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首页> 外文期刊>Biodegradation >Isolation and characterization of a novel 2-sec-butylphenol-degrading bacterium Pseudomonas sp. strain MS-1
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Isolation and characterization of a novel 2-sec-butylphenol-degrading bacterium Pseudomonas sp. strain MS-1

机译：新型2-仲丁基苯酚降解细菌假单胞菌sp。的分离和鉴定。 MS-1株

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摘要

A novel bacterium capable of utilizing 2-sec-butylphenol as the sole carbon and energy source, Pseudomonas sp. strain MS-1, was isolated from freshwater sediment. Within 30 h, strain MS-1 completely degraded 1.5 mM 2-sec-butylphenol in basal salt medium, with concomitant cell growth. A pathway for the metabolism of 2-sec-butylphenol by strain MS-1 was proposed on the basis of the identification of 3 internal metabolites—3-sec-butylcatechol, 2-hydroxy-6-oxo-7-methylnona-2,4-dienoic acid, and 2-methylbutyric acid—by gas chromatography-mass spectrometry analysis. Strain MS-1 degraded 2-sec-butylphenol through 3-sec-butylcatechol along a meta-cleavage pathway. Degradation experiments with various alkylphenols showed that the degradability of alkylphenols by strain MS-1 depended strongly on the position (ortho ≫ meta = para) of the alkyl substitute, and that strain MS-1 could degrade 2-alkylphenols with various sized and branched alkyl chain (o-cresol, 2-ethylphenol, 2-n-propylphenol, 2-isopropylphenol, 2-sec-butylphenol, and 2-tert-butylphenol), as well as a dialkylphenol (namely, 6-tert-butyl-m-cresol).
机译：一种能够利用2-仲丁基苯酚作为唯一碳源和能源的新型细菌，假单胞菌。从淡水沉积物中分离出MS-1菌株。在30小时内，菌株MS-1在基础盐培养基中完全降解了1.5 mM 2-仲丁基苯酚，并伴随细胞生长。在鉴定3种内部代谢物的基础上，提出了MS-1菌株代谢2-仲丁基苯酚的途径，即3-仲丁基邻苯二酚，2-羟基-6-氧代-7-甲基壬基-2,4。 -二烯酸和2-甲基丁酸-通过气相色谱-质谱分析。 MS-1菌株通过间位裂解途径通过3-仲丁基邻苯二酚降解了2-仲丁基苯酚。各种烷基酚的降解实验表明，菌株MS-1降解烷基酚的能力在很大程度上取决于烷基取代基的位置（邻位meta =对位），并且菌株MS-1可以降解具有各种大小和支链烷基的2-烷基酚链（邻甲酚，2-乙基苯酚，2-正丙基苯酚，2-异丙基苯酚，2-仲丁基苯酚和2-叔丁基苯酚）以及二烷基苯酚（即6-叔丁基-m-甲酚）。

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