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《Journal of Chemical Engineering of Chinese Universities》 2012-01
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Degradation Characteristics and Applications of Amycolatopsis sp.M3-1 for ZJ0273

CAI Zhi-qiang1,2,XU Xiang-hong3,CHEN Qiao-li2,ZHAO Xi-yue2, WANG Hai-yan1,HUANG Lei,2 YE Qing-fu1(1.Institute of Nuclear Agricultural Sciences,Key Laboratory of Nuclear Agricultural Sciences of Ministry of Agriculture,Zhejiang University,Hangzhou 310029,China; 2.Lab.of Applied Microbiology,Changzhou University,Changzhou 213164,China; 3.Radiation Environmental Monitoring Center of Zhejiang Province,Hangzhou 310012,China)  
ZJ0273,Propyl 4-(2-(4,6-dimethoxypyrimidin-2-yloxy) benzylamino) benzoate,is a novel herbicide with the property of high activity,broad spectrum and low toxicity to animals,and it is developed for pre-and post-emergence weed control in the oilseed rape field.The highly efficient ZJ0273 degrading bacterial strain M3-1 was screened,isolated and separated from farmland of long-term using pyrimidinylthiobenzoate herbicides by applying modern molecular biological techniques together with the traditional microbiological methods,and it can grow on by using ZJ0273 as the sole carbon and energy source.The strain M3-1 was identified as Amycolatopsis sp.by physiological,biochemical tests and 16s rDNA sequence.The optimum ZJ0273 degrading conditions of using strain M3-1 and their application in soil were studied.The results show that with condition of 35℃,pH 6.0,8% of inoculation and 100 mg?L?1 of ZJ0273,the degrading ratio in 25 d is 63.3%.Using strain M3-1,the degradation ratio of ZJ0273 is decreased with the increasing ZJ0273 concentration;300 mg?L?1 of ZJ0273 can strongly inhibit bio-activity of strain M3-1,which means that higher concentration of ZJ0273 has higher toxicity to M3-1.The strain M3-1also has a good degradation effect to ZJ0273 in soil,the degradation ratio could up to 53.7% after 25 days.The physicochemical properties of strain M3-1 may open new possibilities for its biotechnological applications and allow the use of Amycolatopsis sp.M3-1 in the soil bioremediation.
【Fund】: 国家自然科学基金(20977076 21007054);; 农业部公益性行业科研专项-核技术农业应用(201103007);; 常州市科技支撑计划(社会发展CE20115049)
【CateGory Index】: X172
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