抗性和敏感生物型菵草代谢精唑禾草灵的速度差异
2017-08-30颜欣茹杨俊雪薛君刘嘉慧李凌绪
颜欣茹+杨俊雪+薛君+刘嘉慧+李凌绪
摘要:为了测定菵草抗性生物型SD-04-SS和敏感生物型SD-12对精唑禾草灵代谢速度的差异,建立了精唑禾草灵及其主要代谢产物精唑禾草酸、6-氯苯并唑酮的高效液相色谱(HPLC)分析方法。结果表明,在0.123~30.000 μg/mL范围内、0.977~1 000.000 μg/mL范围内、0.469~30.000 μg/mL范围内6-氯苯并唑酮、精唑禾草酸、精唑禾草灵浓度与响应值线性关系良好,相关系数(r)分别为0.991 2、0972 2、0.996 3。应用上述方法分析发现,精唑禾草灵处理后2 h在菵草体内即可检测到精唑禾草酸和6-氯苯并唑酮,药后2~96 h抗性生物型SD-04-SS体内精唑禾草灵的含量始终略高于敏感生物型SD-12,药后24~72 h抗性生物型SD-04-SS体内精唑禾草酸的含量显著低于敏感生物型SD-12,说明抗性生物型降解精唑禾草酸的速度比敏感生物型更快。
关键词:菵草;精唑禾草灵;代谢;高效液相色谱;除草剂抗性
中图分类号:S482.4文献标志码:A文章编号:1003-935X(2017)01-0015-05
Differences in Metabolism Rate of Fenoxaprop-P-Ethyl Among
Beckmannia syzigachne Biotypes
YAN Xinru,YANG Junxue,XUE Jun,LIU Jiahui,LI Lingxu
(Qingdao Agricultural University,Qingdao 266109,China)
Abstract: An HPLC method was developed to analyze the concentration of fenoxaprop-P-ethyl,fenoxaprop-P and 6-chlorobenzoxazolone in Beckmannia syzigachne,and to determine differences in the rate of fenoxaprop-P-ethyl degradation between the resistant biotype SD-04-SS and susceptible biotype SD-12. Excellent linearity was obtained in the range of 0.123-30 μg/mL,0.977-1000 μg/mL and 0.469-30 μg/mL for 6-chlorobenzoxazolone,fenoxaprop-P and fenoxaprop-P-ethyl,respectively,with correlation coefficient of 0.9912,0.9722 and 0.9963,respectively. The method was employed to analyze the concentration of fenoxaprop-P-ethyl,fenoxaprop-P and 6-chlorobenzoxazolone in both biotypes. Fenoxaprop-P and 6-chlorobenzoxazolone could be detected in B. syzigachne 2 hours after treatment with fenoxaprop-P-ethyl. The concentration of fenoxaprop-P-ethyl in SD-04-SS (R) was always higher than that in SD-12 (S) within 2~96 hours after treatment (HAT),but the concentration of fenoxaprop-P in
收稿日期:2016-12-20
基金项目:国家自然科学基金(编号:31301680);青岛农业大学2015年大学生科技创新基金。
作者简介:颜欣茹(1995—),女,本科生。E-mail:2323458818@qq.com。
通信作者:李凌绪,博士,副教授,主要从事杂草抗药性研究。E-mail:lingxulipvi@126.com。SD-04-SS (R) was always higher than that in SD-12 (S) within 24~72 hours. Thefore the resistant biotype SD-04-SS degrades fenoxaprop-P faster than the susceptible biotype SD-12.
Key words: Beckmannia syzigachne;fenoxaprop-P-ethyl;metabolism;HPLC;herbicidal resistance
菵草(Beckmannia syzigachne)为禾本科菵草属一年生杂草,是长江中下游地区稻茬麦田的主要杂草之一[1-3] 。精唑禾草灵(fenoxaprop-P-ethyl)属于乙酰辅酶A羧化酶(ACCase)抑制剂类除草剂,是小麦田苗后选择性防治禾本科杂草的主要除草剂品种之一。精唑禾草灵在禾本科杂草体内代谢为精唑禾草酸(fenoxaprop-P)起到除草作用,精唑禾草酸进一步代谢为6-氯苯并唑酮(6-chlorobenzoxazolone)等化合物后失去除草效果[4-5]。我国自1990年代開始应用精唑禾草灵防除稻茬麦田菵草,如今江苏、安徽、山东等部分地区的菵草已对精唑禾草灵产生了抗性[6-9]。……
