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The occurrence of an undescribed species of Venturia in blighted shoots of Populus tremula

Published online by Cambridge University Press:  21 May 2001

Risto KASANEN ,
Jarkko HANTULA  and
Timo KURKELA
Risto KASANEN
Affiliation:
Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland. E-mail: risto.kasanen@metla.fi
Jarkko HANTULA
Affiliation:
Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland. E-mail: risto.kasanen@metla.fi
Timo KURKELA
Affiliation:
Finnish Forest Research Institute, P.O. Box 18, FIN-01301 Vantaa, Finland. E-mail: risto.kasanen@metla.fi
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Abstract

Morphological characters and genetic markers from 35 single-ascospore isolates of a Venturia sp. collected from Populus tremula were analysed. The morphological data were compared with the literature, and genetic markers were amplified for comparison with isolates of V. populina, V. macularis and V. ditricha. According to ascospore morphology the fungus resembled V. populina, but the morphology of the conidia was closer to Pollaccia radiosa (the anamorph of V. macularis). Analysis of 49 RAMS markers, variation within the internal transcribed spacer (ITS) sequence of the ribosomal gene cluster and a single marker locus derived from RAMS fingerprint suggested that the Venturia is a previously undescribed species.

Type
Research Article
Information
Mycological Research , Volume 105 , Issue 3 , March 2001 , pp. 338 - 343
Copyright
© The British Mycological Society 2001

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