Protection against diesel oil toxicity by sodium chloride-induced exopolysaccharides in Acinetobacter sp. strain DR1

Journal of Bioscience and Bioengineering
Yoon-Suk Kang, Woojun Park

Abstract

Acinetobacter sp. strain DR1 is capable of growth on diesel oil. Interestingly, the degradation of diesel oil by the strain DR1 is enhanced in the presence of sodium chloride (NaCl). However, the growth rate of strain DR1 is not affected by the presence of NaCl. Northern blot analysis has also demonstrated that the effect of NaCl on the degradation of diesel oil is not attributable to increased levels of alkane hydroxylase (AlkM-type) gene expression. Rather, we have noted an increase in the exopolysaccharide (EPS) yields of strain DR1 under high NaCl conditions (9-fold). The lag-time of diesel oil biodegradation was significantly shorter in the strain DR1 with exogenous EPS than in the controls, although EPS alone does not support the growth of strain DR1. The recovery of strain DR1 when exposed to diesel oil was accelerated when exogenous EPS was added to the medium. The overproduction of EPS was also noted in the presence of diesel oil and n-hexadecane. The data indicated that EPS overproduction might play a protective role against diesel oil toxicity. Along with the results of the soil microcosm tests, the data presented herein demonstrated that NaCl-induced EPS is associated with a reduction in diesel oil toxicity, and thu...Continue Reading

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Citations

Mar 4, 2011·The Journal of Microbiology·Yoon-Suk KangWoojun Park
May 4, 2011·The Journal of Microbiology·Jaejoon JungWoojun Park
Jul 20, 2010·Journal of Bacteriology·Jaejoon JungWoojun Park
Jan 3, 2012·Research in Microbiology·Kostlend MaraRenato Fani
May 10, 2015·Microbial Ecology·Jaejoon JungWoojun Park
Mar 3, 2010·Environmental Microbiology·Yoon-Suk Kang, Woojun Park
May 21, 2015·Environmental Science and Pollution Research International·Leadin Salah KhudurAndrew S Ball
Jun 21, 2017·Brazilian Journal of Microbiology : [publication of the Brazilian Society for Microbiology]·Saiqa TufailNazia Jamil
Jan 25, 2019·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Ikrema A HassanZe-Chun Yuan
Jul 15, 2017·Environmental Science and Pollution Research International·Marilina FernándezPaola S González
May 27, 2021·Scientific Reports·Eduardo K MitterJ Renato de Freitas

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