Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications

P. Priyanka; A.B. Arun; C.C. Young; P.D. Rekha

doi:10.1007/s10118-015-1581-7

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Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications

PAPER | Updated：2022-01-17

- Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications
- Chinese Journal of Polymer Science Vol. 33, Issue 2, Pages: 236-244(2015)
- Affiliations：
  
  a.Yenepoya Research Centre, Yenepoya University, Deralakatte, Mangalore, Karnataka, India
  b.Department of Soil and Environment Sciences, National Chung-Hsing University, Taichung 402, China
- Author bio：
  
  **PD Rekha, E-mail: rekhapd@hotmail.com or dydirectoryrc@yenepoya.edu.in
- Funds：
- DOI：10.1007/s10118-015-1581-7
  CLC：
- Received：03 April 2014，
  
  Revised：2014-07-28，
  
  Accepted：01 September 2014，
  
  Published：2015-02
- Accepted：
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P. Priyanka, A.B. Arun, C.C. Young, et al. Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications[J]. Chinese Journal of Polymer Science, 2015, 33(2): 236-244.
DOI：

P. Priyanka, A.B. Arun, C.C. Young, et al. Prospecting Exopolysaccharides Produced by Selected Bacteria Associated with Marine Organisms for Biotechnological Applications[J]. Chinese Journal of Polymer Science, 2015, 33(2): 236-244. DOI： 10.1007/s10118-015-1581-7.

摘要

Abstract

In this study

bacteria associated with marine organisms were screened for the production of exopolysaccharides (EPSs) on MY media containing sea salts (2.5%-10%). Three selected isolates were identified as

Alteromonas

sp. PRIM-21

Nitratireductor

sp. PRIM-24 and

Enterobacter

sp. PRIM-26 using 16S rRNA gene sequencing. Optimization of the growth and EPS production kinetics in relation to incubation time were assessed. The purified EPS yield was 590

650 and 540 mg·L

-1

culture media respectively in

Alteromonas

sp. PRIM-21

Nitratireductor

sp. PRIM-24 and

Enterobacter

sp. PRIM-26. Biochemical and FTIR analyses revealed the presence of biologically important functional groups in the EPS produced by all the three isolates. The EPS produced by

Nitratireductor

sp. PRIM-24 and

Alteromonas

sp. PRIM-21 showed 2.0% sulfate content. These bacterial EPS also showed antioxidant and emulsifying activities and the EPS produced by

Enterobacter

sp.PRIM-26 showed significantly higher antioxidant activities in terms of superoxide (IC

0.33 mg·mL

-1

) and DPPH (IC

0.44 mg·mL

-1

) radical scavenging. It also showed higher emulsifying activities against selected hydrophobic substrates with EI

values above 60%. From the results of the study

it can be concluded that the isolated bacteria produce EPS that can be investigated in detail for biotechnological applications.

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