[Differences in exogenous methyl jasmonate-induced quinclorac resistance between resistant and sensitive barnyardgrass and the underlying mechanism]. / å¤æºèèé
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Ying Yong Sheng Tai Xue Bao
; 31(7): 2293-2298, 2020 Jul.
Article
em Zh
| MEDLINE
| ID: mdl-32715694
ABSTRACT
The effects of exogenous methyl jasmonate (MeJA) on the resistance levels to quinclorac and endogenous hormone levels were examined using the resistant and sensitive biotypes of barnyardgrass with the same genetic background. The results showed that exogenous MeJA could significantly increase the resistance of resistant plants to quinclorac, but did not affect the resistance of sensitive plants. There were significant differences in the contents of indole-3-acetic acid (IAA), abscisic acid (ABA), salicylic acid (SA), and jasmonic acid (JA) among the tested materials. Quinclorac treatment could significantly increase the contents of ABA, SA, and JA in barnyardgrass, with stronger increase of ABA and JA contents in the sensitive plants. Exogenous MeJA could significantly enhance the induction of ABA and JA contents by quinclorac, especially in the sensitive biotypes. These results showed that rapid hormone variations in sensitive plants inhibited their response to herbicide, while gentle hormone variations endowed resistant plants with a strong adapta-bility to herbicide, which closely related to the enhanced resistance by MeJA. ABA and JA hormone signals might play an important role in the resistance of barnyardgrass to quinclorac stress.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Quinolinas
/
Echinochloa
Tipo de estudo:
Diagnostic_studies
Idioma:
Zh
Ano de publicação:
2020
Tipo de documento:
Article