Open Access Peer-reviewed Research Article

Comparative assessment of exopolymer production and chemical characteristics of two environmental biofilm isolates of Pseudomonas aeruginosa

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Infrared spectra of the two exopolymers
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Submitted   Mar 19, 2020
Published   Apr 28, 2020
Issue    Vol 2 No 1 (2020)
DOI   10.25082/CR.2020.01.003

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Subba Rao Toleti corresponding author
Water & Steam Chemistry Division, BARC, Kalpakkam 603102, Tamil Nadu, India & Homi Bhabha National Institute, Mumbai 400094, India
Senthil Kumar
Safety Research Institute, IGCAR Campus, Kalpakkam 603102, Tamil Nadu, India & Homi Bhabha National Institute, Kalpakkam 603102, India
Sharat Chandra
Materials Science Group, Indira Gandhi Centre for Atomic Research, Kalpakkam 603102, Tamil Nadu, India & Homi Bhabha National Institute, Kalpakkam 603102, India

Abstract

Two Pseudomonas aeruginosa isolates from natural biofilms (marine and freshwater environment) were investigated for exopolymer (EPS) production and chemical characterization.  Both the isolates were categorized using molecular tools as P. aeruginosa species, The EPS production was distinct with various carbon and nitrogen sources, the average EPS yield by the two Pseudomonas strains was 55 µg ml-1.  Modelling was done to establish the relation between observed and predicted EPS yields. The chemical composition, FTIR and Raman spectroscopy analysis of the two EPS showed that carbohydrate content was more in marine strain, while protein content was relatively high in the freshwater strain. Thermo-gravimetric analysis of the two EPS showed endothermic decomposition. Biochemical study by gel permeation chromatography showed that the marine strain EPS is a highly glycosylated biomolecule, while the freshwater EPS is a weakly glycosylated biomolecule with molecular weights 140,000 and 300,000 Daltons respectively. The EPS produced by the two Pseudomonas isolates has implication in process and chemical industries.   

Keywords
bacteria, EPS, carbohydrate, protein, biofilm, biofouling, industries

Article Details

How to Cite
Toleti, S. R., Kumar, S., & Chandra, S. (2020). Comparative assessment of exopolymer production and chemical characteristics of two environmental biofilm isolates of Pseudomonas aeruginosa. Chemical Reports, 2(1), 132-143. https://doi.org/10.25082/CR.2020.01.003
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