Relative roles of glyceollin, lignin and the hypersensitive response and the influence of ABA in compatible and incompatible interactions of soybeans with Phytophthora sojae

Mohr, Peter G. and Cahill, David 2001, Relative roles of glyceollin, lignin and the hypersensitive response and the influence of ABA in compatible and incompatible interactions of soybeans with Phytophthora sojae, Physiological and molecular plant pathology, vol. 58, pp. 31-41.

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Title Relative roles of glyceollin, lignin and the hypersensitive response and the influence of ABA in compatible and incompatible interactions of soybeans with Phytophthora sojae
Author(s) Mohr, Peter G.
Cahill, David
Journal name Physiological and molecular plant pathology
Volume number 58
Start page 31
End page 41
Publisher Academic Press
Place of publication London, England
Publication date 2001
ISSN 0885-5765
Keyword(s) Phytophthora sojae(Kaufmann and Gerdemann)
Glycine max L. [Merr.]
abscisic acid
glyceollin
lignin
hypersensitive response
Summary The relative roles of glyceollin, lignin and the hypersensitive response (HR) in pathogen containment and restriction were investigated in soybean (Glycine max L. [Merr.]) cultivars that were inoculated with Phytophthora sojae Kaufmann and Gerdemann. Concentrations of endogenous abscisic acid (ABA) levels in etiolated soybean hypocotyls were reduced by application of the ABA biosynthesis inhibitor norflurazon or raised by exogenous ABA application. Incompatible interactions in leaves and hypocotyls were characterized by HR, phenolic and lignin deposition and glyceollin accumulation. Compatible interactions resulted in light coloured, water-soaked spreading lesions with minimal lignin deposition or glyceollin accumulation and the absence of an HR. Norflurazon treatment restricted the spread of the pathogen and increased glyceollin accumulation in compatible tissues. Exogenous ABA addition caused spreading lesions in normally incompatible interactions and reduced glyceollin accumulation. Phenolic deposition and HR were unchanged by either treatment in incompatible or compatible interactions. The uncoupling of glyceollin synthesis from the HR and phenolic and lignin deposition by ABA and norflurazon treatment showed that glyceollin is a major factor in restriction of the pathogen during these interactions.
Notes Available online 25 February 2002.
Language eng
Field of Research 069999 Biological Sciences not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2001, Academic Press
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001052

Document type: Journal Article
Collection: School of Biological and Chemical Sciences
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