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Teratosphaeria pseudoeucalypti, new cryptic species responsible for leaf blight of Eucalyptus in subtropical and tropical Australia

Andjica , V. and Pegg, G.S. and Carnegie, A.J. and Callister, A. and StJ Hardy, G.E. and Burgess, T.I. (2010) Teratosphaeria pseudoeucalypti, new cryptic species responsible for leaf blight of Eucalyptus in subtropical and tropical Australia. Plant Pathology, 59 (5). pp. 900-912.

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Article Link(s): http://dx.doi.org/10.1111/j.1365-3059.2010.02308.x

Publisher URL: http://onlinelibrary.wiley.com/

Abstract

Sub-tropical and tropical plantations of Eucalyptus grandis hybrids in eastern Australia have been severely affected by anamorphs of Teratosphaeria (formerly Kirramyces) causing a serious leaf blight disease. Initially the causal organism in Queensland, Australia, was identified as Teratosphaeria eucalypti, a known leaf parasite of endemic Eucalyptus spp. However, some inconsistencies in symptoms, damage and host range suggested that the pathogen in Queensland may be a new species. Isolates of T. eucalypti from throughout its known endemic range, including Queensland and New Zealand, where it is an exotic pathogen, were compared using multiple gene phylogenies. Phylogenetic studies revealed that the species responsible for leaf blight in Queensland represents a new taxon, described here as Teratosphaeria pseudoeucalypti. While the DNA sequence of T. pseudoeucalypti was more similar to T. eucalypti, the symptoms and cultural characteristics resembled that of T. destructans. The impact of this disease in central Queensland has increased annually and is the major threat to the eucalypt plantation industry in the region.

Item Type:Article
Business groups:Agri-Science, Horticulture and Forestry Science
Additional Information:© 2010 The Authors. Plant Pathology © 2010 BSPP.
Keywords:Clone evaluation; DNA sequence; Eucalyptus species; haplotypes; kirramyces leaf blight; phylogeographic analysis; plantations.
Subjects:Forestry
Plant pests and diseases
Deposited On:29 Aug 2011 07:12
Last Modified:06 Sep 2011 03:32

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