Letter | Published:

Bacterial Metabolites trigger Sporophore Formation in Agaricus bisporus

Naturevolume 222page984 (1969) | Download Citation



THE beneficial effect of one fungus on another was first reported by Heald and Pool1 and has since been noted frequently. It was soon discovered that the contaminating organism supplied growth factors which the other organism failed to synthesize. Agaricus bisporus produces abundant sporophores in natural soil but not in aseptic environments. This suggests that certain microorganisms in soil trigger the formation of sporophores of A. bisporus. Fungi, bacteria, actinomycetes and yeasts were therefore isolated from the test soil and the role of these in the formation of sporophores was studied. It was interesting to find that only the presence of certain bacteria stimulated the formation of sporophores of A. bisporus. Using these bacteria or their metabolite(s), the production of mature sporophores of A. bisporus was achieved for the first time in aseptic environments.

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  1. 1

    Heald, F. D., and Pool, V. W., Rep. Nebraska Agric. Exp. Station, 96, 185 (1908).

  2. 2

    Lochhead, A. G., Canad. J. Res., 18, 42 (1940).

  3. 3

    Zentmyer, G. A., Science, 150, 1178 (1965).

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  1. Department of Fisheries and Forestry, PO Box 490, Sault Ste. Marie, Ontario

    • J. Y. PARK
    •  & V. P. AGNIHOTRI


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