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KMID : 0545120050150040859
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Journal of Microbiology and Biotechnology
2005 Volume.15 No. 4 p.859 ~ p.865
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Effects of Salicylate and Glucose on Biodegradation of Phenanthrene by Burkholderia cepacia PM07
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Lee DS
Lee MW/Woo SH/Park JM
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Abstract
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The stimulatory effects of exogenous salicylate as a pathway inducer on phenanthrene biodegradation were investigated using Burkholderia cepacia PM07. The phenanthrene degradation rate was greatly enhanced by increasing the salicylate additions and the maximum rate was 19.6 mg l-1 d-1 with the addition of 200 mg l-1 of salicylate, 3.5 times higher than that (5.6 mg l-1 d-1) without the addition of salicylate. The degradation rate was decreased at higher concentrations of salicylate (above 500 mg l-1), and cell growth was significantly inhibited. The phenanthrene degradation was not affected by increasing glucose up to 2 g l-1, although dramatic microbial growth was obtained. The stimulatory effect of exogenous salicylate decreased in the presence of glucose. After the addition of 200 mg l-1 of salicylate, approximately 60% of the initial phenanthrene (50 mg l-1) was degraded after 96 h. However, with extra addition of 200 mg l-1 of glucose, the phenanthrene degradation rate decreased, and only 18.5% of the initial phenanthrene was degraded.
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