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Puccinia boroniae: Biological studies of the telial stage infecting Boronia in Western Australia

Driessen, S.A., O'Brien, P. and Hardy, G. (2003) Puccinia boroniae: Biological studies of the telial stage infecting Boronia in Western Australia. In: 8th International Congress of Plant Pathology: Solving problems in the real world, (ICPP 2003), 2 - 7 February, Christchurch; New Zealand.

Abstract

Puccinia boroniae, an obligate biotrophic rust pathogen, is the causative agent of Boronia rust. Many commercially grown species and cultivars of Boronia are susceptible, impacting on the export market's acceptance of harvested stems. Infection occurs usually during autumn and late spring, indicated by the development of distinct cinnamon to dark brown pustules (telial stage) on the leaves, stems and/or developing flower buds. Defoliation of the plant canopy may occur in severe infections. Despite intensive studies, only the telial stage (comprised of teliospores and mesospores) has been described to date. Current disease management protocols are only marginally adequate at controlling infection, due in part to our limited knowledge regarding the pathogen's biology, host specificity and pathogenicity. In order to sustain the current industry and allow for future expansion, improved disease management is vital, and involves developing a greater understanding of the pathogen. Preliminary studies into the biology of the telial stage are being undertaken. The objective of these studies is to examine the effect of temperature, light regimes, spore wetness and humidity on the germination of teliospores, and subsequent production and germination of basidiospores (if produced). Techniques and results from this research will be highlighted. The effect of the results on future studies into examining the host specificity and host/pathogen interaction will also be discussed.

Publication Type: Conference Item
Murdoch Affiliation: School of Biological Sciences and Biotechnology
Publisher: Horticulture Australia
URI: http://researchrepository.murdoch.edu.au/id/eprint/21262
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