2024-03-29T08:18:10Zhttps://repositori.uji.es/oai/requestoai:repositori.uji.es:10234/1606382023-06-28T08:00:42Zcom_10234_2508com_10234_9col_10234_6999
Repositori UJI
author
Pérez-Bueno, María L.
author
Granum, Espen
author
Pineda, Mónica
author
Flors, Victor
author
Rodríguez-Palenzuela, Pablo
author
López-Solanilla, Emilia
author
Barón, Matilde
2016-06-13T09:10:48Z
2016-06-13T09:10:48Z
2016-01-08
PÉREZ-BUENO, María L., et al. Temporal and spatial resolution of activated plant defense responses in leaves of Nicotiana benthamiana infected with Dickeya dadantii. Frontiers in plant science, 2015, vol. 6
1664-462X
http://hdl.handle.net/10234/160638
http://dx.doi.org/10.3389/fpls.2015.01209
The necrotrophic bacteria Dickeya dadantii is the causal agent of soft-rot disease in a broad range of hosts. The model plant Nicotiana benthamiana, commonly used as experimental host for a very broad range of plant pathogens, is susceptible to infection by D. dadantii. The inoculation with D. dadantii at high dose seems to overcome the plant defense capacity, inducing maceration and death of the tissue, although restricted to the infiltrated area. By contrast, the output of the defense response to low dose inoculation is inhibition of maceration and limitation in the growth, or even eradication, of bacteria. Responses of tissue invaded by bacteria (neighboring the infiltrated areas after 2–3 days post-inoculation) included: (i) inhibition of photosynthesis in terms of photosystem II efficiency; (ii) activation of energy dissipation as non-photochemical quenching in photosystem II, which is related to the activation of plant defense mechanisms; and (iii) accumulation of secondary metabolites in cell walls of the epidermis (lignins) and the apoplast of the mesophyll (phytoalexins). Infiltrated tissues showed an increase in the content of the main hormones regulating stress responses, including abscisic acid, jasmonic acid, and salicylic acid. We propose a mechanism involving the three hormones by which N. benthamiana could activate an efficient defense response against D. dadantii.
eng
Copyright © 2016 Pérez-Bueno, Granum, Pineda, Flors, Rodriguez-Palenzuela, López-Solanilla and Barón.
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Dickeya dadantii
necrotroph
plant resistance
chlorophyll fluorescence imaging
multicolor fluorescence imaging
thermal imaging
Temporal and Spatial Resolution of Activated Plant Defense Responses in Leaves of Nicotiana benthamiana Infected with Dickeya dadantii
info:eu-repo/semantics/article
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