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A phenanthrene-degrading strain Sphingomonas sp. GY2B isolated from contaminated soils

Paper ID Volume ID Publish Year Pages File Format Full-Text
36137 45122 2007 8 PDF Available
Title
A phenanthrene-degrading strain Sphingomonas sp. GY2B isolated from contaminated soils
Abstract

This study systematically characterized an aerobic bacterial strain Sphingomonas sp. GY2B for biotransformation of phenanthrene. The strain was isolated from soils contaminated with polycyclic aromatic hydrocarbons (PAHs) and was shown to efficiently use phenanthrene as the sole carbon and energy source. The antibiotics discs susceptibility test revealed that the bacterium was susceptible to some commonly used antibiotics, such as cefuroxime, chloramphenicol, erythromycin and tetracycline. It showed better growth at pH 7.4 and 30 °C and in a mineral salts medium (MSM) with phenanthrene at 100 mg L−1 as the substrate. The results indicated that 99.8% of the substrate had been degraded and that salicylate route was likely the metabolic pathway. When added as the second organic chemical, glucose could enhance the bacterial growth at low concentration (10–200 mg L−1), but could inhibit cell growth at high concentration (>500 mg L−1). Further study showed that strain GY2B could also use naphthalene, phenol, 1-hydroxy-2-naphthoic acid, 2-naphthol, salicylic acid and catechol as the sole carbon and energy source, but did not grow on 1-naphthol which could be co-metabolized in the present of phenanthrene or 1-hydroxy-2-naphthoic acid.

Keywords
Phenanthrene; Biodegradation; Sphingomonas sp.; 1-Naphthol; Metabolite
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A phenanthrene-degrading strain Sphingomonas sp. GY2B isolated from contaminated soils
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 42, Issue 3, March 2007, Pages 401–408
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us