著者

Wataru Aoki Naoki Endo Shuji Ushijima Hiroyuki Nagai Tetsuro Ito Masaki Fukuda Akiyoshi Yamada

出版者

The Mycological Society of Japan

雑誌

Mycoscience (ISSN:13403540)

巻号頁・発行日

pp.MYC548, (Released:2021-09-08)

被引用文献数

5

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“Kakishimeji” identified as Tricholoma ustale and belonging to Tricholoma sect. Genuina is a common poisonous mushroom in Japan. Kakishimeji contains the toxic compound ustalic acid and causes digestive trouble. However, this fungus is consumed in some regions of Japan without any digestive issues. We clarified the probable species complex of Kakishimeji based on a phylogenetic analysis. We collected 89 basidioma specimens of Kakishimeji and related species from various forest sites in Japan and conducted phylogenetic analyses using 7 nuclear and mitochondrial gene sequences. Kakishimeji was found to consist of four distinct phylogenetic clades based on all DNA regions tested. Of these, two clades included European T. stans and T. albobrunneum type specimens. Another two clades consisted of sister clades to T. pessundatum and T. ustaloides. In addition, all four phylogenetic clades of Kakishimeji had different spore and basidium sizes. Therefore, we regarded the latter two clades as two new Tricholoma species: T. kakishimeji and T. kakishimejioides.

著者

Wataru Aoki Naoki Endo Shuji Ushijima Hiroyuki Nagai Tetsuro Ito Masaki Fukuda Akiyoshi Yamada

出版者

The Mycological Society of Japan

雑誌

Mycoscience (ISSN:13403540)

巻号頁・発行日

vol.62, no.5, pp.307-321, 2021-09-20 (Released:2021-09-20)

参考文献数

60

被引用文献数

2 5

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“Kakishimeji” identified as Tricholoma ustale and belonging to Tricholoma sect. Genuina is a common poisonous mushroom in Japan. Kakishimeji contains the toxic compound ustalic acid and causes digestive trouble. However, this fungus is consumed in some regions of Japan without any digestive issues. We clarified the probable species complex of Kakishimeji based on a phylogenetic analysis. We collected 89 basidioma specimens of Kakishimeji and related species from various forest sites in Japan and conducted phylogenetic analyses using 7 nuclear and mitochondrial gene sequences. Kakishimeji was found to consist of four distinct phylogenetic clades based on all DNA regions tested. Of these, two clades included European T. stans and T. albobrunneum type specimens. Another two clades consisted of sister clades to T. pessundatum and T. ustaloides. In addition, all four phylogenetic clades of Kakishimeji had different spore and basidium sizes. Therefore, we regarded the latter two clades as two new Tricholoma species: T. kakishimeji and T. kakishimejioides.

著者

Shuji Ushijima Eiji Nagasawa Naoki Endo Akiyoshi Yamada

出版者

The Mycological Society of Japan

雑誌

Mycoscience (ISSN:13403540)

巻号頁・発行日

vol.62, no.4, pp.233-238, 2021-07-20 (Released:2021-07-20)

参考文献数

14

被引用文献数

2

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A novel species of Tricholoma section Tricholoma, namely, T. olivaceonigrum, is described and illustrated based on samples found in an oak woods dominated by Quercus myrsinifolia, an evergreen oak, in Tottori Prefecture, western Japan. It is characterized by a conic-umbonate, dark-greenish olivaceous pileus with blackish innate fibrils; a whitish silky-fibrillose stipe, often faintly tinted pale yellow and with a narrowed subpointed base; subglobose to broadly elliptic spores; and fruiting in early winter. Phylogenetic analysis targeting the internal transcribed spacer region of the ribosomal RNA gene revealed that T. olivaceonigrum forms a well-supported clade sister to T. portentosum. Other morphologically and phylogenetically closely related species of the section Tricholoma are discussed.

著者

Akihiko Kinoshita Kohei Yamamoto Toshiyuki Tainaka Toshifumi Handa Akiyoshi Yamada

出版者

The Mycological Society of Japan

雑誌

Mycoscience (ISSN:13403540)

巻号頁・発行日

vol.63, no.1, pp.26-32, 2022-01-20 (Released:2022-01-20)

参考文献数

24

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We describe a new truffle species, Tuber torulosum, based on molecular and morphological analyses. This species forms a single globose ascospore per ascus, pale yellow in color, as do Japanese T. flavidosporum and Chinese T. turmericum and T. xanthomonosporum in the Japonicum clade of the Tuber phylogeny. However, it can be distinguished from them microscopically by its whitish tomentose mycelium that partially covers the ascoma surface and the mesh size of its spore ornamentation. Cystidia are moniliform and yellowish to reddish. Molecular phylogenetic analysis using the internal transcribed spacer and partial large subunit regions of ribosomal DNA also supports T. torulosum as a distinct species. On the basis of our results, we provide a key to species in the Japonicum clade.

著者

Wakana Ogawa Naoki Endo Yumi Takeda Miyuki Kodaira Masaki Fukuda Akiyoshi Yamada

出版者

The Mycological Society of Japan

雑誌

Mycoscience (ISSN:13403540)

巻号頁・発行日

vol.60, no.1, pp.45-53, 2018 (Released:2023-03-07)

被引用文献数

11

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Species of fleshy yellow Cantharellus are known as chanterelles, which are among the most popular wild edible mycorrhizal mushrooms in the world. However, pure culture isolates of Cantharellus are rare. We report an efficient isolation technique of the Japanese golden chanterelle, Cantharellus anzutake, from its ectomycorrhizal root tips. Field-sampled fresh ectomycorrhizal root tips of C. anzutake on various hosts such as pines, spruce, and oaks were vortexed with 0.005% Tween 80 solution, surface sterilized with 1% calcium hypochlorite solution, rinsed with sterilized distilled water, and placed on modified Norkrans’ C (MNC) agar plate medium. Most ectomycorrhizal root tips of C. anzutake produced yellowish mycelial colonies within a few months. In contrast, tissue isolation from basidiomata provided limited cultures of C. anzutake but much contamination of bacteria and molds, even on media that contained antibiotics. The established C. anzutake cultures had clamp connections on the hyphae and contained intracellular oily droplets. These cultured isolates were identified as C. anzutake by sequence analysis of the rRNA internal transcribed spacer (ITS) region and translation elongation factor EF1-alpha (tef-1) genes.