Canadian Forest Service Publications

Growth inhibition of selected fungal and bacterial species isolated from the forest environment by Bacillus thuringiensis variety kurstaki. 1992. Bourque, S.N.; Perry, D.F.; Lavoie, M.C. Microbiology 69: 223-232.

Year: 1992

Issued by: Laurentian Forestry Centre

Catalog ID: 16452

Language: English

Availability: PDF (request by e-mail)

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The antimicrobial substance produced by strain HD-1 of Bacillus thuringiensis var. kurstaki has a large spectrum of activity inhibiting the growth of sixteen of the twenty bacterial strains and six of the seven fungal strains isolated from forest environments where B. thuringiensis is regularly applied. This inhibitory substance, of low molecular weight (between 1 and 8 kD), was sensitive to a proteolytic enzyme (proteinase K) and thermoresistant (30 min, 60°C). The activity of the crude supernatant culture was stable for 2 months. These results suggest that the application of B. thuringiensis preparations may influence the microbial ecology of the soil.