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Botryosphaeria species from Eucalyptus in Australia are pleoanamorphic, producing Dichomera synanamorphs in culture

Published online by Cambridge University Press:  10 November 2005

Paul A. BARBER ,
Treena J. BURGESS ,
Giles E. St.J. HARDY ,
Bernard SLIPPERS ,
Philip J. KEANE  and
Michael J. WINGFIELD
Paul A. BARBER
Affiliation:
Department of Botany, La Trobe University, Victoria, Australia 3086. E-mail: [email protected] Present address: School of Biological Sciences & Biotechnology, Murdoch University, Murdoch, Western Australia, Australia 6150
Treena J. BURGESS
Affiliation:
School of Biological Sciences & Biotechnology, Murdoch University, Murdoch, Western Australia, Australia 6150.
Giles E. St.J. HARDY
Affiliation:
School of Biological Sciences & Biotechnology, Murdoch University, Murdoch, Western Australia, Australia 6150.
Bernard SLIPPERS
Affiliation:
Department of Forest Mycology and Pathology, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Philip J. KEANE
Affiliation:
Department of Botany, La Trobe University, Victoria, Australia 3086. E-mail: [email protected]
Michael J. WINGFIELD
Affiliation:
Department of Microbiology and Plant Pathology, Forestry and Agricultural Biotechnology Institute, Faculty of Natural and Agricultural Sciences, University of Pretoria, Pretoria, South Africa.
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Abstract

Species within the genus Botryosphaeria include some of the most widespread and important pathogens of woody plants, and have been the focus of numerous taxonomic studies in recent years. It is currently accepted that anamorphs of Botryosphaeria belong to two distinct genera, Fusicoccum and Diplodia. Species within the genus Fusicoccum commonly produce aseptate, hyaline conidia. In the present study, fungi were isolated from foliage and wood of Eucalyptus in native forests and plantations in Australia. Although these fungi produced Dichomera anamorphs in culture, they clustered within the Fusicoccum clade of Botryosphaeria based on their ITS sequence data. Four species, Botryosphaeria dothidea, B. parva, B. ribis and B. australis produced Dichomera conidia in culture. The Dichomera synanamorphs are described for these four species of Botryosphaeria. In addition, falling within the Fusicoccum clade of Botryosphaeria, two species were found to be distinct from previously described Botryosphaeria spp. based on their ITS sequences, but synonymous with D. versiformis and D. eucalypti. These observations are currently unique to isolates from host trees within the genus Eucalyptus in Australia, and the pleoanamorphic nature of these species is discussed.

Type
Research Article
Information
Mycological Research , Volume 109 , Issue 12 , December 2005 , pp. 1347 - 1363
Copyright
The British Mycological Society 2005

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