Insights Into the Mechanisms Implicated in Pinus pinaster Resistance to Pinewood Nematode
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Other documents of the author: Modesto, Inês; Sterch, Lieven; Arbona, Vicent; Gomez-Cadenas, Aurelio; Carrasquinho, Isabel; Van de Peer, Yves; Miguel, Celia
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comunitat-uji-handle2:10234/2508
comunitat-uji-handle3:10234/6999
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Title
Insights Into the Mechanisms Implicated in Pinus pinaster Resistance to Pinewood NematodeAuthor (s)
Date
2021Publisher
Frontiers MediaISSN
1664-462XBibliographic citation
Modesto I, Sterck L, Arbona V, Gómez-Cadenas A, Carrasquinho I, Van de Peer Y and Miguel CM (2021) Insights Into the Mechanisms Implicated in Pinus pinaster Resistance to Pinewood Nematode. Front. Plant Sci. 12:690857. doi: 10.3389/fpls.2021.690857Type
info:eu-repo/semantics/articleVersion
info:eu-repo/semantics/publishedVersionSubject
Abstract
Pine wilt disease (PWD), caused by the plant–parasitic nematode Bursaphelenchus xylophilus, has become a severe environmental problem in the Iberian Peninsula with devastating effects in Pinus pinaster forests. Despite ... [+]
Pine wilt disease (PWD), caused by the plant–parasitic nematode Bursaphelenchus xylophilus, has become a severe environmental problem in the Iberian Peninsula with devastating effects in Pinus pinaster forests. Despite the high levels of this species' susceptibility, previous studies reported heritable resistance in P. pinaster trees. Understanding the basis of this resistance can be of extreme relevance for future programs aiming at reducing the disease impact on P. pinaster forests. In this study, we highlighted the mechanisms possibly involved in P. pinaster resistance to PWD, by comparing the transcriptional changes between resistant and susceptible plants after infection. Our analysis revealed a higher number of differentially expressed genes (DEGs) in resistant plants (1,916) when compared with susceptible plants (1,226). Resistance to PWN is mediated by the induction of the jasmonic acid (JA) defense pathway, secondary metabolism pathways, lignin synthesis, oxidative stress response genes, and resistance genes. Quantification of the acetyl bromide-soluble lignin confirmed a significant increase of cell wall lignification of stem tissues around the inoculation zone in resistant plants. In addition to less lignified cell walls, susceptibility to the pine wood nematode seems associated with the activation of the salicylic acid (SA) defense pathway at 72 hpi, as revealed by the higher SA levels in the tissues of susceptible plants. Cell wall reinforcement and hormone signaling mechanisms seem therefore essential for a resistance response. [-]
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Frontiers in Plant Science 12:690857Funder Name
Fundação para a Ciência e a Tecnologia | BioISI
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UID/Multi/04551/2013 | UIDB/04046/2020 | UIDP/04046/2020 | IF/01168/2013 | SFRH/BD/111687/2015 (to IM) | PTDC/BAA-MOL/28379/2017 | LISBOA-01-0145-FEDER-028379
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Except where otherwise noted, this item's license is described as © 2021 Modesto, Sterck, Arbona, Gómez-Cadenas, Carrasquinho, Van de Peer and Miguel. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.