Phoma, characterised by always producing relatively large
conidia, usually between 7–25 x 2.5–8 µm, aseptate or partly septate, are
documented and described in vitro. Three of these fungi could not be described
in the usual way, because living cultures were no longer available. The
following new taxa are proposed: Phoma andropogonivora (R. Sprague
& Rogerson) comb. nov., Phoma boeremae nom. nov., Phoma
commelinicola (E. Young) comb. nov. and Phoma gossypiicola
nom. nov. The combination Phoma rabiei proposed by Khune is
validated along with its teleomorph Mycosphaerella rabiei
Kovatsch. Keys and indices on host-fungus and fungus-host relationships are
provided and short comments on the ecology and distribution are given.
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Nuclear DNA content, life cycle and ploidy in two
Neottiella species
(Pezizales, Ascomycota)
B. Kullman
Genome size, life cycle, and ploidy were determined for Neottiella vivida
(Nyl.) Dennis and N. rutilans (Fr.) Dennis. The relative DNA content was
measured from fruit-bodies using cytofluorometry; genome size was obtained by
comparison with two standards: conidia of Trichophea hemisphaerioides
(23.3 Mb) and a spore-print from Pleurotus ostreatus (25 Mb).
Neottiella vivida and N. rutilans were found to have genomes
of approximately 750 Mb and 530 Mb, respectively. The ploidy level of N.
rutilans is 50, that of N. vivida was calculated to be 70. In N.
vivida, meiotic division occurs in the ascus apex where giant mitochondria
with a DNA content of 60 Mb, 54 Mb, and 30 Mb were found.
The two species are morphologically very similar and can
be distinguished only by their ascospore ornamentation, which is
reticulated in N. rutilans and warted in N. vivida. Due to
endoreduplication in the uninucleate ascospores of N. vivida, the value
of their nuclear DNA content is 2C. In N. rutilans, endoreduplication is
not arrested at the 2C value but may proceed at a different rate in spores. Thus
N. rutilans reveals heterogeneity in ploidy levels of sporal nuclei. In
N. vivida and N. rutilans, differences in spore ornamentation may
result from different patterns of gene expression regulated by the
ploidy-dependent gene.
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A reconnaisscance of the genus
Pseudobaeospora in Europe – I
C. Bas
About 40 collections of
Pseudobaeospora species from all over Europe have been studied. A key is
presented to the 13 species recognised and two provisionally defined ones. Latin
diagnoses of six new species, one new variety and one new forma are given.
Part one of this paper contains
an introduction, a key to the taxa studied and Latin diagnoses of the new taxa.
Part two will contain the description of the genus, full descriptions and figures
of all taxa treated, and discussions.
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V.B. Hosagoudar
An account is given of three
foliicolous fungi from India. Two new species, viz. Clasteosporium
cyperacearum and Questieriella grewiae are described. Dysrhynchis
uncinata forms a new generic and specific record to India and is reported on
an endemic host.
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Lactarius ignifluus (Russulaceae),
a new speciec from India
K.B. Vrinda, C.K. Pradeep, Sibi Mathew & T.K. Abraham
Lactarius ignifluus, a new
species in the Russulaceae is described and illustrated from Kerala. The
combination of lignicolous habitat, bright scarlet, veined basidiomes,
unchanging scarlet red latex and lack of sphaerocytes in the hymenophoral and
pileal trama characterize this new species.
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Hygrocybe
monteverdeae, a new species of subgenus Cuphophyllus (Agaricales) from the Canary
Islands (Spain)
Á. Bańares & E. Arnolds
Hygrocybe monteverdae,
collected in monte-verde forest in the Canary Islands, is proposed as a new
species belonging to subgenus Cuphophyllus. Its most remarkable character
is the blackening lamellae after drying, being the sole species with this
feature in the subgenus.
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Erysiphe
hellebori, a new agent of powdery mildew in Yugoslavia
Branislav Rankovi
A new agent of powdery mildew in
Yugoslavia, Erysiphe hellebori spec. nov., which parasitizes
Helleborus odoratus L., is described and illustrated.
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A new species
in Coprinus
subsection Setulosi
C.B. Uljé & A. Verbeken
Coprinus canistri spec. nov. is
proposed. It belongs to the subsection Setulosi because of the presence
of pileo- and caulocystidia. A comparison is given with C. subimpatiens
and C. congregatus, on account of similar microscopical characters.
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