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Author (up) Timmermann, T.; Armijo, G.; Donoso, R.; Seguel, A.; Holuigue, L.; Gonzalez, B.
Title Paraburkholderia phytofirmans PsJN Protects Arabidopsis thaliana Against a Virulent Strain of Pseudomonas syringae Through the Activation of Induced Resistance Type Journal Article
Year 2017 Publication Molecular Plant-Microbe Interactions Abbreviated Journal Mol. Plant-Microbe Interact.
Volume 30 Issue 3 Pages 215-230
Keywords
Abstract Paraburkholderia phytofirmans PsJN is a plant growth promoting rhizobacterium (PGPR) that stimulates plant growth and improves tolerance to abiotic stresses. This study analyzed whether strain PsJN can reduce plant disease severity and proliferation of the virulent strain Pseudomonas syringae pv. tomato DC3000, in Arabidopsis plants, through the activation of induced resistance. Arabidopsis plants previously exposed to strain PsJN showed a reduction in disease severity and pathogen proliferation in leaves compared with noninoculated, infected plants. The plant defense related genes WRKY54, PR1, ERFI, and PDF1.2 demonstrated increased and more rapid expression in strain PsJN-treated plants compared with noninoculated, infected plants. Transcriptional analyses and functional analysis using signaling mutant plants suggested that resistance to infection by DC3000 in plants treated with strain PsJN involves salicylic acid, jasmonate-, and ethylene-signaling pathways to activate defense genes. Additionally, activation occurs through a specific PGPR-host recognition, being a necessary metabolically active state of the bacterium to trigger the resistance in Arabidopsis, with a strain PsJN associated molecular pattern only partially involved in the resistance response. This study provides the first report on the mechanism used by the PGPR P. phytofirmans PsJN to protect A. thaliana against a widespread virulent pathogenic bacterium.
Address [Timmermann, Tania; Donoso, Raul; Gonzalez, Bernardo] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Lab Bioingn, Santiago, Chile, Email: bernardo.gonzalez@uai.cl
Corporate Author Thesis
Publisher Amer Phytopathological Soc Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0894-0282 ISBN Medium
Area Expedition Conference
Notes WOS:000399265100005 Approved no
Call Number UAI @ eduardo.moreno @ Serial 720
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