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Characterization of New Zealand isolates of Chondrostereum purpureum with regard to morphology, growth, pathogenicity and RAPD banding patterns

Published online by Cambridge University Press:  01 April 2000

A. G. SPIERS ,
D. T. BREWSTER ,
A. SLADE  and
S. E. GARDINER
A. G. SPIERS
Affiliation:
The Horticulture and Food Research Institute of New Zealand, Palmerston North Research Centre, Private Bag 11 030, Palmerston North, New Zealand. E-mail: [email protected]
D. T. BREWSTER
Affiliation:
The Horticulture and Food Research Institute of New Zealand, Palmerston North Research Centre, Private Bag 11 030, Palmerston North, New Zealand. E-mail: [email protected]
A. SLADE
Affiliation:
The Horticulture and Food Research Institute of New Zealand, Palmerston North Research Centre, Private Bag 11 030, Palmerston North, New Zealand. E-mail: [email protected]
S. E. GARDINER
Affiliation:
The Horticulture and Food Research Institute of New Zealand, Palmerston North Research Centre, Private Bag 11 030, Palmerston North, New Zealand. E-mail: [email protected]
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Abstract

Isolates of Chondrostereum purpureum were characterised on malt agar by rapid growth of white, flat, velvety to cottony mycelium and formation of yellow fruitbody crusts with apiculate basidiospores. The presence of cystidia was diagnostic, but not a reliable taxonomic character. Above 33 °C isolates exhibited a differential growth response and only three failed to grow following 20 d incubation at 36°. Tolerance of high temperature was not correlated with RAPD banding patterns nor geographic origin. All isolates were pathogenic to willow, poplar and apple regardless of their original host, locality or RAPD profiles. No zones of demarcation were observed following infection of wounds by multiple isolates. RAPD banding patterns exhibited considerable diversity, enabling discrimination of isolates with single primers, and this was indicative of the extensive genetic diversity within the NZ population. No RAPD banding combinations specific to host species or locality were observed. An explanation is given for the wide dissemination of C. purpureum isolates throughout NZ.

Type
Research Article
Information
Mycological Research , Volume 104 , Issue 4 , April 2000 , pp. 395 - 402
Copyright
© The British Mycological Society 2000

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