Nitaro Maekawa

Nitaro Maekawa
Tottori University | Toridai · Fungus/Mushroom Resource and Research Center

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145
Publications
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1,580
Citations
Citations since 2017
24 Research Items
778 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150

Publications

Publications (145)
Article
We describe two new species of resupinate Sistotrema sensu lato (Cantharellales) collected in Japan: S. flavorhizomorphae and S. chloroporum. Both species have urniform basidia with more than four sterigmata and monomitic hyphal system, oil-rich hyphae in subiculum, which is typical for this genus. Sistotrema chloroporum is characterized by poroid...
Article
Since 2011, we have collected fungi that form synnema-like structures (SSs) bearing many acanthophyses at the apex on water-splashed wood in streams in various regions of Japan. A provisional phylogenetic analysis of strains isolated from SSs based on their nrDNA sequences implied affinity with Physisporinus (Polyporales, Basidiomycota). However, i...
Article
Hydnum (Hydnaceae, Basidiomycota) exhibits endemic species diversity in East Asia; however, few comprehensive systematic studies have been conducted to date. Here, we performed morphological, ecological, phylogenetic, and biological evaluations of the taxonomy of Hydnum species in Japan. In total, 186 Japanese Hydnum specimens were used for morphol...
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We describe a new species of Gerhardtia from Japan based on basidiomata morphology, live culture characteristics, and molecular phylogenetic analyses. Gerhardtia venosolamellata is found on broad-leaf litter, and is characterized by tricholomatoid to marasmioid basidiomata, an off-white to pale salmon-pink pileus surface with faint marginal striae,...
Article
Corticioid fungi form effused basidiomata with various hymenophore configurations, mostly on woody substrates, and they are presently classified into 15 orders in Agaricomycotina in the phylum Basidiomycota. In this review, the corticioid fungi of Japan are treated on the basis of the current classification system, and all currently known species a...
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Despite the economic and ecological importance of Hydnum species, in vitro synthesis of ectomycorrhizae of this genus has not been reported due to difficulties in establishing pure cultures. We inoculated pure cultures of 12 monokaryotic and 3 dikaryotic mycelial strains of an undescribed Hydnum albidum-like species on roots of axenic Pinus densifl...
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Entoloma clypeatum species complex (ECSC) forms ectomycorrhiza-like roots (EMLR) with host plant species of Rosaceae or Ulmaceae. The EMLR colonized with ECSC are characterized by a thick fungal mantle, absence of a Hartig net structure, and collapse of the apical meristem caused by hyphal invasion. Some researchers have suggested parasitism of ECS...
Article
Three new Peniophorella species (Hymenochaetales) growing on dead wood, are described and illustrated. Peniophorella aspersa was collected in Taiwan and mainland China, and characterized by minutely warted hymenial surface, well-developed subiculum, rare stephanocysts and cylindrical-suballantoid spores. Peniophorella crystallifera collected in mai...
Article
A new species of Athelia, A. termitophila, from Japan is described and illustrated on the basis of morphological and phylogenetic analyses. Basidiomes of this species are characterized by having hyphae sometimes with clamp connections at the septa, basidia without clamp connections at the basal septa, and ellipsoid to ovoid basidiospores measuring...
Article
We described the ectomycorrhizae (ECM) of the Japanese Lactarius section Deliciosi species L. akahatsu, L. hatsudake, L. laeticolor, and L. subindigo with the aim of promoting the use of mycorrhizae for taxonomy and expansion of available cultures. Lactarius tottoriensis (sect. Lactarius) was also included as a comparator. The ECM of the four speci...
Article
Taxonomic studies including morphological observations and phylogenetic analyses were conducted on Japanese “uragin-take”, an unidentified species from Amazonia, Brazil and their allies. Phylogenetic analyses using ITS, nrLSU and RPB2 regions revealed that “uragin-take”, Neofomitella polyzonata and the unidentified species formed a monophyletic cla...
Article
We induced basidioma formation of a fungus belonging to the Thelephoraceae that was isolated from the orchid Cephalanthera falcata. The mycobiont was isolated from root, cultured on modified Melin-Norkrans medium, and then inoculated onto fine roots of a Quercus serrata (Fagaceae) seedling. After observation of ectomycorrhiza formation, the Q. serr...
