Diverse ALS mutations and cross-and multiple-resistance to ALS and EPSPS inhibitors in flucarbazonesodium-resistant Bromus japonicus populations from Hebei province, China.
Pestic Biochem Physiol
; 199: 105794, 2024 Feb.
Article
em En
| MEDLINE
| ID: mdl-38458688
ABSTRACT
Japanese brome (Bromus japonicus) has become one of the main weeds in wheat fields in Hebei province of China and causes a large decrease of wheat production. A total of 44 putative resistant and 2 susceptible Japanese brome populations were collected in the 2021/2022 crop season from Hebei province of China to determine resistance levels to flucarbazonesodium and to investigate the diversity of acetolactate synthase (ALS) mutations, as well as to confirm the cross-and multiple-resistance levels to ALS and EPSPS (5-enolpyruvate shikimate-3-phosphate synthetase) inhibitors. Whole plant bioassay results showed that 15 out of 44 populations tested or 34% were resistant to flucarbazonesodium. The resistance indices of Japanese brome to flucarbazonesodium ranged from 43 to 1977. The resistant populations were mainly distributed in Baoding and Shijiazhuang districts, and there was only one resistant population in Langfang district. Resistant Japanese brome had diverse ALS mutations, including Pro-197-Ser, -Thr, -Arg and Asp-376-Glu. The incidence of Pro-197-Ser mutation was the highest at 68%. Application of the CYP450 inhibitor malathion suggested that CYP450 was involved in metabolic resistance in a population without an ALS mutation. The population with Pro-197-Thr mutation evolved weak cross-resistance to mesosulfuron-methyl and pyroxsulam, and it is in the process of evolving multiple-resistance to glyphosate.
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Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Acetolactato Sintase
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Sulfonamidas
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Triazóis
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Herbicidas
País como assunto:
Asia
Idioma:
En
Ano de publicação:
2024
Tipo de documento:
Article