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Production of peptidic antimicrobials by bacterial populations from diverse coastal habitats of Goa, India

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Title Production of peptidic antimicrobials by bacterial populations from diverse coastal habitats of Goa, India
 
Creator Naik, P G
Muraleedharan, U D
 
Subject Antimicrobial activity
Bacterial isolates
Peptidic antimicrobials
Salinity
 
Description 292-299
With conventional antibiotics rapidly losing their efficacy, marine microorganisms found in diverse salinity conditions
are being explored for new antibacterial agents. Salinity is a major contributing factor to the distribution of biota in aquatic
systems, and little is known about the production of antimicrobials by microbial communities in response to stressful
environmental conditions. This work adds to the comprehension of bacterial abundance in estuarine and coastal beach
waters of Goa and population structuring concerning their antimicrobial activity as specifically conferred by antimicrobial
peptides. Total viable counts indicated higher bacterial load in estuarine water environments than in the higher salinity
waters, suggesting a role of salinity variation as a driver of community composition in these habitats. In total, 82 bacterial
isolates were selected, and the overall proteinaceous content in their exudates were screened for antimicrobial activity
against Salmonella typhimurium (MTCC 91), Staphylococcus aureus (MTCC 3160), Escherichia coli (MTCC 443),
Candida albicans (MTCC 227) and Aeromonas hydrophila (MTCC 1739), by the agar well diffusion method. Of these, 51.8
% showed activity against S. typhimurium, 30.3 % against S. aureus, 13.9 % against E. coli, 8.8 % against C. albicans, and
7.5 % against A. hydrophila. Compared with estuarine bacteria, those from more saline waters showed higher production of
potent antimicrobial peptides, which were probably used to counter the high competition for resources. Such sites could,
therefore, be potential niches for bioprospecting of microbes producing bacteriocin-like compounds.
 
Date 2024-02-27T07:00:44Z
2024-02-27T07:00:44Z
2024-02
 
Type Article
 
Identifier 2582-6727 (Online); 2582-6506 (Print)
http://nopr.niscpr.res.in/handle/123456789/63465
https://doi.org/10.56042/ijms.v52i06.8350
 
Language en
 
Publisher NIScPR-CSIR,India
 
Source IJMS Vol.52(06) [June 2023]