Hormonal Responses to Susceptible, Intermediate, and Resistant Interactions in the Brassica napus-Leptosphaeria maculans Pathosystem.
Int J Mol Sci
; 22(9)2021 Apr 29.
Article
em En
| MEDLINE
| ID: mdl-33946839
ABSTRACT
Hormone signaling plays a pivotal role in plant-microbe interactions. There are three major phytohormones in plant defense salicylic acid (SA), jasmonic acid (JA), and ethylene (ET). The activation and trade-off of signaling between these three hormones likely determines the strength of plant defense in response to pathogens. Here, we describe the allocation of hormonal signaling in Brassica napus against the fungal pathogen Leptosphaeria maculans. Three B. napus genotypes (Westar, Surpass400, and 01-23-2-1) were inoculated with two L. maculans isolates (H75 8-1 and H77 7-2), subsequently exhibiting three levels of resistance susceptible, intermediate, and resistant. Quantitative analyses suggest that the early activation of some SA-responsive genes, including WRKY70 and NPR1, contribute to an effective defense against L. maculans. The co-expression among factors responding to SA/ET/JA was also observed in the late stage of infection. The results of conjugated SA measurement also support that early SA activation plays a crucial role in durable resistance. Our results demonstrate the relationship between the onset patterns of certain hormone regulators and the effectiveness of the defense of B. napus against L. maculans.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Doenças das Plantas
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Regulação da Expressão Gênica de Plantas
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Ácido Salicílico
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Ciclopentanos
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Brassica napus
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Etilenos
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Oxilipinas
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Interações Hospedeiro-Patógeno
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Leptosphaeria
Idioma:
En
Revista:
Int J Mol Sci
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Canadá