期刊
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY
卷 65, 期 47, 页码 10243-10249出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jafc.7b04022
关键词
nicosulfuron; Oceanisphaera psychrotolerans; biodegradation; low temperature
资金
- National Natural Science Foundation of China (NSFC) [31670006, 31700006]
- Central Public-interest Scientific Institution Basal Research Fund (CAFS) [2017C004]
- National Nonprofit Institute Research Grant of the Chinese Academy of Agricultural Sciences (CAAS) [2014-30]
Nicosulthron is a common environmental pollutant, posing a great threat to aquatic systems and causing significant damage to crops. This study reported a cold-adapted strain Oceanisphaera psychrotolerans LAM-WHM-ZC, which efficiently degrades nicosulfuron over a wide range of temperatures (5 to 40 degrees C). The Box-Behnken design method was used to optimize the degradation conditions. O. psychrotolerans LAM-WHM-ZC can degrade 92.4% and 74.6% of initially supplemented 100 mg/L nicosulfuron under the optimum and low temperature of 18.1 and 5 degrees C, respectively, within 7 days. O. psychrotolerans LAM-WHM-ZC was found to be highly efficient in degrading cinosulfuron, chlorsulfuron, rimsulfuron, bensulfuron methyl, and ethametsulfuron methyl. Metabolites from nicosulfuroh degradation were identified by UPLC-MS, and a possible degradation pathway was proposed. Furthermore, O. psychrotolerans LAM-WHM-ZC can also degrade nicosulfuron in soil; 78.6% and 67.4% of the initial nicosulfuron supplemented at 50 mg/kg were removed at 18.1 and 5 degrees C, respectively, within 15 days.
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