Physiological, metabolic and hormonal responses of two Pinus spp. with contrasting susceptibility to brown-spot needle blight disease
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https://doi.org/10.1093/treephys/tpae003 |
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Título
Physiological, metabolic and hormonal responses of two Pinus spp. with contrasting susceptibility to brown-spot needle blight diseaseAutoría
Fecha de publicación
2024-01-09Editor
Oxford University PressCita bibliográfica
Pedro Monteiro, Luis Valledor, Sonia Osorio, Álvaro Camisón, José Gabriel Vallarino, Aurelio Gómez-Cadenas, Julio Javier Díez, Glória Pinto, Physiological, metabolic and hormonal responses of two Pinus spp. with contrasting susceptibility to brown-spot needle blight disease, Tree Physiology, Volume 44, Issue 2, February 2024, tpae003, https://doi.org/10.1093/treephys/tpae003Tipo de documento
info:eu-repo/semantics/articleVersión
info:eu-repo/semantics/publishedVersionPalabras clave / Materias
Resumen
Needle blights are serious fungal diseases affecting European natural and planted pine forests. Brown-spot needle blight (BSNB) disease, caused by the fungus Lecanosticta acicola, causes canopy defoliation and severe ... [+]
Needle blights are serious fungal diseases affecting European natural and planted pine forests. Brown-spot needle blight (BSNB) disease, caused by the fungus Lecanosticta acicola, causes canopy defoliation and severe productivity losses, with consequences depending on host susceptibility. To gain new insights into BSNB plant–pathogen interactions, constitutive and pathogen-induced traits were assessed in two host species with differential disease susceptibility. Six-month-old Pinus radiata D. Don (susceptible) and Pinus pinea L. (more resistant) seedlings were needle inoculated with L. acicola under controlled conditions. Eighty days after inoculation, healthy-looking needles from symptomatic plants were assessed for physiological parameters and sampled for biochemical analysis. Disease progression, plant growth, leaf gas-exchanges and biochemical parameters were complemented with hormonal and untargeted primary metabolism analysis and integrated for a holistic analysis. Constitutive differences between pine species were observed. Pinus pinea presented higher stomatal conductance and transpiration rate and higher amino and organic acids, abscisic acid as well as putrescine content than P. radiata. Symptoms from BSNB disease were observed in 54.54% of P. radiata and 45.45% of P. pinea seedlings, being more pronounced and generalized in P. radiata. For both species, plant height, sub-stomatal CO2 concentration and water-use efficiency were impacted by infection. In P. radiata, total soluble sugars, starch and total flavonoids content increased after infection. No differences in hormone content after infection were observed. However, secondary metabolism was induced in P. pinea visible through total phenolics, flavonoids and putrescine accumulation. Overall, the observed results suggest that P. pinea constitutive and induced traits may function as two layers of a defence strategy which contributed to an increased BSNB resistance in comparison with P. radiata. This is the first integrative study linking plant physiological and molecular traits in Pinus–Lecanosticta acicola pathosystem, contributing to a better understanding of the underlying resistance mechanisms to BSNB disease in pines. [-]
Entidad financiadora
Portuguese Foundation for Science and Technology (FCT/MCTES) | European Social Fund (ESF) | European Commission | Universidad de Extremadura (Spain) | Ministerio de Ciencia, Innovación y Universidades (Spain) | Junta de Andalucía (Spain) | Junta Castilla y León (Spain)
Código del proyecto o subvención
UIDP/50017/2020 | UIDB/50017/2020 | LA/P/0094/2020 | SFRH/BD/143879/2019 | PID2021-128527OB-I00 | PAIDI 2020 | PAIDI 2021 | PY20_00408 | P21-00315 | EMERGIA20_00309 | RYC2021-034936-I | TED2021-129795B-I00 | PID2019-110459RB-100 | PLEC2021-008076 | VA208P20
Título del proyecto o subvención
F4F—Forest For Future
Derechos de acceso
© The Author(s) 2024. Published by Oxford University Press. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com
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