Mycorrhiza-induced resistance in citrus against Tetranychus urticae is plant species dependent and inversely correlated to basal immunity
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INVESTIGACIONMetadatos
Título
Mycorrhiza-induced resistance in citrus against Tetranychus urticae is plant species dependent and inversely correlated to basal immunityAutoría
Fecha de publicación
2024Editor
Wiley; Society of Chemical IndustryISSN
1526-498X; 1526-4998Cita bibliográfica
MANRESA‐GRAO, María, et al. Mycorrhiza‐induced resistance in citrus against Tetranychus urticae is plant species dependent and inversely correlated to basal immunity. Pest Management Science, 2024Tipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://onlinelibrary.wiley.com/doi/full/10.1002/ps.8059Versión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
BACKGROUND
Mycorrhizal plants show enhanced resistance to biotic stresses, but few studies have addressed mycorrhiza-induced resistance (MIR) against biotic challenges in woody plants, particularly citrus. Here we ... [+]
BACKGROUND
Mycorrhizal plants show enhanced resistance to biotic stresses, but few studies have addressed mycorrhiza-induced resistance (MIR) against biotic challenges in woody plants, particularly citrus. Here we present a comparative study of two citrus species, Citrus aurantium, which is resistant to Tetranychus urticae, and Citrus reshni, which is highly susceptible to T. urticae. Although both mycorrhizal species are protected in locally infested leaves, they show very distinct responses to MIR.
RESULTS
Previous studies have indicated that C. aurantium is insensitive to MIR in systemic tissues and MIR-triggered antixenosis. Conversely, C. reshni is highly responsive to MIR which triggers local, systemic and indirect defense, and antixenosis against the pest. Transcriptional, hormonal and inhibition assays in C. reshni indicated the regulation of jasmonic acid (JA)- and abscisic acid-dependent responses in MIR. The phytohormone jasmonic acid isoleucine (JA-Ile) and the JA biosynthesis gene LOX2 are primed at early timepoints. Evidence indicates a metabolic flux from phenylpropanoids to specific flavones that are primed at 24 h post infestation (hpi). MIR also triggers the priming of naringenin in mycorrhizal C. reshni, which shows a strong correlation with several flavones and JA-Ile that over-accumulate in mycorrhizal plants. Treatment with an inhibitor of phenylpropanoid biosynthesis C4H enzyme impaired resistance and reduced the symbiosis, demonstrating that phenylpropanoids and derivatives mediate MIR in C. reshni.
CONCLUSION
MIR's effectiveness is inversely correlated to basal immunity in different citrus species, and provides multifaceted protection against T. urticae in susceptible C. reshni, activating rapid local and systemic defenses that are mainly regulated by the accumulation of specific flavones and priming of JA-dependent responses. © 2024 The Authors. Pest Management Science published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry. [-]
Publicado en
Pest Management Science, 2024.Entidad financiadora
Universitat Jaume I | Ministerio de Ciencia, Innovación y Universidades | Agencia Estatal de Investigación | Fondo Europeo de Desarrollo Regional (FEDER) | Unión Europea
Código del proyecto o subvención
RTI2018-094350-B-C33/PID2021-124813OB-C32 | MMGPRE2019-088662 | PRIMA-INTOMED | MCIN/AEI/10.13039/501100011033
Proyecto de investigación
MCIN/AEI/10.13039/501100011033Derechos de acceso
info:eu-repo/semantics/openAccess
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