Article
Tricholoma foliicola was taxonomically reevaluated based on analyses of the holotype and newly collected materials. Basidiospores of T. foliicola were irregularly ellipsoid, showing a cyanophilic reaction with or without tubercles. Phylogenetic analyses of the internal transcribed spacer (ITS) and large subunit 28S regions of the fungal nuclear rib...
Article
Fruiting bodies of ectomycorrhizal fungi were collected from different areas of Tottori Prefecture, Japan, during 2011–2015, and 18 species were identified by morphological characteristics and molecular analysis. Volatile compounds were extracted with acetone from fruiting bodies, and after concentration, the aqueous residue was extracted with n-he...
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Most of lichens are formed by Ascomycota, less than 1% are lichenized Basidiomycota. The flora investigation of lichenized Ascomycota of South Korea has been well studied in the past three decades; however, prior to this study, none of basidiolichens was discovered. During the recent excursion, an unexpected clavarioid basidiolichen, Sulzbacheromyc...
Article
Tubulicium curvisporum sp. nov. frequently grows on the Japanese andromeda Pieris japonica on Honshu Island, Japan. Molecular phylogenetic analysis revealed that this species belongs to the genus Tubulicium, of the family Hydnodontaceae (Trechisporales). The present species is morphologically distinguishable from the other Tubulicium species, becau...
Article
The Entoloma clypeatum species complex, known as “Harushimeji” in Japan, associates with Rosaceae and Ulmaceae plant species. In this study, we successfully isolated cultures of this fungal group via basidiospore isolation from tentative four Harushimeji species using modified Norkrans's C (MNC) medium and MNC medium containing n-butyric acid. Colo...
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The ethyl acetate extract of the culture filtrate of Phlebia tremellosa promoted elongation of the lateral roots of lettuce seedlings at 250 µg/mL. We purified two compounds that promote root elongation by using activity-guided chromatographic fractionation. On the basis of spectroscopic analyses, these compounds were identified to be isolactarane...
Article
Melanoderma boninense is described and illustrated as a new species from the Bonin Islands, Japan, on the basis of morphological and phylogenetic investigations. This species is characterized by sessile basidiocarps with an ungulate pileus, a black crust on the pileus surface, pores 4–6/mm, a dimitic hyphal system comprising clamped generative hyph...
Article
Hydnum repandum and its relatives are gourmet edible ectomycorrhizal mushrooms. However, no reliable pure cultures have been reported in this genus. Here, we report for the first time the successful isolation of mycelial strains from basidiospores in the genus Hydnum. Basidiospores obtained from basidioma samples were aseptically inoculated onto mo...
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The climbing orchid Erythrorchis altissima is the largest mycoheterotroph in the world. Although previous in vitro work suggests that E. altissima has a unique symbiosis with wood-decaying fungi, little is known about how this giant orchid meets its carbon and nutrient demands exclusively via mycorrhizal fungi. In this study, the mycorrhizal fungi...
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Tyrosinase is the key enzyme that controls melanin formation in the human skin. We performed a screening of 96 extracts of mushroom cultures and fruiting bodies for examining their inhibitory activity against mushroom tyrosinase. The ethyl acetate extracts of culture filtrate of Neolentinus lepideus exhibited the strongest inhibitory activity. The...
Article
Amylostereum laevigatum has been reported from Japan growing on Cryptomeria japonica and Chamaecyparis obtusa. Using morphological and molecular data (internal transcribed spacer (ITS) nrDNA and rpb2 markers), we demonstrate that some specimens under A. laevigatum from Japan belong to A. orientale, a species described from China. Amylostereum orien...
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The Amazon Forest is a hotspot of biodiversity harboring an unknown number of undescribed taxa. Inventory studies are urgent, mainly in the areas most endangered by human activities such as extensive dam construction, where species could be in risk of extinction before being described and named. In 2015, intensive studies performed in a few locatio...
Article
The sequestrate (truffle-like) basidiomycete genera Rossbeevera, Chamonixia, and Octaviania are closely related to the epigeous mushroom genera Leccinum and Leccinellum. In order to elucidate the properties and placement of several undescribed sequestrate taxa in the group and to reveal the evolutionary history of Rossbeevera and its allies, we con...
