Abstract
Ten thermophilic bacterial strains were isolated from manure compost. Phylogenetic analysis based on 16S rRNA genes and biochemical characterization allowed identification of four different species belonging to four genera: Geobacillus thermodenitrificans, Bacillus smithii, Ureibacillus suwonensis and Aneurinibacillus thermoaerophilus. PCR-RFLP profiles of the 16S-ITS-23S rRNA region allowed us to distinguish two subgroups among the G. thermodenitrificans isolates. Isolates were screened for thermotolerant hydrolytic activities (60–65°C). Thermotolerant lipolytic activities were detected for G. thermodenitrificans, A. thermoaerophilus and B. smithii. Thermotolerant protease, α-amylase and xylanase activities were also observed in the G. thermodenitrificans group. These species represent a source of potential novel thermostable enzymes for industrial applications.
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Acknowledgments
This work was supported through grants from NSERC. D.M.C. acknowledges the support of a PROTEO scholarship. Special thanks to Sandra Isabel for providing guidance in phylogenetic analysis, and to Dr Martin Kalmokoff (Agriculture Canada) for editorial review of the manuscript.
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Charbonneau, D.M., Meddeb-Mouelhi, F., Boissinot, M. et al. Identification of Thermophilic Bacterial Strains Producing Thermotolerant Hydrolytic Enzymes from Manure Compost. Indian J Microbiol 52, 41–47 (2012). https://doi.org/10.1007/s12088-011-0156-8
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DOI: https://doi.org/10.1007/s12088-011-0156-8