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Aeroponic chambers for investigating the influence of low oxygen levels on infection development in roots of Eucalyptus marginata infected with Phytophthora cinnamomi

Burgess, T., McComb, J.A., Hardy, G.E.St.J. and Colquhoun, I. (1997) Aeroponic chambers for investigating the influence of low oxygen levels on infection development in roots of Eucalyptus marginata infected with Phytophthora cinnamomi. In: 11th Biennial Conference of the Australasian Plant Pathology Society, 29 September - 2 October, Perth, Western Australia.

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Abstract

P. cinnamomi is a major pathogen of E. marginata (Jarrah) in Western Australia. It can kill trees of all ages through infection of roots or by girdling the trunks of 1-7 yr old trees in situations where the collar is ponded. Field observations have indicated that periods of waterlogging (low oxygen) can result in the rapid death of trees from P. cinnamomi. Flooded soils are assumed to increase disease severity by increasing the mobility of zoospores and by adversely affecting host physiology resulting in pre-disposition to disease or poor regeneration of damaged roots.

Soil-based studies do not allow precise control of soil oxygen levels or observation of the effect of low oxygen on root development and subsequent infection development. Thus, an aeroponic system was designed to evaluate the influence of low oxygen on disease development in clonal E. marginata infected with P. cinnamomi.

Publication Type: Conference Item
Murdoch Affiliation: School of Biological and Environmental Sciences
URI: http://researchrepository.murdoch.edu.au/id/eprint/12987
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