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Antimicrobial properties of cultivable bacteria associated with seaweeds in the Gulf of Mannar on the southeast coast of India

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Relation http://eprints.cmfri.org.in/11469/
https://www.ncbi.nlm.nih.gov/pubmed/27374804
 
Title Antimicrobial properties of cultivable bacteria associated
with seaweeds in the Gulf of Mannar on the southeast coast
of India
 
Creator Thilakan, Bini
Chakraborty, Kajal
Chakraborty, Rekha D
 
Subject Bioactive compound
Seaweed
Microbiology
 
Description In this study, 234 bacterial strains were isolated from 7 seaweed species in the Gulf of Mannar on the
southeast coast of India. The strains having consistent antimicrobial activity were chosen for further studies, and this
constituted about 9.8% of the active strains isolated. Phylogenetic analysis using 16S rDNA sequencing with the help of
classical biochemical identification indicated the existence of 2 major phyla, Firmicutes and Proteobacteria. Antimicrobial
activity analysis combined with the results of amplifying genes encoding for polyketide synthetase and nonribosomal
peptide synthetase showed that seaweed-associated bacteria had broad-spectrum antimicrobial activity. These epibionts
might be beneficial to seaweeds by limiting or preventing the development of competing or fouling bacteria.
Phylogenetic analysis of ketosynthase (KS) regions with respect to the diverse range of KS domains showed
that the KS domains from the candidate isolates were of Type I. The bacterial cultures retained their antimicrobial
activities after plasmid curing, which further suggested that the antimicrobial activity of these
isolates was not encoded by plasmid, and the genes encoding the antimicrobial product might be present
within the genome. Seaweed-associated bacteria with potential antimicrobial activity suggested that the
seaweed species are an ideal ecological niche harboring specific bacterial diversity representing a largely
underexplored source of antimicrobial secondary metabolites.
 
Date 2016
 
Type Article
PeerReviewed
 
Format text
 
Language en
 
Identifier http://eprints.cmfri.org.in/11469/1/Antimicrobial%20properties%20of%20cultivable%20bacteria%20associated%20with%20seaweeds_Canadian%20Journal%20of%20Microbiology_2016_Kajal%20Chakraborty.pdf
Thilakan, Bini and Chakraborty, Kajal and Chakraborty, Rekha D (2016) Antimicrobial properties of cultivable bacteria associated with seaweeds in the Gulf of Mannar on the southeast coast of India. Canadian Journal of Microbiology, 62. pp. 668-681.