Article
Native Trichoderma spp. were isolated from agricultural fields in several regions of Ecuador. These isolates were characterized via morphological observation as well as molecular phylogenetic analysis based on DNA sequences of the rDNA internal transcribed spacer region, elongation factor-1α gene and RNA polymerase subunit II gene. Fifteen native T...
Article
Dead wood is an important habitat for forest organisms, and wood decay fungi are the principal agents determining the dead wood properties that influence the communities of organisms inhabiting dead wood. In this study, we investigated the effects of wood decomposer fungi on the communities of myxomycetes and bryophytes inhabiting decayed logs. On...
Article
A new species of the genus Hydnum, H. minum, with whitish basidiomata, is described and illustrated from Japan based on morphological and phylogenetic analyses. This species is characterized by small basidiomata (1–2.5 cm in height), spinose hymenophores with small, conical to aciculate spines (0.5–1.7 mm in length, 150–250 μm in diameter), subclav...
Article
A new basidiolichen species, Lepidostroma asianum (Agaricomycetes, Lepidostromatales, Lepidostromataceae), is described based on basidiomata collected from red clay in southwestern Japan. This is the first report of a species in the genus Lepidostroma from Asia. The species is characterized by producing pale orange to reddish-orange, cylindrical to...
Article
Dactylosporina brunneomarginata sp. nov., belonging to the family Physalacriaceae (Agaricales) is described and illustrated. This fungus differs from previously described species of Dactylosporina macroscopically by its viscid pileus and stipe surface when wet, the lamellae with dark brown edges, and microscopically by its gloeocystidioid pileo-, c...
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A taxonomic study of poroid Asian species in the Auriculariales was conducted using phylogenetic and morphological methods. Phylogenetic analyses based on the LSU and ITS regions reveal that Elmerina was a polyphyletic genus. Moreover, E. hexagonoides collected from Malaysia and “E. hexagonoides” from Japan formed two distinct clades within a well-...
Article
Trichoderma eijii and T. pseudolacteum, are described here as new species from Japan. These species were isolated from decaying wood in the Tomakomai Experimental Forest in Hokkaido Prefecture and from bedlogs on shiitake mushroom (Lentinula edodes) farms, respectively. The species were characterized using a combined approach that included cultural...
Article
We analyzed the DNA sequences of four gene regions, 28S and 18S rDNA, the ITS region, and rpb2, to obtain a high-resolution phylogenetic tree of Dacrymycetes. In addition, we comparatively studied micro- and macromorphological characteristics of representative species. The traditional generic classification based on morphological characteristics wa...
Article
Volatiles produced by mycelia of mushrooms with aromatic odour were investigated for their antifungal activity against plant‐pathogenic fungi. The results of the screening of 23 species of basidiomycetes revealed that volatile substances from mycelia of Mycoleptodonoides aitchisonii (TUFC10099), an edible mushroom, strongly inhibited the mycelial g...
Article
During a biodiversity survey of Amazonian jelly fungi, we collected a unique dacrymycetous fungus. This fungus is characterized by stipitate, branched and multi-headed basidiocarps with fascicled marginal hyphae on the sterile parts of the basidiocarps and narrow cylindrical to navicular basidiospores. No dacrymycetous species with these morphologi...
Article
Fifty-one fungal isolates were screened for their biological pretreatment of bamboo culms (Phyllostachys pubescence) by enzymatic saccharification. These fungi were isolated from the interior of decayed bamboo culms or from basidiomata on bamboo culms. The white rot basidiomycete Punctularia sp. TUFC20056 and an unidentified basidiomycete TUFC20057...
Article
A new sequestrate (truffle-like) species, Rossbeevera yunnanensis, is described based on a collection from Chuxiong Prefecture, Yunnan Province, China. The species is morphologically characterized by its large, narrow, fusoid to fusiform basidiospores and remarkably thin peridium. Maximum likelihood and neighbor joining phylogenies of our nLSU rDNA...
Article
During an investigation of Hypocrea/Trichoderma species inhabiting mushroom bedlogs, we found five strains of an undescribed species from a culture collection. These were analyzed using a combined approach, including morphology of holomorph, cultural studies, and phylogenetic analyses of the rRNA gene cluster of the internal transcribed spacer regi...
