Exopolysaccharides produced by Gordonia alkanivorans enhance bacterial degradation activity for diesel
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Exopolysaccharides (EPS) produced by Gordonia alkanivorans CC-JG39 was used to stimulate cell floating, cell growth, and diesel biodegradation of indigenous or commercial-available, diesel-degrading bacteria. Addition of EPS-containing supernatant into the culture medium resulted in floatation of the non-floating bacteria and allowed a 40–45% and 38–42% increase in diesel degradation and cell growth, respectively. The EPS-stimulating effect on cell growth and diesel degradation positively correlated with the EPS dosage. Thus, the EPS may act as a biostimulant for bioremediation of oil-contaminated water or soil.
KeywordsBiostimulation Diesel biodegradation Exopolysaccharides Floatation activity Gordonia alkanivorans
The authors gratefully acknowledge the financial support from Taiwan’s Ministry of Economic Affairs under Grant no. 95-EC-17-A-10-S1-0013.
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