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The role of phosphite in inducing resistance to Phytophthora cinnamomi in Arabidopsis thaliana

Eshraghi, L., McComb, J.A., Hardy, G.E.St.J. and O'Brien, P.A. (2008) The role of phosphite in inducing resistance to Phytophthora cinnamomi in Arabidopsis thaliana. In: ICPP 2008 9th International Congress of Plant Pathology, 24 - 29 August, Torino, Italy,.

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Abstract

Application of phosphite (phosphoric acid) to plants induces resistance to infection by oomycete pathogens (Phytophthora, Pythium, Bremia, Peronospora). In this study, the mechanism(s) underlying the ability of phosphite to protect plants against infection by Phytophthora brassicae and Phytophthora cinnamomi was investigated using Arabidopsis thaliana as a model. Resistance was assessed by comparing indicators such as callose formation, hyphal length, and production of hydrogen peroxide. Induction of host defence gene expression was measured with quantitative PCR using PPR and EF1α as housekeeping genes. Application of phosphite to the plants resulted in a greater than 2.5 fold increase in expression of the PR1 gene. The results of analysing other defence genes will be presented.

Publication Type: Conference Item
Murdoch Affiliation: Centre for Phytophthora Science and Management
School of Biological Sciences and Biotechnology
URI: http://researchrepository.murdoch.edu.au/id/eprint/7102
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