Isolation and Degradation Characteristics of a Novel Halophilic Polycyclic Aromatic Hydrocarbon-Degrading Bacterium
文献类型： 外文期刊
第一作者： Cao, H.
作者： Cao, H.;Wang, S.;Guo, L.;Zhao, B.;Wang, H.;Wang, Y.;Cao, H.
作者机构：
关键词：
bioremediation; halophilic bacterium; PAH biodegradation; degradation pathway;
期刊名称：MICROBIOLOGY （ 影响因子：1.3； 五年影响因子：1.5 ）
ISSN： 0026-2617
年卷期： 2025 年 94 卷 4 期
页码：
收录情况： SCI
摘要： Polycyclic aromatic hydrocarbons (PAHs) are persistent pollutants that accumulate more easily in saline alkaline environments. The removal of PAHs from saline-alkali environment poses a significant challenge. Microbial degradation offers a promising low-cost, green, highly efficient approach to remediating PAH pollution. In this study, a moderately halophilic bacterium, designated as strain SL-6, that possesses the ability to efficiently degrade PAHs was isolated from an oil-contaminated soil sample. This strain showed strong adaptability to the saline alkaline environment, growing at pH 6.5-9.5, 15-50 degrees C, and 0-12% NaCl (wt/vol). Under the optimal degrading conditions (pH 8.0, 30 degrees C, and 3.0% NaCl), strain SL-6 could degrade nine types of PAHs. For instance, it fully degraded naphthalene within two days and achieved a degradation efficiency of 96% for phenanthrene within six days. Using polyphasic taxonomic analyses, strain SL-6 was identified as a Stutzerimonas frequens strain. This is the first report for S. frequens to possess the ability to degrade PAHs. The application of S. frequens SL-6 may be an attractive alternative for the bioremediation of PAHs in saline alkaline environments.
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