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The sequestrate fungi of Japan, including truffle and truffle-like fungi, have not been well characterized but are potentially diverse. We investigated the diversity and phylogeny of Japanese Octaviania specimens using a multifaceted approach including scanning and transmission electron microscopy as well as analysis of nuclear ribosomal DNA (ITS a...
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During investigating of shiitake mushroom competitors, 289 isolates of Trichoderma spp. were collected from shiitake mushroom farms in different districts and the Forest Mushroom Research Center of Korea, among which 29 representative strains were selected. Based on the DNA sequences of the rpb2 and tef1 genes and the ITS rDNA, and their morphologi...
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Shiitake (Lentinula edodes) is the most economically important cultivated mushroom, but yields are impacted by its competitor, Trichoderma spp. We previously found two unidentified Trichoderma species growing in bedlogs and sawdust shiitake media in Korea. Here, we identify and re-describe those two species based on molecular sequence data, morphol...
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Karyological characteristics during basidiosporogenesis of Rhizopogon roseolus, a member of the hypogeous Agaricomycetes, were studied by light and transmission electron microscopy. More than 1000 tissue fragments of young basidiomata were stained with HCl-Giemsa and observed by a light microscopy to evaluate nuclear behavior. Basidium morphology i...
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Two species of the genus Ponticulomyces collected from Japan for the first time are described and illustrated. Ponticulomyces kedrovayae is characterized by its lamellae staining yellow when bruised and in age, stipe lacking an annulus and a pseudorhiza, scattered pileal hairs, and large amygdaliform basidiospores. It mainly occurs on dead wood of...
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An ionic liquid (IL) is a kind of salt that stays in a molten state even at room temperature. Since ILs do not vaporize even under vacuum conditions and show high ionic conductivity, they can be used in scanning electron microscopy (SEM) studies. The ultrastructural features of basidiospore ornamentation are considered to be important in the delimi...
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The tomato pathotype of Alternaria alternata (A. arborescens) produces the dark brown to black pigment melanin, which accumulates in the cell walls of hyphae and conidia. Melanin has been implicated as a pathogenicity factor in some phytopathogenic fungi. Here, two genes of the tomato pathotype for melanin biosynthesis, ALM1 and BRM2-1, which encod...
Article
The white rot fungus Trametes hirsuta produced ethanol from a variety of hexoses: glucose, mannose, cellobiose and maltose, with yields of 0.49, 0.48, 0.47 and 0.47 g/g of ethanol per sugar utilized, respectively. In addition, this fungus showed relatively favorable xylose consumption and ethanol production with a yield of 0.44 g/g. T. hirsuta was...
Article
One hundred and two basidiomycete strains (93 species in 41 genera) that prefer a soil environment were examined for screening of 1,1,1-trichloro-2,2-bis(4-chlorophenyl)ethane (DDT) biodegradation. Three strains within two litter-decomposing genera, Agrocybe and Marasmiellus, were selected for their DDT biotransformation capacity. Eight metabolites...
Article
Incipient decay of Quercus serrata by Lentinus edodes and its inhibition by Leptodontidium elatius were investigated by scanning electron microscopy. Rapid accumulation of L. edodes hyphae in earlywood vessels was a prerequisite to efficient decay of sapwood. In the early stages of decay, selective removal of lignin and other amorphous wall compone...
Article
A dematiaceous hyphomycete, Leptodontidium quercuum, was found to be an extremely deleterious antagonistic fungus for log cultivation of Lentinula edodes, or Shiitake. In response to the approach of Lentinula edodes hyphae, the antagonist formed distinct, narrow, and shiny black zone lines in outer sapwood, cambium, and inner bark regions of Quercu...
Article
A degradation experiment on dibenzo-p-dioxin (DD) and 2,7-dichlorodibenzo-p-dioxin (2,7-DCDD) was carried out using basidiomycetous fungi belonging to the genera Coprinus, Coprinellus, and Coprinopsis. Some species showed a high rate of decrease in DD for the 2-week test period. Among them, Coprinellus disseminatus showed the highest ability to dec...
Article
A new species, Cerinomyces aculeatus, is described and illustrated. The fungus is macroscopically characterized by having resupinate, effused, nongelatinous, and odontoid basidiomes and microscopically by hyphal pegs, dacrymycetaceous Y-shaped basidia and nodose-septate hyphae. Cerinomyces aculeatus differs from all previously described species in...
