Production of bacteriolytic enzymes by mycoparasitic Trichoderma strains |
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Authors: | Manczinger László Molnár Annamária Kredics László Antal Zsuzsanna |
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Affiliation: | (1) Department of Microbiology, University of Szeged, P.O. Box 533, H-6701 Szeged, Hungary;(2) Microbiological Research Group, Hungarian Academy of Sciences and University of Szeged, P.O. Box 533, H-6701 Szeged, Hungary |
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Abstract: | Eighteen mycoparasitic Trichoderma strains were tested for their ability to degrade heat-inactivated Bacillus cereus var. mycoides, B. megaterium, B. subtilis, Escherichia coli, Micrococcus luteus, Pseudomonas aeruginosa and Serratia marcescens cells. The non-inductive and inductive ferment broths of five strains with good degrading abilities towards B. subtilis were investigated for specific degrading enzyme activities. In addition to trypsin- and chymotrypsin-like protease activities, -1,4-N-acetyl-glucosaminidase (NAGase) was also secreted. Strain Trichoderma harzianum T19 had the most outstanding degrading abilities. The extracellular degrading enzymes of this strain were separated on a Sephadex G-150 column, and their preliminary characterization was performed. The results demonstrated that muramidase-like activities are present in the ferment broth of this T. harzianum strain. |
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Keywords: | Bacteria biocontrol extracellular enzymes gel filtration chromatography muramidase Trichoderma |
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