Exopolysaccharide (EPS) Producing Isolates from Sugarcane Field Soil and Antibacterial
Activity of Extracted EPSs
Kruti K Patel, Firdosh Shah and Mitesh Dwivedi*
C. G. Bhakta Institute of Biotechnology, Faculty of Science, Uka Tarsadia University, Gujarat, India
*Corresponding Author: Mitesh Dwivedi, C. G. Bhakta Institute of Biotechnology, Faculty of Science, Uka Tarsadia University, Gujarat,
India.
Received:
January 30, 2018; Published: March 07, 2018
DOI: 10.31080/ASMI.2018.01.0032
Microbial exopolysaccharides (EPSs) are reported to possess unique physiological activities including anti-microbial, anti-tumor,
and anti-inflammatory. The antimicrobial activities of EPS could be used as a potential source for the development of antimicrobial
drugs and may have various industrial, pharmaceutical and medical applications. The present study was aimed to isolate efficient
EPS producing bacteria from sugarcane field soil and to evaluate the antibacterial activity of EPSs. Total 9 EPS producing isolates
were obtained out of which, KPEP3 and KPEP4 were found to be higher producers of EPS. The isolates were able to grow at different
pH but EPS production was higher at pH 6. The maximum carbohydrate content was found in KPEP3 and minimum protein content
was found in KPEP4 suggestive of their probable use in medicine due to less immunogenicity. The evaluation of antibacterial activity
of EPS suggested that all 4 test microorganisms (
E. coli, B. cereus, B. subtilis
and
V. cholerae
) showed sensitivity against EPSs but the
sensitivity varied from one microorganism to another. The KPEP3 and KPEP4 EPSs were found to exert higher antibacterial activity
on diverse test organisms. EPSs concentration of 7.5 mg/ml was found to be effective for antibacterial activity. The MIC values of
EPSs suggested that they can be used at lower concentration to inhibit test organisms. The biochemical characterization indicated
that these isolates may belong to genera:
Bacillus
and
Pseudomonas
. Further research is necessary to elucidate the composition and
efficacy of the EPSs by using
in vitro
and
in vivo
animal model studies.
Keywords: Exopolysaccharides (EPSs); Bacterial EPS; Antibacterial Activity
-
Staudt C.,
et al.
“Volumetric measurements of bacterial cells
and extracellular polymeric substance glycoconjugates in bio-
films”.
Biotechnology and Bioengineering
88.5 (2004): 585-
592.
-
Knoshaug EP.,
et al.
“Growth associated exopolysaccharide ex
-
pression in Lactococcus lactis subspecies cremoris Ropy352”.
Journal of Dairy Science
83.4 (2000): 633-640.
-
Rehm BH. “Bacterial polymers: biosynthesis, modifications
and applications”.
Nature Reviews Microbiology
8.8 (2010):
578-592.
- Linton CM. “Radiation and diffraction of water waves by a
submerged sphere in finite depth”.
Ocean Engineering
18.1-2
(1991): 61-74.
- Sutherland IW. “Novel and established applications of micro-
bial polysaccharides”.
Trends in Biotechnology
16.1 (1998):
41-46.
-
Flemming H C and Wingender J. “Relevance of microbial ex
-
tracellular polymeric substances (EPSs)-Part I: Structural and
ecological aspects”.
Water Science and Technology
43.6 (2001):
1-8.
- Vijayabaskar P.,
et al.
“Quantification and characterization of
exopolysaccharides from Bacillus subtilis (MTCC 121)”.
Ad
-
vances in Biological Research
5.2 (2011): 71-76.
-
Gerhardt P.,
et al
. “Methods for General and Molecular Bacte-
riology”. Washington, DC: American Society for Microbiology
(1994) 518.
- Frølund B.,
et al.
“Extraction of extracellular polymers from ac-
tivated sludge using a cation exchange resin”.
Water Research
30.8 (1996): 1749-1758.
-
Lowry O.H.,
et al.
“Protein measurement with the Folin phenol
reagent”.
Journal of Biological Chemistry
193.1 (1951): 265-
725.
-
Raihan S.,
et al.
“Production of exopolysaccharide by an in-
digonous soil isolate”.
Journal Islamic Academy Sciences
5.4
(1992): 282-285.
-
Bauer A.,
et al
. “Antibiotic Susceptibility Testing by a Standard-
ized Single Disk Method”.
American Journal of Clinical Pathol-
ogy
36.3 (1966): 493-496.
-
Chawla PR. “Microbial cellulose: fermentative production and
applications”.
Food Technol Biotechnology
47.2 (2009): 107-
124.
-
Rehm HYU. “Microbial production of biopolymers and poly
-
mer precursors: applications and perspectives”.
Caister Aca-
demic Press
(2009).
- Fialho AM. “Occurrence, production, and applications of gel-
lan: current state and perspectives”.
Applied Microbiology and
Biotechnology
79.6 (2008): 889-900.
- Kumar AS. “Bacterial exopolysaccharides -a perception”.
Jour
-
nal of Basic Microbiology
47 (2007): 103-117.
- Ullrich THJ. “Bacterial Polysaccharides: Current Innovations
and Future Trends”.
Caister Academic Press
(2009).
- Majolagbe ON.,
et al
. “Study on the Antibacterial Activity of
Exopolysaccharides of Lentinus subnudus Using Swiss Albi
-
no Rats as Animal Model”.
American-Eurasian Journal of Sci-
entific Research
8.1 (2013): 47-52.
- Li S.,
et al.
“Antioxidant and antibacterial activities of exo-
polysaccharides from Bifidobacterium bifidum WBIN03 and
Lactobacillus plantarum R315”.
Journal of Dairy Science
97.12
(2014): 7334-7343.
-
Onbasli D and Aslim B. “Determination of antimicrobial ac-
tivity and production of some metabolites by Pseudomonas
aeruginosa B1 and B2 in sugar beet molasses”.
African Journal
of Biotechnology
7.24 (2008): 4614-4619.
-
Freitas F.,
et al.
“Characterization of an extracellular polysac-
charide produced by a Pseudomonas strain grown on glyc-
erol”.
Bioresource Technology
100.2 (2009): 859-865.
-
Freitas F.,
et al.
“Fucose-containing exopolysaccharide pro-
duced by the newly isolated Enterobacter strain A47 DSM
23139”.
Carbohydrate Polymers
83.1 (2011): 159-165.
-
Shankar T.,
et al
. “Screening of Exopolysaccharide Producing
Bacterium Frateuria Aurentia From Elephant Dung”.
Applied
Science Reports
1.3 (2014): 105-109.
-
Kaur V.,
et al.
“Production and Characterization of Exopoly
-
saccharide Produced by Alcaligenes Faecalis B14 Isolated
from Indigenous Soil”.
International Journal of Biotechnology
and Bioengineering Research
4.4 (2013): 365-374.
-
Pawar ST.,
et al
. “Isolation, screening and optimization of exo-
polysaccharide producing bacterium from saline soil”.
Jour
-
nal of Microbiology and Biotechnology Research
3.3 (2013):
24-31.
-
Rabha B.,
et al.
“Effect of some fermentation substrates and
growth temperature on exopolysaccharide production by
Streptococcus thermophilus BN1”.
International Journal of
Bioscience, Biochemistry and Bioinformatics
2.1 (2012): 44-
47.