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Mutual Effects in Vitro of Micro-Organisms Isolated from Tree Seedlings, Nursery Soil, and Forests

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Selected isolates of actinomycetes and fungi imperfecti isolated from tree seedlings, nursery soils, and basidiomycetes isolated from fruiting bodies were paired on cornmeal agar, and the mutual effects recorded. In the majority of 1205 different combinations, antagonism was present, but in many there were no mutual effects. Stimulation took place very seldom. The most common effect was the inhibition of growth for a distance of 0 to 20 mm. Very often the growth of the colony was inhibited on contact or soon thereafter. Lysis was observed in several cases. Although antagonism or sensitivity to antagonism was typical of many isolates, it was lacking in certain combinations of each isolate. Isolates of the following genera were among those usually exhibiting strong antagonism: Armillaria, Bacterium, Cylindrocarpon, Gliocladium, Penicillium, Russula, Streptomyces, Suillus, and Trichoderma. Many species of Fusarium, Gliocladium and Streptomyces were the most insensitive isolates and several basidiomycete and phycomycete species the most sensitive ones.

Document Type: Journal Article

Affiliations: Forest Entomology and Pathology Branch, Dept. of Forestry, Ottawa, Canada

Publication date: 1965-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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