1990 Fiscal Year Final Research Report Summary
Taxonomic Reassessment of Armillariella Mellea in Japan
| Project/Area Number |
63560155
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
林学
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| Research Institution | The Japan Kinoko Research Center Foundation |
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Principal Investigator |
NAGASAWA Eiji The Japan Kinoko Res. Ctr. Foundation, The Tottori Mycol. Inst., Head of Laboratory, 菌蕈研究所, 室長 (70088839)
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| Co-Investigator(Kenkyū-buntansha) |
MAEKAWA Nitaro The Japan Kinoko Res. Ctr. Foundation The Tottori Mycol. Inst., Research Scienti, 菌蕈研究所, 研究員 (00142638)
KOMATSU Mitsuo The Japan Kinoko Res. Ctr. Foundation The Tottori Mycol. Inst., Chief of Section, 菌蕈研究所, 研究部長 (60088846)
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| Project Period (FY) |
1988 – 1990
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| Keywords | Armillariella mellea / Armillaria mellea / Root rot / Armillaria / Intercompatibility / Taxonomy |
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| Research Abstract |
Mating intercompatibility and morphological, ecological, and cultural characters were studies on Armillariella mellea (= Armillaria mellea) sensu lato in Japan to clarify its taxonomy. Mating tests with monosporous isolates obtained from 61 basidiocarps showed that the Japanese "A. mellea" is composed of at least six intersterile groups (tentatively designated as A, B, C, D, E, and AM, respectively). They were morphologically distinguishable each other. The presence or absence of clamp-connections at the base of basidium, nature of scales on the pileus, habit of the basidiocarp, nature of the annulus, and color of the pileus were found to be primary significant in separating the intersterile groups morphologically. Ecological characters such as the fruiting season, habitat, and substrate seemed to be distinctive in group A, group C, and group AM. In cultures of diploid isolates belonging to each group (on PDA and 2% MEA, at 25 C in the darkness, in 30 days), group AM showed characteristic gross morphology of colony on both PDA and MEA and were easily distinguished from other groups in this character. Based on morphological and ecological characters, group AM and group C were identified as Armillaria mellea (Vahl : Fr.) Kummer s. str. and A. ostoyae (Romagnesi) Herink, respectively. Group B and group E were considered to be a new species, respectively. Nomenclature of group A and group D remained uncertain, although the former and the latter are similar to A. lutea Gillet and A. cepistipes Velenovsky, respectively.
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