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The sequestrate genus Chamonixia has been shown to have affinities to the Boletales, in particular the genus Leccinum. Australasian and Japanese species of Chamonixia were examined using morphological and molecular (ITS and nLSU rDNA) data and found to also have affinities with Leccinum and Leccinellum, however they form a distinct clade separate f...
Article
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A new homobasidiomycete, Asterostroma boninense, was found in the Bonin (Ogasawara) Islands, a subtropical region in Japan. This species is morphologically characterized by having resupinate basidiomata, a monomitic (asterodimitic) hyphal system, simple septate generative hyphae, dextrinoid asterosetae, four sterigmate basidia, and subglobose, tube...
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A new anamorphic fungus, Beltraniella botryospora, is described and illustrated with line drawings and photographs. This fungus was isolated frequently from living and fallen leaves of Quercus acuta, but rarely or never from other evergreen oaks and Castanopsis sieboldii grown at the same investigation site, suggesting that this new fungus might ha...
Article
The white-rot basidiomycetes, Peniophora cinerea and Trametes suaveolens, can produce ethanol from hexoses. Although T. suaveolens produced negligible amounts of ethanol under aerobic conditions, P. cinerea produced ethanol under both aerobic and semi-aerobic conditions and assimilated glucose, mannose, fructose, galactose, sucrose, maltose and cel...
Article
A new homobasidiomycete, Asterostroma macrosporum, was found in mangrove forests of Iriomote Island, Japan. This species is morphologically characterized by having resupinate basidiomata, a monomitic (asterodimitic) hyphal system, simple septate generative hyphae, dextrinoid asterosetae, four sterigmate basidia and globose, tuberculate and amyloid...
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Species-specific identification of the major cooked and fresh poisonous mushrooms in Japan was performed using a real-time PCR system. Specific fluorescence signals were detected, and no nonspecific signals were detected. Therefore, we succeeded in developing a species-specific test for the identification of poisonous mushrooms within 1.5 h.
Article
The ultrastructure of developing basidiospores in Rhizopogon roseolus is described. When viewed in the fruiting body chamber using scanning electron microscopy, basidiospores appear narrowly ellipsoid and have smooth walls. Eight basidiospores are usually produced on the apex of each sterigma on the basidium. Transmission electron micrographs showe...
Article
Mycelial extracts (ethyl acetate and 70% ethanol) of 20 higher Basidiomycetes edible or medicinal mushrooms and culture media extracts (ethyl acetate and Butan-1-ol) were evaluated for in vitro anti-inflammatory activity using the cyclooxygenase-1 and -2 enzymes (COX-1 and -2). Generally, 70% ethanolic extracts showed lower inhibitory activity agai...
Article
The corticioid basidiomycete Peniophorella praetermissa has long been regarded as a morphologically variable species complex. An ITS-based phylogenetic study based on a worldwide sampling was carried out using parsimony and Bayesian inference. The resulting trees feature three major clades, further divided into well-supported subclades. These could...
Article
To obtain a homothallic mutant in Lentinula edodes, basidiospores derived from the common Bmut dikaryon (A1B1mut × A2B1mut) were treated with UV irradiation. Of a total of approximately 5000 monosporous cultures recovered, a single basidiospore isolate was found to produce the hyphae bearing clamp connections without mating. This mutant strain coul...
Article
Haloaleurodiscus gen. nov. (Homobasidiomycetes) is described from Japanese mangrove forests with one species H. mangrovei sp. nov. The genus is morphologically characterized by having resupinate basidioma, nodose-septate hyphae, sulphoaldehyde-positive gloeocystidia, dendrohyphidia and amyloid basidiospores with minute warts. These morphological fe...
Article
In order to monitor the basidiomycetous fungus Phlebia brevispora isolated from butt rot of Chamaecyparis obtusa (Japanese cypress) in 1997 in Nagasaki Prefecture, a sensitive polymerase chain reaction (PCR)-based assay was developed to specifically detect the fungus on-site. A species-specific primer for P. brevispora was derived from the internal...
