Development of disease caused by Phytophthora cinnamomi in mature Xanthorrhoe australis

Aberton, Michael, Wilson, Barbara, Hill, John and Cahill, David 2001, Development of disease caused by Phytophthora cinnamomi in mature Xanthorrhoe australis, Australian journal of botany, vol. 49, no. 2, pp. 209-219.

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Title Development of disease caused by Phytophthora cinnamomi in mature Xanthorrhoe australis
Author(s) Aberton, Michael
Wilson, Barbara
Hill, John
Cahill, David
Journal name Australian journal of botany
Volume number 49
Issue number 2
Start page 209
End page 219
Publisher CSIRO Publishing
Place of publication Melbourne, Vic.
Publication date 2001
ISSN 0067-1924
1444-9862
Summary Over the past 30 years, heathland and open forest communities in south-eastern Australia dominated by Xanthorrhoea australis R.Br. have been severely affected by disease caused by Phytophthora cinnamomi Rands. The disease has caused a sharp decline in numbers of individuals within populations of X. australis; however, the etiology of the disease is unclear. The characteristics and disease symptoms induced by P. cinnamomi were analysed within nine mature X. australis plants that had been removed from the field. Seven plants showed typical disease symptoms that ranged from chlorotic leaves through to plant death. Plants showing disease symptoms had different numbers of infected roots, ranging from 0% in one dead plant, 40% infected roots in a plant showing yellowing of leaf tips and 67 and 86%, respectively, in two plants with severe chlorosis. There was variation within the roots, with some infected close to the stem while others were infected at more distal regions. Within stems of all plants, P. cinnamomi was difficult to isolate but was found in the desmium and stem apex and was associated with massive lesions within the central area of the stem. The symptoms of disease in X. australis are caused by a combination of damage to tissues of the roots and stem that may lead to a reduction in water and mineral transport throughout the plant.
Language eng
Field of Research 060799 Plant Biology not elsewhere classified
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2001, CSIRO
Persistent URL http://hdl.handle.net/10536/DRO/DU:30001055

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