The effect of a soil extract on the development of Bacillus thuringiensis and on its synthesis of an insecticidal endotoxin

Dregval, O.A.; Cherevach, N.V.; Andrienko, O.E.; Vinnikov, A.I.

Mikrobiolohichnyi Zhurnal 61(4): 40-44

1999


ISSN/ISBN: 0201-8462
PMID: 10565149
Document Number: 503352
Selection of effective and inexpensive nutrient medium for cultivation of entomopathogenic bacteria Bacillus thuringiensis was carried out. The medium with molasses , corn extract and mineral salts has been chosen. Addition of a soil extract to the medium enhanced growth of microorganisms, increased the rate of culture development, the yield of spore-crystalline material and quantity of synthesized endotoxin. Apparently the strengthening effect belongs to humic substances contained in the soil extract.

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