Different metabolic and genetic responsesin citrus may explain relative susceptibilityto Tetranychus urticae
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Otros documentos de la autoría: Agut, Blas; Gamir, Jordi; Jaques , Josep A.; Hurtado-Ruiz, Monica; Flors, Victor
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http://dx.doi.org/10.1002/ps.3718 |
Metadatos
Título
Different metabolic and genetic responsesin citrus may explain relative susceptibilityto Tetranychus urticaeFecha de publicación
2014Editor
WileyISSN
1526-4998; 1526-498XTipo de documento
info:eu-repo/semantics/articleVersión de la editorial
http://onlinelibrary.wiley.com/doi/10.1002/ps.3718/epdfPalabras clave / Materias
Resumen
1 BACKGROUND
Life history parameters of the phytophagous spider mite Tetranychus urticae in citrus depend on the rootstock where the cultivar is grafted. To unveil the mechanisms responsible for this effect, the ... [+]
1 BACKGROUND
Life history parameters of the phytophagous spider mite Tetranychus urticae in citrus depend on the rootstock where the cultivar is grafted. To unveil the mechanisms responsible for this effect, the authors have carried out comparative experiments of T. urticae performance on two citrus rootstocks, the highly T. urticae-sensitive Cleopatra mandarin and the more tolerant sour orange.
2 RESULTS
Sour orange showed reduced leaf damage symptoms, supported lower mite populations and reduced oviposition rates compared with Cleopatra mandarin. Hormonal, metabolomic and gene expression analyses of the main defence pathways suggest a relevant role of the oxylipin and the flavonoid pathways in the response against T. urticae. Sour orange showed an increased activity of the JA pathway, which was hardly active in the most susceptible rootstock. Moreover, treatments with the LOX inhibitor Phenidone abolished the enhanced tolerance of sour orange. Therefore, oxylipin-dependent defence seems to be rootstock dependent. The metabolomic analysis showed the importance of the flavonoid pathway, which is implicated in the interaction between plants and their environment.
3 CONCLUSION
The findings suggest that sour-orange enhanced tolerance to spider mites can be sustained by a combination of pre-existing and induced responses depending on high levels of flavonoids and a fast and effective activation of the oxylipin pathway. © 2013 Society of Chemical Industry [-]
Publicado en
Pest Manag Sci 2014; 70: 1728–1741Derechos de acceso
© 2013 Society of Chemical Industry
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