Biological characteristics and molecular phylogeny of <i>Sarcomyxa edulis</i> comb. nov. and <i>S. serotina</i>

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  • SAITO Teruaki
    Graduate School of Agriculture and Life Science, Hirosaki University
  • TONOUCHI Akio
    Graduate School of Agriculture and Life Science, Hirosaki University
  • HARADA Yukio
    Graduate School of Agriculture and Life Science, Hirosaki University

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  • ムキタケ<i>Sarcomyxa edulis</i> comb. nov. とオソムキタケ （新称） <i>S. serotina</i> の生物学的特徴と分子系統解析
  • ムキタケSarcomyxa edulis comb. nov.とオソムキタケ(新称)S. serotinaの生物学的特徴と分子系統解析
  • ムキタケ Sarcomyxa edulis comb. nov.ト オソムキタケ(シンショウ)S. serotina ノ セイブツガクテキ トクチョウ ト ブンシ ケイトウ カイセキ

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<p> Fruiting bodies of the edible mushroom Sarcomyxa serotina (Mukitake) were collected from the Aomori Prefecture, Japan, between 2011 and 2013 and classified into two types based on the color of the pileal surface: yellow and green. Morphological and phylogenetic analyses and mating tests were performed to assess relationships between the two types of S. serotina. Although the S. serotina types shared some morphological characteristics, there were also many differences, particularly in the color of the pilei, surface structures of the stipes, microscopic features of the pilei and lamellae, and the size of the basidiospores. Molecular phylogenetic analyses based on the sequence of the D1/D2 region of the 28S rRNA gene showed that the two types were phylogenetically related, but of independent lineages. The yellow type formed a clade with Panellus edulis, whereas the green type formed a clade with S. serotina. P. edulis was distant from Panellus stipticus, the type species of the genus Panellus. Mating tests showed that the haploid mycelia of the yellow type were incompatible with those of the green type. Based on these results, we proposed the new combination, Sarcomyxa edulis (Y.C. Dai, Niemelä & G.F. Qin) T. Saito, A. Tonouchi & Y. Harada, comb. nov. to the yellow type (for which the name Mukitake can be retained). Moreover, the green type was identified as S. serotina and identified by the new Japanese name Osomukitake.</p>

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