Pinus Susceptibility to Pitch Canker Triggers Specific Physiological Responses in Symptomatic Plants: An Integrated Approach
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Otros documentos de la autoría: Amaral, Joana; Correia, Barbara; António, Carla; Rodrigues Rebelo, Ana Margarida; Gomez-Cadenas, Aurelio; Valledor, Luis; Hancock, Robert D.; Alves, Artur; Pinto, Glória
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Título
Pinus Susceptibility to Pitch Canker Triggers Specific Physiological Responses in Symptomatic Plants: An Integrated ApproachAutoría
Fecha de publicación
2019-04-24Editor
Frontiers MediaTipo de documento
info:eu-repo/semantics/articleVersión de la editorial
https://www.frontiersin.org/articles/10.3389/fpls.2019.00509/fullVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Fusarium circinatum, the causal agent of pine pitch canker (PPC), is an emergent
and still understudied risk that threatens Pinus forests worldwide, with potential
production and sustainability losses. In order to ... [+]
Fusarium circinatum, the causal agent of pine pitch canker (PPC), is an emergent
and still understudied risk that threatens Pinus forests worldwide, with potential
production and sustainability losses. In order to explore the response of pine species
with distinct levels of susceptibility to PPC, we investigated changes in physiology,
hormones, specific gene transcripts, and primary metabolism occurring in symptomatic
Pinus pinea, Pinus pinaster, and Pinus radiata upon inoculation with F. circinatum.
Pinus radiata and P. pinaster exhibiting high and intermediate susceptibility to PPC,
respectively, suffered changes in plant water status and photosynthetic impairment.
This was associated with sink metabolism induction, a general accumulation of amino
acids and overexpression of pathogenesis-related genes. On the other hand, P. pinea
exhibited the greatest resistance to PPC and stomatal opening, transpiration increase,
and glycerol accumulation were observed in inoculated plants. A stronger induction
of pyruvate decarboxylase transcripts and differential hormones regulation were also
found for inoculated P. pinea in comparison with the susceptible Pinus species studied.
The specific physiological changes reported herein are the first steps to understand
the complex Pinus–Fusarium interaction and create tools for the selection of resistant
genotypes thus contributing to disease mitigation. [-]
Publicado en
Frontiers in Plant Science (2019), v. 10Derechos de acceso
info:eu-repo/semantics/openAccess
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