Common occurrence of an antimicrobial (oxalato)aluminate complex in active mycorrhizal zones of Tricholoma matsutake

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  • NISHINO Katsutoshi
    Graduate School of Biostudies, Kyoto University, Kyoto, Kyoto 606-8502, Japan
  • YAMAGUCHI Muneyoshi
    Forestry and Forest Products Research Institute, Forest Research and Management Organization, Tsukuba, Ibaraki 305-8687, Japan
  • FUJITA Toru
    Kyoto Prefectural Agriculture, Forestry and Fisheries Technology Center, Kameoka, Kyoto 621-0806, Japan
  • AZUMA Tomonori
    Hokkaido Research Organization Forest Products Research Institute, Asahikawa, Hokkaido 071-0198, Japan
  • GISUSI Seiki
    Hokkaido Research Organization Forest Products Research Institute, Asahikawa, Hokkaido 071-0198, Japan
  • NARIMATSU Maki
    Iwate Prefectural Forestry Technology Center, Yahaba, Iwate 028-3623, Japan
  • YAMADA Akiyoshi
    Faculty of Agriculture, Shinshu University, Minami-minowa, Nagano 399-4598, Japan
  • HIRAI Nobuhiro
    Graduate School of Agriculture, Kyoto University, Kyoto, Kyoto 606-8502, Japan

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Other Title
  • 抗菌物質・シュウ酸アルミニウムのマツタケシロにおける普遍的存在
  • コウキン ブッシツ ・ シュウサン アルミニウム ノ マツタケシロ ニ オケル フヘンテキ ソンザイ

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Abstract

Tricholoma matsutake forms a fairy ring, and the area it encloses is called “shiro” in Japanese. The (oxalato)aluminate complex is an antimicrobial substance that was isolated from a shiro front, an active mycorrhizal zone, in symbiosis with Japanese red pine at Sakai (Kyoto). This complex may expel soil microorganisms from the shiro front in conjunction with the outward extension of the shiro. In order to confirm the common occurrence of the (oxalato)aluminate complex in shiros, we investigated whether it was present in shiros at Nishiokoppe (Hokkaido), Iwate (Iwate), and Ooshika and Shiojiri (Nagano) in the fruiting season. The host plants for shiros were Japanese red pine at Iwate and Shiojiri, Sakhalin fir at Nishiokoppe, and southern Japanese hemlock at Ooshika. The complex was detected in all active mycorrhizal zones of the shiros examined, and its concentration strongly correlated with mycelial density, antimicrobial activity, and pH. These results demonstrated that the (oxalato)aluminate complex is common to shiros of T. matsutake with different host plants.

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