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中国农学通报 ›› 2019, Vol. 35 ›› Issue (7): 128-133.doi: 10.11924/j.issn.1000-6850.casb18030068

所属专题: 油料作物 小麦 园艺 农业生态

• 植物保护 农药 • 上一篇    下一篇

春油菜田抗性生物型野燕麦对高效氟吡甲禾灵的抗性机制研究

朱亮1, 翁华2, 魏有海2   

  1. 1.青海大学;2.青海省农林科学院
  • 收稿日期:2018-03-13 修回日期:2019-01-18 接受日期:2018-07-21 出版日期:2019-03-04 发布日期:2019-03-04
  • 通讯作者: 魏有海
  • 基金资助:
    国家重点研发计划“油菜田生物源除草剂新产品的研发”(2017YFD0201304-4);国家重点研发计划“青海高原生态区春油菜化学农药协同 增效技术与产品研发”(2016YFD0200504-05);青海省科技厅应用基础项目“青海春油菜田野燕麦对高效氟吡甲禾灵的抗性鉴定与评价”(2016-ZJ- 764);国家公益性行业(农业)专项“杂草抗药性监测与治理技术研究与示范”(201303031)。

Resistant Biotype Avena fatua L. in Spring Rape Field: Resistance Mechanisms to Haloxyfop-P-methyl

  • Received:2018-03-13 Revised:2019-01-18 Accepted:2018-07-21 Online:2019-03-04 Published:2019-03-04

摘要: 明确抗性生物型野燕麦对高效氟吡甲禾灵产生抗性的3种酶机制,为治理与延缓杂草抗药性提供科学依据。[方法]采用温室盆栽法,分别测定了抗性和敏感性生物型野燕麦的乙酰辅酶A羧化酶(ACCase)、细胞色素P450还原酶(CYP450)和谷胱甘肽-S-转移酶(GSTs)的活性差异。结果表明,未加药剂时,抗性生物型野燕麦ACCase的活性低于敏感性生物型;随着药剂浓度的增加,2个生物型ACCase的活性逐渐降低,但抗性生物型降低幅度小于敏感生物型,二者ACCase活性IC50分别为78.369 μmol/L和43.469 μmol/L,活性倍数1.8。清水处理时,野燕麦抗性生物型与敏感生物型CYP450还原酶和GSTs活性差异均不明显;施药后,抗性生物型CYP450还原酶和GSTs的活性均高于敏感生物型,药后12天,抗性生物型与敏感生物型CYP450还原酶活性分别113.1 pmol/L和38.9 pmol/L,活性倍数2.91;2个生物型GSTs活性分别为210.6 mIU/L和319.1 mIU/L,活性倍数1.52。[结论]靶标酶活性较高水平的维持及代谢酶活性的增强是野燕麦对高效氟吡甲禾灵产生抗性的重要机制。

关键词: 间作, 间作, 连作障碍, 土传病害, 自毒效应, 微生物多样性

Abstract: We verified three enzyme mechanisms of resistant biotype Avena fatua L. against Haloxyfop-Pmethyl, in order to provide a basis for controlling and delaying weed resistance. We tested the difference of ACCase, CYP450 reductase and GSTs activities in Haloxyfop-R-methyl resistant and sensitiveA vena fatua L. biotypes by potting method in greenhouse. The results showed that: the ACCase activity of resistant biotype Avena fatua L. was lower than that of sensitive biotype when herbicides were not applied; with the increase of Haloxyfop-R-methyl concentration, the activity of 2 biotype ACCase decreased gradually, but the decrease of there sistant biotype wasless than that of the sensitivebiotype, the two ACC aseactivity IC50 valuewas78.369μmol/L and 43.469 μmol/L, respectively, and the active multiple was 1.8; there was no significant differences in the activity of CYP450 reductase and GSTs between the resistant biotype and sensitive biotype of Avena fatua L. under water treatment; the activity of the resistant bio-type CYP450 reductase and GSTs was higher than that of the sensitive biotype after the application; after 12 days of application, the content of the resistant biotype and the sensitive biotype CYP450 reductase was 113.1 pmol/L and 38.9 pmol/L, respectively, the activity multiple was 2.91, and the 2 biotypes’GSTs activity was 210.6 mIU/L and 319.1 mIU/L, respectively, and the active multiple was 1.52. The high level of target enzyme activity and the enhancement of metabolic enzyme activity are important mechanisms for the resistance of Avena fatua L. to Haloxyfop-P-methyl.