Effect of Acids on the Growth and Germination of Armillaria mellea.
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The effect of acids on the germination and growth of the fungus Armillaria mellea was investigated to clarify the relationship between acid deposition and damage to forest by the fungus. The optimum pH for the growth of the fungal hyphae was 6-7. The fungus did not grow at a pH of less than 2.5, but it was relatively acid tolerant and grew within a pH range of 3-4. The optimum pH for germination of the spores was 6-6.5, but no germination was observed at a pH of less than 3. On the other hand, the pH range for germination of the fungus in the presence of soil microorganisms was 4-4.5, and no spores germinated at a pH of more than 5 as a result of bacterial growth. These findings suggest that the increase of Armillaria mellea is favored by acid conditions in the natural environment where the fungus competes with other microorganisms.
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社団法人 環境科学会 | 論文
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