Abstract
The fusant strain (F14), which produced by protoplast fusion between Sphingomonas sp. GY2B (GenBank DQ139343) and Pseudomonas sp. GP3A (GenBank EU233280), was tested for phenanthrene biodegradation at 30 °C and pH of 7.0. The kinetics of phenanthrene biodegradation by F14 was investigated over a wide range of initial concentration (15–1,000 mg l−1). The rate and the extent of phenanthrene degradation increased with the increase of concentration up to 230 mg l−1, which indicated negligible inhibition effect at low concentrations. The non-competitive inhibition model was found to be fit for the process. GC–MS analysis showed that biodegradation of phenanthrene by F14 was via dioxygenation at both 1,2- and 3,4-positions and followed by 2-hydroxy-1-naphthoic acid and 1-hydroxy-2-naphthoic acid. The relative intensity of 2-hydroxy-1-naphthoic acid was approximately 3–4 times higher than that of 1-hydroxy-2-naphthoic acid, indicating the 2-hydroxy-1-naphthoic acid was the predominant product in the phenanthrene degradation by fusant strain F14.
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Acknowledgments
This study was supported by a grant from the National Natural Science Foundation of China (40730741, 41073088, 41072268 and 41101291), the Guangdong Provincial Natural Science Foundation (No. 9351064101000001), the Guangdong Provincial Science and Technology Planning Project (2009B050900005).
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Lu, J., Dang, Z., Lu, G. et al. Biodegradation Kinetics of Phenanthrene by a Fusant Strain. Curr Microbiol 65, 225–230 (2012). https://doi.org/10.1007/s00284-012-0147-y
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DOI: https://doi.org/10.1007/s00284-012-0147-y