Altered acetyl-coenzyme A carboxylase confers resistance to clethodim, fluazifop and sethoxydim in Setaria faberi and Digitaria sanguinalis

被引：23

作者：

Volenberg, D ^{[1
]}

Stoltenberg, D ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Agron, Madison, WI 53706 USA

来源：

WEED RESEARCH | 2002年 / 42卷 / 05期

关键词：

ACCase; aryloxyphenoxypropionate herbicides; cyclohexanedione herbicides; dose-response;

D O I：

10.1046/j.1365-3180.2002.00294.x

中图分类号：

S3 [农学（农艺学）];

学科分类号：

0901 ;

摘要：

Populations of Setaria faberi and Digitaria sanguinalis cross-resistant to sethoxydim and fluazifop-P-butyl were identified in a vegetable cropping system in Wisconsin, USA, in 1991 and 1992 respectively. Experiments were conducted with partially purified acetyl-CoA carboxylase (ACCase) to determine whether resistance to sethoxydim and other ACCase inhibitors in S. faberi and D. sanguinalis resulted from altered enzyme activity. Based on I-50 values (the herbicide dose that inhibited ACCase activity by 50% compared with untreated ACCase), ACCase of the resistant accession of S. faberi was 4.8-, 10.6- and 319-fold resistant to clethodim, fluazifop-P acid and sethoxydim, respectively, compared with that of the susceptible accession. Similarly, ACCase of the resistant accession of D. sanguinalis was 5.8-, 10.3- and 66-fold resistant to clethodim, fluazifop-P acid and sethoxydim respectively. These results indicated that resistance to ACCase inhibitors in these accessions of S. faberi and D. sanguinalis resulted from an altered ACCase enzyme that confers a very high level of resistance to sethoxydim.

引用

页码：342 / 350

页数：9

共 37 条

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