期刊
JOURNAL OF APPLIED MICROBIOLOGY
卷 121, 期 1, 页码 177-186出版社
WILEY-BLACKWELL
DOI: 10.1111/jam.13123
关键词
biodegradation; GC-MS; pathway; phthalates; Rhizobium sp; LMB-1
资金
- National Science Foundation of China [31401592]
AimsTo isolate a novel strain that could degrade many kinds PAEs efficiently and investigate the DBP-degrading pathway in this strain. Methods and ResultsBased on its 16S rRNA gene sequence, the strain was identified as Rhizobium sp. This strain, named LMB-1, can also utilize phthalates, such as DEHP, DMP, DBP and DEP. During the degradation of DBP, six possible metabolites, diethyl phthalate, mono-ethyl phthalate, di-methyl phthalate, mono-methyl phthalate, phthalic acid and tartaric acid, were identified by gas chromatography-mass spectrometry (GC-MS) analysis, and the degradation pathway of DBP was also identified in this study. ConclusionsIn summary, strain LMB-1, identified as Rhizobium sp., was found to be capable of efficiently degrading PAEs, and it was determined that the strain degraded DMP completely within 45h. DEP, DMP, MEP, MMP, PA and tartaric acid were detected during the course of DBP degradation by LMB-1. We propose that this strain could completely degrade DBP or other PAEs. Our results offer a novel and potential candidate, Rhizobium sp. LMB-1, for use in the bioremediation of cultivated soil contaminated by PAEs. Significance and Impact of the StudyThis is the first report concerning the complete degradation of phthalate esters by Rhizobium sp.
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