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The Biocontrol Root-Oomycete, Pythium Oligandrum, Triggers Grapevine Resistance and Shifts in the Transcriptome of the Trunk Pathogenic Fungus, Phaeomoniella Chlamydospora

1
INRAE, UMR 1065 Santé et Agroécologie du Vignoble (SAVE), Institut des Sciences de la vigne et du Vin (ISVV), 33883 Villenave d’Ornon, France
2
BIOVITIS, 15400 Saint-Étienne-de-Chomeil, France
3
Bioresources Unit, Center for Health & Bioresources, AIT Austrian Institute of Technology GmbH, Konrad Lorenz Strasse 24, 3430 Tulln, Austria
4
Institut des Sciences Analytiques et de Physicochimie pour l‘Environnement et les Matériaux—UMR 5254, Microbial Ecology, Université de Pau et des Pays de l’Adour/E2S UPPA/CNRS, IBEAS Avenue de l’Université, 64013 Pau, France
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2020, 21(18), 6876; https://doi.org/10.3390/ijms21186876
Received: 8 September 2020 / Accepted: 15 September 2020 / Published: 19 September 2020
(This article belongs to the Section Molecular Plant Sciences)
The worldwide increase in grapevine trunk diseases, mainly esca, represents a major threat for vineyard sustainability. Biocontrol of a pioneer fungus of esca, Phaeomoniella chlamydospora, was investigated here by deciphering the tripartite interaction between this trunk-esca pathogen, grapevine and the biocontrol-oomycete, Pythium oligandrum. When P. oligandrum colonizes grapevine roots, it was observed that the wood necroses caused by P. chlamydospora were significantly reduced. Transcriptomic analyses of plant and fungus responses were performed to determine the molecular events occurring, with the aim to relate P.chlamydospora degradation of wood to gene expression modulation. Following P. oligandrum-root colonization, major transcriptomic changes occurred both, in the grapevine-defense system and in the P. chlamydospore-virulence factors. Grapevine-defense was enhanced in response to P. chlamydospora attacks, with P. oligandrum acting as a plant-systemic resistance inducer, promoting jasmonic/ethylene signaling pathways and grapevine priming. P. chlamydospora pathogenicity genes, such as those related to secondary metabolite biosynthesis, carbohydrate-active enzymes and transcription regulators, were also affected in their expression. Shifts in grapevine responses and key-fungal functions were associated with the reduction of P. chlamydospora wood necroses. This study provides evidence of wood fungal pathogen transcriptional changes induced by a root biocontrol agent, P. oligandrum, in which there is no contact between the two microorganisms. View Full-Text
Keywords: grapevine; biocontrol; trunk disease; Pythium oligandrum; transcriptomic analyses grapevine; biocontrol; trunk disease; Pythium oligandrum; transcriptomic analyses
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MDPI and ACS Style

Yacoub, A.; Magnin, N.; Gerbore, J.; Haidar, R.; Bruez, E.; Compant, S.; Guyoneaud, R.; Rey, P. The Biocontrol Root-Oomycete, Pythium Oligandrum, Triggers Grapevine Resistance and Shifts in the Transcriptome of the Trunk Pathogenic Fungus, Phaeomoniella Chlamydospora. Int. J. Mol. Sci. 2020, 21, 6876. https://doi.org/10.3390/ijms21186876

AMA Style

Yacoub A, Magnin N, Gerbore J, Haidar R, Bruez E, Compant S, Guyoneaud R, Rey P. The Biocontrol Root-Oomycete, Pythium Oligandrum, Triggers Grapevine Resistance and Shifts in the Transcriptome of the Trunk Pathogenic Fungus, Phaeomoniella Chlamydospora. International Journal of Molecular Sciences. 2020; 21(18):6876. https://doi.org/10.3390/ijms21186876

Chicago/Turabian Style

Yacoub, Amira; Magnin, Noel; Gerbore, Jonathan; Haidar, Rana; Bruez, Emilie; Compant, Stéphane; Guyoneaud, Rémy; Rey, Patrice. 2020. "The Biocontrol Root-Oomycete, Pythium Oligandrum, Triggers Grapevine Resistance and Shifts in the Transcriptome of the Trunk Pathogenic Fungus, Phaeomoniella Chlamydospora" Int. J. Mol. Sci. 21, no. 18: 6876. https://doi.org/10.3390/ijms21186876

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