Acetolactate synthase proline (197) mutations confer tribenuron-methyl resistance in Capsella bursa-pastoris populations from China

被引：48
作者：
Cui, Hai Lan [1 ]
Li, Xiangju [1 ]
Wang, Guiqi [2 ]
Wang, Jianping [2 ]
Wei, Shouhui [1 ]
Cao, Hongyu [1 ]
机构：
[1] Chinese Acad Agr Sci, Inst Plant Protect, Key Lab Weed & Rodent Biol & Management, Beijing 100193, Peoples R China
[2] Hebei Acad Agr & Forestry Sci, Inst Food & Oil, Shijiazhuang 050031, Peoples R China
来源：
PESTICIDE BIOCHEMISTRY AND PHYSIOLOGY | 2012年 / 102卷 / 03期
关键词：
Tribenuron-methyl; AHAS gene; Shepherd's purse; Herbicide resistance; RAPHANUS-RAPHANISTRUM POPULATIONS; ALS-INHIBITING HERBICIDES; ACETOHYDROXYACID SYNTHASE; CHLORSULFURON; WEEDS; SITE; L;
D O I：
10.1016/j.pestbp.2012.01.007
中图分类号：
Q5 [生物化学]; Q7 [分子生物学];
学科分类号：
071010 ; 081704 ;
摘要：
The increasing use of AHAS-inhibiting herbicides has resulted in evolved resistance in key dicot weeds infesting cereal cropping systems worldwide. Shepherd's purse (Capsella bursa-pastoris) is a common dicot weed species in wheat in China with populations that have evolved resistance to the AHAS herbicide tribenuron-methyl. The seeds of eight resistant populations were collected from wheat fields and one susceptible population from road side in Hebei province of China. All eight populations showed high level resistance to tribenuron-methyl with resistance indices of over 100 fold based on whole plant dose response assays in the greenhouse. Comparison of the AHAS gene sequences of the susceptible and resistant populations with Arabidopsis revealed that proline at position 197 of the AHAS gene was substituted by threonine in population CAPBU-HB-2, serine in populations CAPBU-HB-3, CAPBU-HB-4, CAPBU-HB-5, and CAPBU-HB-6, leucine in population CAPBU-HB-7 and CAPBU-HB-8, histidine in population CAPBU-HB-9. The study confirmed tribenuron-methyl resistance in shepherd's purse in Hebei province of China due to target site mutations at AHAS codon position 197. Crown Copyright (C) 2012 Published by Elsevier Inc. All rights reserved.
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页码：229 / 232
页数：4
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