Abstract

Addition of pure culture sclerotia of Sclerotium cepivorum to unsterile soil resulted in increases in bacterial populations. Increases in respiration also occurred in the presence of sclerotial exudates. Bacterial stimulation could not be observed in sections produced from resin impregnated soil sclerotia mixtures but was easily seen by placing groups of sclerotia or exudate of sclerotia on agar plates seeded with Bacillus subtilis. Stimulation of bacteria in soil and on agar plates was due to the leakage of substances from the sclerotia.

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