Journal
CANADIAN JOURNAL OF MICROBIOLOGY
Volume 61, Issue 5, Pages 327-334Publisher
CANADIAN SCIENCE PUBLISHING, NRC RESEARCH PRESS
DOI: 10.1139/cjm-2014-0704
Keywords
Listeria monocytogenes; Bacillus subtilis; coculture biofilms; rhamnose; population dynamics; metabolic gene expression
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Funding
- Science and Engineering Research Board - Department of Science and Technology, Government of India
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Coculture communities of microbes are more realistic and common in nature than in laboratory-grown pure cultures. In a mixed community, when resources with a potential role in growth are shared, conflict (as a consequence of competition) or cooperation is certain. In our study, this situation of conflict and cooperation was explored to understand the population dynamics and community behavior of Listeria monocytogenes. The social behavioral response of L. monocytogenes to the presence of Bacillus subtilis was studied in terms of divergence in gene expression of L. monocytogenes. It is evident from the results that social behavior of L. monocytogenes changes from competition for survival in broth to cooperation and coexistence in biofilm. Furthermore, the gene expression pattern is clearly indicative of L. monocytogenes switching from aerobic to fermentative metabolism in broth and biofilm conditions, respectively.
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