Further biochemical characterization of induced resistance of cucumber to Colletotrichum lagenarium

Induced resistance can develop in plants after infection by a pathogen or exposure to an elicitor. Induced resistance is often characterized by a systemic accumulation of PR proteins and enhanced ability to respond to subsequent infection. The induced resistance response of cucumber to Colletotrichu...

Full description

Saved in:
Bibliographic Details
Published in:Phytopathology 2006-06, Vol.96 (6), p.S50-S50
Main Authors: Hollosy, SI, Hammerschmidt, R
Format: Article
Language:English
Subjects:
Colletotrichum lagenarium
Cucumis sativus
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Induced resistance can develop in plants after infection by a pathogen or exposure to an elicitor. Induced resistance is often characterized by a systemic accumulation of PR proteins and enhanced ability to respond to subsequent infection. The induced resistance response of cucumber to Colletotrichum lagenarium, the cause of cucumber anthracnose, has been extensively studied. However, changes in soluble phenolic compounds have not been evaluated in this system. The cotyledons and first leaves of cucumber plants were induced by inoculation with C. lagenarium or with acibenzolar-s-methyl and upper leaves were examined for changes in PR proteins and soluble phenolic compounds. Intercellular fluids from the second and third leaves were analyzed for PR proteins. Phenolic compounds were extracted from induced leaves. Inoculated plants had significantly higher activity of chitinase and peroxidase than control plants, thus showing induced resistance was activated. The concentrations of total and ortho-dihydroxy phenol were lower in the inoculated plants versus control plants.
ISSN:0031-949X