Article
Fungi inhabiting Japanese pear were isolated from internal tissues of cv. Nijisseiki, and culture filtrates (CFs) of 100 isolates were evaluated for their inhibitory activity against infection by Alternaria alternata Japanese pear pathotype. CFs of 11 isolates inhibited lesion formation on the pear by the pathogen. Among these isolates, CFs of five...
Article
Sixteen species of corticioid fungi (Basidiomycota) were collected from mangrove forests in the islands of Iriomote and Okinawa, Japan. All the species are new records for the Japanese mangrove forests. Of these species, 6 species are newly reported from Japan: Cerocorticium molle, Gloeocystidiellum moniliforme, G. wakullum, Hyphoderma ayresii, Pha...
Article
Previous studies of morphological variation in the homobasidiomycete Hyphoderma setigerum have lead to suspicions of a species complex. This study explores variation in DNA sequences from the nuclear ribosomal ITS region of 45 specimens from America, Asia, and Europe in a phylogeographic context. Based on molecular analysis, morphological studies,...
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Ceriporia lacerata (Aphyllophorales, Basidiomycota) is described from a ripe basidiocarp successfully developed in a culture isolated from a white-rotted tree on Kyushu Island, Japan. Cultural characteristics, microscopical data and DNA sequencing are given as support for the generic position. A key to the Japanese species of Ceriporia is provided.
Article
 To identify a basidiomycetous fungus isolated from butt rot of Chamaecyparis obtusa, Japanese cypress, its cultural features were examined, and sequences of its nuclear ribosomal 18S and ITS1–5.8S–ITS2 regions were analyzed. In culture, this fungus is characterized by the occurrence of chlamydospores, blastoconidium-like cells, and clavate-to-spat...
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 Four corticioid fungi (Basidiomycota), collected from Tottori Prefecture, are reported as new records from Japan. They are Bulbillomyces farinosus, Melzericium rimosum, Sistotremella cystidiolophora, and Tubulicrinis orientalis. Their morphological descriptions, illustrations, and remarks based on the Japanese specimens are provided.
Article
One hundred thirteen corticioid species belonging to 46 genera (Aphyllophorales, Basidiomycotina) are reported based on the specimens collected in Sichuan Province, China, during the 1998-2000 Japan-China Joint Scientific Expedition. Among them, 40 species are new records from mainland China. For these species, taxonomically main characters and dis...
Article
Pseudolagarobasidium calcareum (Basidiomycotina, Corticiaceae s.l.) is newly reported for Japan, and its cultural characteristics are described for the first time. Seven of nine Japanese and Taiwanese specimens examined produce arthroconidia associated with the basidiomata. Variability in color of the hymenial surface is also observed among the spe...
Article
The pulmonary diseases caused by the Aspergillus species include invasive forms, for example, invasive pulmonary aspergillosis, chronic necrotizing pulmonary aspergillosis, and non-invasive pulmonary aspergillosis. Though these forms are defined pathologically by the presence of the Aspergillus species that invades the lung tissue, they are used as...
Article
This is the first clinical report of a case of pneumonia caused by Nocardia nova in Japan. A 52 year-old woman who had received steroids and cyclophosphamide for six years because of polymyositis was admitted to our hospital for further examination. On admission she had a mild cough, and her chest radiography and computed tomography revealed bilate...
Article
Bullous pemphigoid (BP) is an autoimmune disease frequently occurring in elderly persons. It has been reported that 92-kDa gelatinase released from eosinophils cleaves the extracellular domain of BP180 protein, suggesting a direct role of eosinophils in bulla formation in this disease. The expression of the high-affinity IgE receptor, Fc epsilon RI...
Article
A new hyphomycete, Eleutheromyces longispora, isolated from a decaying basidioma of Trametes versicolor is described. This fungus is characterized by the pycnidial conidia that are significantly longer than those of previously described species of the genus and possess apical-appendages with a swollen and slightly thick-walled basal part. On potato...
Article
Butt rot of Japanese cypress, Chamaecyparis obtusa, in three 25-year-old stands with 178, 70 and 45 trees caused 69.1%, 75.7% and 76.1% of the respective stands to rot. In the field survey, corticioid basidiocarps with yellowish hymenia were sometimes observed on the cut ends of trunks and cut surface of stumps of C. obtusa and a few species of har...