A Plant Extract Acts Both as a Resistance Inducer and an Oomycide Against Grapevine Downy Mildew

Protecting vineyards from cryptogamic diseases such as downy mildew, caused by , generally requires a massive use of phytochemicals. However, the issues on unintentional secondary effects on environment and human health, and the occurrence of resistant strains, are leading to the development of alte...

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Published in:Frontiers in Plant Science Vol. 9; pp. 1085 - 14
Main Authors: Krzyzaniak, Yuko, Trouvelot, Sophie, Negrel, Jonathan, Cluzet, Stéphanie, Valls, Josep, Richard, Tristan, Bougaud, Ambrine, Jacquens, Lucile, Klinguer, Agnès, Chiltz, Annick, Adrian, Marielle, Heloir, Marie-Claire
Format: Journal Article
Language:English
Published: Switzerland Frontiers Media SA 25.07.2018
Frontiers
Frontiers Media S.A
Subjects:
[SDE]Environmental Sciences
[SDV.BV]Life Sciences [q-bio]/Vegetal Biology
[SDV.IDA]Life Sciences [q-bio]/Food engineering
[SDV]Life Sciences [q-bio]
[SPI.GPROC]Engineering Sciences [physics]/Chemical and Process Engineering
Airborne microorganisms
biocontrol
Biological control
Cell suspensions
Chemical and Process Engineering
Downy mildew
Engineering Sciences
Environmental effects
Environmental Sciences
Essential oils
Experiments
Food engineering
Gene expression
Gene regulation
Grapevines
Hydrogen peroxide
induced resistance
Life Sciences
oomycide
Pathogenesis
Pathogenesis-related proteins
Pathogens
Plant culture
Plant extracts
plant protection
Plant Science
Plasmopara viticola
Resveratrol
SB1-1110
Stilbene
Stilbene synthase
Stomata
Toxicity
Vegetal Biology
Vitis vinifera
Wineries & vineyards
Zoospores
France
induced resistance
elicitor
Plasmopara viticola
Vitis vinifera
biocontrol
oomycide
plant protection
ISSN:1664-462X, 1664-462X
Online Access:Get full text
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Summary:Protecting vineyards from cryptogamic diseases such as downy mildew, caused by , generally requires a massive use of phytochemicals. However, the issues on unintentional secondary effects on environment and human health, and the occurrence of resistant strains, are leading to the development of alternative strategies, such as the use of biocontrol products. In this paper, we evidenced the ability of a plant extract to protect grapevine from . Further experiments carried out both on cell suspensions and on plants revealed that plant extract activates typical defense-related responses such as the production of H O , the up-regulation of genes encoding pathogenesis-related proteins and stilbene synthase, as well as the accumulation of resveratrol or its derivative piceid. We also brought to light a strong direct effect of PE on the release and motility of zoospores. Furthermore, we found out that PE application left dried residues on leaf surface, impairing zoospores to reach stomata. Altogether, our results highlight the different modes of action of a new biocontrol product able to protect grapevine against downy mildew.
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Edited by: Yi Li, Peking University, China
This article was submitted to Plant Microbe Interactions, a section of the journal Frontiers in Plant Science
Reviewed by: Stéphane Compant, Austrian Institute of Technology, Austria; Mostafa Abdelwahed Abdelrahman, Tottori University, Japan
ISSN:1664-462X
1664-462X
DOI:10.3389/fpls.2018.01085