Induction of defence mechanisms in grapevine leaves by emodin- and anthraquinone-rich plant extracts and their conferred resistance to downy mildew.

Full Abstract

The ability of two plant extracts, Rheum palmatum root extract (RPRE) and Frangula alnus bark extract (FABE), to protect Vitis vinifera leaves from Plasmopara viticola infection was evaluated. These natural products are toxic to the pathogen and induce defence reactions in a susceptible cultivar of V. vinifera (V. vinifera cv. Chasselas), including stilbenic phytoalexin accumulation, enhanced peroxidase (EC 1.11.1.7) activity, and a hypersensitive reaction. Inhibition of the first stage of biotrophic hyphal development of P. Viticola by the two plant extracts was observed. HPLC-DAD-MS analysis showed that these two natural extracts contain many phenolic compounds belonging to the anthraquinone family, such as rhein, frangulin A, emodin, aloe-emodin, chrysophanol, and physcion. Emodin alone is able to impair P. viticola development and to stimulate viniferins and the accumulation of pterostilbene.

Author information

Author/s: Godard, Sophie (S); Slacanin, Ivan (I); Viret, Olivier (O); Gindro, Katia (K);

Affiliation: Swiss Federal Research Station Agroscope Changins-Wädenswil, Route de Duillier, P.O. Box 1012, CH-1260 Nyon, Switzerland. sophie.godard(-atsign-)acw.admin.ch

Journal and publication information

Publication Type: Journal Article; Research Support, Non-U.S. Gov't

Journal: Plant physiology and biochemistry : PPB / Société française de physiologie végétale (Plant Physiol Biochem), published in France. (Language: eng)

Reference: 2009-Sep; vol 47 (issue 9) : pp 827-37

Dates: Created 2009/07/07; Completed 2009/09/10;

PMID: 19447634, status: MEDLINE (last retrieval date: 9/10/2009, IMS Date: )

Sourced from the National Library of Medicine. Abstract text and other information may be subject to copyright.

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MeSH headings (categories)

This article was linked to the MESH Headings shown below.

Associated Chemicals: Anthraquinones (0) ; Reactive Oxygen Species (0) ; Solvents (0) ; Stilbenes (0) ; resveratrol (501-36-0) ; Emodin (518-82-1) ; pterostilbene (537-42-8) ; Peroxidases (EC 1.11.1.-)

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