Plant Pathology (2001) 50, 211-217

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M. Venter, M.J. Wingfield, T.A. Coutinho and B.D. Wingfield (2001)
Molecular characterization of Endothia gyrosa isolates from Eucalyptus in South Africa and Australia
Plant Pathology 50 (2), 211-217
Abstract: Endothia gyrosa is a canker pathogen best known as the causal agent of pin oak blight in North America, and causes cankers on other woody hosts such as Castanea spp. and Liquidambar spp. In South Africa, Australia and Tasmania, a fungus identified as E. gyrosa has been recorded on Eucalyptus spp. Some morphological differences exist between the North American fungus and the isolates from Eucalyptus. Phylogenetic relationships between E. gyrosa from North America and E. gyrosa from South Africa and Australia, as well as that of the related fungi Cryphonectria parasitica and C. cubensis, were studied using PCR-based restriction fragment length polymorphism (RFLP) and sequences of the internal transcribed spacer (ITS) region of the rRNA operon. Endothia gyrosa isolates from South Africa produced the same RFLP banding patterns as those from Australia, which differed markedly from North American isolates of E. gyrosa. In a phylogram based on the DNA sequences, the Australian and South African isolates of E. gyrosa resided in a single, well resolved clade, distinct from North American isolates. Isolates of C. parasitica grouped in the same clade as the South African and Australian isolates of E. gyrosa, but C. cubensis was distantly related to them. The molecular data suggest that the E. gyrosa isolates from South Africa and Australia represent a distinct taxon, and probably belong to the genus Cryphonectria.
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Database assignments for author(s): Brenda D. Wingfield, Michael J. Wingfield, Teresa A. Coutinho

Research topic(s) for pests/diseases/weeds:

Pest and/or beneficial records:

Beneficial Pest/Disease/Weed Crop/Product Country Quarant.

Amphilogia gyrosa Eucalypt (Eucalyptus) Australia (South+SE)
Amphilogia gyrosa Eucalypt (Eucalyptus) South Africa