Ecotypic variation in the response of Arabidopsis thaliana to Phytophthora cinnamomi

Robinson, Louise and Cahill, David 2003, Ecotypic variation in the response of Arabidopsis thaliana to Phytophthora cinnamomi, Australasian plant pathology, vol. 32, no. 1, pp. 53-64.

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Title Ecotypic variation in the response of Arabidopsis thaliana to Phytophthora cinnamomi
Formatted title Ecotypic variation in the response of Arabidopsis thaliana to Phytophthora cinnamomi
Author(s) Robinson, Louise
Cahill, David
Journal name Australasian plant pathology
Volume number 32
Issue number 1
Start page 53
End page 64
Publisher Australasian Plant Pathology Society
Place of publication Adelaide, S. Aust.
Publication date 2003
ISSN 0815-3191
1448-6032
Keyword(s) non-host resistance
reactive oxygen species
callose
hydrogen peroxide
Summary A variety of reactions to inoculation with Phytophthora cinnamomi ranging from high susceptibility to moderate resistance were found in 20 ecotypes of Arabidopsis thaliana. P. cinnamomi zoospores successfully colonised both root and leaf tissue of Arabidopsis and sporulation in the form of chlamydospores and sporangia occurred in leaves and roots of each ecotype but the number varied considerably between ecotypes. In the more susceptible ecotypes, colonisation was characterised by rapid intercellular growth and sporulation of the pathogen from 48 h post inoculation. In less susceptible ecotypes, P. cinnamomi was limited to a defined region within tissues. In response to P. cinnamomi infection, several ecotypes expressed active defence responses in both root and leaf tissue. Callose formation was closely associated with lesion restriction as was the production of the reactive oxygen species, hydrogen peroxide. The oxidative burst was not limited to the site of pathogen ingress but also occurred in distant, uninfected tissues. We have characterised an Arabidopsis–P. cinnamomi system that will be useful for further studies of active resistance mechanisms.
Language eng
Field of Research 060704 Plant Pathology
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2003, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001994

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