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Extracellular polysaccharide production by a novel osmotolerant marine strain of Alteromonas macleodii and its application towards biomineralization of silver.

DIR@IMTECH: CSIR-Institute of Microbial Technology

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Title Extracellular polysaccharide production by a novel osmotolerant marine strain of Alteromonas macleodii and its application towards biomineralization of silver.
 
Creator Mehta, Ananya
Sidhu, Chandni
Pinnaka, Anil Kumar
Roy Choudhury, Anirban
 
Description The present study demonstrates exopolysaccharide production by an osmotolerant marine isolate and also describes further application of the purified polysaccharide for production of colloidal suspension of silver nanoparticles with narrow size distribution. Phylogenetic analysis based on 16S r RNA gene sequencing revealed close affinity of the isolate to Alteromonas macleodii. Unlike earlier reports, where glucose was used as the carbon source, lactose was found to be the most suitable substrate for polysaccharide production. The strain was capable of producing 23.4 gl(-1) exopolysaccharide with a productivity of 7.8 gl(-1) day(-1) when 15% (w/v) lactose was used as carbon source. Furthermore, the purified polysaccharide was able to produce spherical shaped silver nanoparticles of around 70 nm size as characterized by Uv-vis spectroscopy, Dynamic light scattering and Transmission electron microscopy. These observations suggested possible commercial potential of the isolated strain for production of a polysaccharide which has the capability of synthesizing biocompatible metal nanoparticle.
 
Publisher San Francisco, CA : Public Library of Science
 
Date 2014
 
Type Article
PeerReviewed
 
Relation http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4059621/
http://crdd.osdd.net/open/1566/
 
Identifier Mehta, Ananya and Sidhu, Chandni and Pinnaka, Anil Kumar and Roy Choudhury, Anirban (2014) Extracellular polysaccharide production by a novel osmotolerant marine strain of Alteromonas macleodii and its application towards biomineralization of silver. PloS one, 9 (6). e98798. ISSN 1932-6203