Nicosulfuron Biodegradation by a Novel Cold-Adapted Strain Oceanisphaera psychrotolerans LAM-WHM-ZC

文献类型： 外文期刊

第一作者： Zhou, Shan

作者： Zhou, Shan;Zhang, Qi;Kong, Delong;Zhou, Yiqing;Jiang, Xu;Ruan, Zhiyong;Zhou, Shan;Fan, Ziwen;Song, Jinlong;Mu, Yingchun;Han, Gang;Dong, Weiwei;Zhao, Bin;Dong, Weiwei;Zhao, Bin

作者机构：

关键词： nicosulfuron;Oceanisphaera psychrotolerans;biodegradation;low temperature

期刊名称：JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY （ 影响因子：5.279； 五年影响因子：5.269 ）

ISSN： 0021-8561

年卷期： 2017 年 65 卷 47 期

页码：

收录情况： SCI

摘要： 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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