Characteristics and metabolic pathway of acetamiprid biodegradation by Fusarium sp. strain CS-3 isolated from soil
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An acetamiprid-degrading fungus was isolated from contaminated soil and identified as Fusarium sp. strain CS-3 based on physiological, biochemical, and molecular analyses. Strain CS-3 exploited 50 mg/L as the sole carbon source in liquid culture, removing 98% in 96 h. Strain CS-3 retained its acetamiprid degradation abilities over a wide range of pH (5.0–8.0) and temperature (20–42 °C). HPLC–MS analysis showed that N′-[(6-chloropyridin-3-yl)methyl]-N-methylacetamide, 2-chloro-5-hydroxymethylpyridine, and 6-chloronicotinic acid were identified as the most predominant metabolites, forming the basis for a newly described acetamiprid degradation pathway. Strain CS-3 efficiently degraded 99.6% of 50 mg/kg acetamiprid in soil, indicating potential for soil remediation.
KeywordsAcetamiprid 6-Chloronicotinic acid Fusarium sp. Strain CS-3 Acetamiprid-contaminated soil remediation
This work was supported by the National Natural Science Foundation of China (No. 31700092, No. 21727818, No. 21390200, No. 21706125, No. 21706124), the Jiangsu Province Natural Science Foundation for Youths (No. BK20170997, No. BK20170993), The Key Science and Technology Project of Jiangsu Province (No. BE2016389), The Project of State Key Laboratory of Materials Oriented Chemical Engineering (KL17-09), and The Jiangsu Synergetic Innovation Center for Advanced Bio-Manufacture (XTE1834).
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