Mechanism of Stress Management in Bacteria During Inter-species Interactions

Sudharman, Sulal (2016) Mechanism of Stress Management in Bacteria During Inter-species Interactions. Masters thesis, Indian Institute of Science Education and Research Kolkata.

PDF (MS dissertation of Sulal S. (10MS95)) Sulal_thesis_-10MS95.pdf - Submitted Version Restricted to Repository staff only Download (2MB)

Abstract

Soil and water serves as the home for a number of organisms which comprises of both macroscopic and microscopic levels. These organisms compete and cooperate with each other in their niche. The world at microscopic level is complex and remarkable to study. At a given time with rich resources microbes are seen abundant but with time when the resources get limitedthey develop strategies to outcompete the other. They secrete a wide array of antibacterial compounds(like bacteriocins) when competing with other bacteria for the same resources. This work mainly investigates the interaction between two different bacterial species isolated from different niches i.e. Pseudomonassp(KPW1S1) and Bacillus cereus (MSM-S1), the former isolated from Kolkata port water and the later isolated from soil when grown together in laboratory conditions. Our experiment demonstrated how the growth of one species is inhibited by the influence of the other and the mechanism adopted by the later to cope with the newly introduced stress condition, ensuring its survival. This interactive phenomenon helps to understand how exquisitely organisms interact and adapt with each other, ensure its survival and how their numbers are maintained.

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