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European journal of molecular biology and biochemistry

Volume 1, Issue 5, 2014
Mcmed International
European journal of molecular biology and biochemistry
Issn
2348 - 2192 (Print), 2348 - 2206 (Online)
Frequency
bi-annual
Email
editorejmbb@mcmed.us
Journal Home page
http://mcmed.us/journal/ejmbb
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Abstract
Title
BIODEGRADATION OF Prosopis juliflora (SW.) D.C. WOOD BY THE MARINE CYANOBACTERIUM Oscillatoria laetevirens
Author
D. S. Prabha, R. Shanmugapriya, P. Mani* and H. U. Dahms
Email
master.maniji@gmail.com
keyword
Lignocellulose, Prosopis juliflora, cyanobacteria, Oscillatoria laetevirens, biodegradation.
Abstract
Biodegradation is recognized as a less expensive alternative to the physical and chemical degradation of organic pollutants. Cyanobacteria are firm candidates for such purposes and are one of the diverse groups of prokaryotes found in a wide variety of habitats. They are considered a potential resource in various biotechnological applications such as food, feed, fuel, fertilizer, medicine, industry and in combating pollution. In the present study, the lignin degrading ability of the marine cyanobacterium Oscillatoria laetevirens was investigated on wood of Prosopis juliflora. Results showed a significant increase in chlorophyll a when O. laetevirens was exposed to lignocellulosic waste. During this degradation process, the release of reducing sugar (63.6 μg/mL) and phenol (8.9 μg/mL) was found to be higher in P. juliflora degraded samples when compared to the control. Increased release of protein was followed by increased levels of nitrate and ammonia in P. juliflora treated cyanobacteria samples. Besides, this cyanobacterium was found to degrade 54.1% of lignin and eventually 46.7% of holocellulose from P. juliflora wood. Furthermore, the activity of degradative enzymes such as laccase, polyphenol oxidase and manganese independent peroxidase suggested a role of those enzymes in the degradation of P. juliflora by O. laetevirens.
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