Studies on Molecular Mechanism of Intra-specific Interactions in Bacteria

Chowdhury, Subhankar (2015) Studies on Molecular Mechanism of Intra-specific Interactions in Bacteria. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Subhankar Chowdhury) Subhankar_Chowdhury_13IP011.pdf - Submitted Version Restricted to Repository staff only Download (868kB)

Abstract

Cell–cell interactions are a feature that is common to all living systems. Bacteria interact with each other either in a cooperative way or compete with each other to gain better fitness. Different species of bacteria cooperate or compete to perform activities such as degradation of nutrients or metabolites, chemical warfare and signalling etc. Intra-specific interaction is a phenomenon where individuals of same species interact with each other. Laboratory experiments with environmental isolates of Bacillus cereus have revealed facts which decipher some intrinsic mechanism of intra-specific interaction. One growing colony of B.cereus inhibits the growth of other colonies of B.cereus in its vicinity. Along with that, few other species of bacteria were also found to exhibit the same phenomenon. To investigate the mechanism of these competitive interactions between sibling bacterial colonies, several genes have been identified which are likely to play crucial roles in mediating such rivalry between sibling colonies.

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