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https://doi.org/10.6035/14002....
Doctoral thesis . 2019 . Peer-reviewed
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Citrus defense responses against Tetranychus urticae

Authors: Agut Capdevila, Blas;

Citrus defense responses against Tetranychus urticae

Abstract

En la presente tesis doctoral se han estudiado los mecanismos de defensa de cítricos frente al ataque de T. urticae a diferentes niveles. En primer lugar se analizaron los mecanismos de defensa directa utilizando dos patrones con diferente nivel de susceptibilidad. Se llegó a la conclusión de que la ruta de defensa del ácido jasmónico (JA) es la efectiva frente a la araña roja. Mediante análisis metabolómicos se observó una gran acumulación de diferentes flavonoides como naringenina o hesperetina en el patrón más resistente. Estos flavonoides con posible actividad acaricida posiblemente estén regulados por la ruta JA, fenómeno que se ha confirmado en otras especies vegetales. A continuación se estudió si los volátiles liberados por los cítricos tenían algún efecto sobre las plantas vecinas o sobre el propio fitófago. Los experimentos demostraron que los volátiles del patrón resistente naranjo amargo infestado con T. urticae eran capaces de inducir resistencia en el patrón susceptible mandarino Cleopatra y además que estos volátiles creaban un efecto de repelencia en el fitófago. Se observó que T. urticae evitaba las plantas de naranjo amargo previamente infestadas por conspecíficos. La identificación y cuantificación de los volátiles indicó que estos efectos eran causados por limoneno, ocimeno y 4-hidroxi-4-metil-2-pentanona. La última parte del trabajo se basó en estudios sistémicos para tratar de dilucidar las señales que eran transmitidas desde el patrón a la variedad. Se muestreó el eflujo de la raíz en plantas de la variedad Clemenules injertadas sobre los dos patrones ya citados. Posteriormente el análisis metabolómico de estas muestras indicó que el ácido glutámico parecía ser la señal que se transporta desde el patrón hasta la variedad.

Country
Spain
Keywords

Cítricos, 577, Tetranychus urticae, Ciències naturals, químiques, físiques i matemàtiques, 631

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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