A new conifer-inhabiting species of Ceratocystis from Norway
Abstract
A new species, Ceratocystis norvegica J. Reid & Hausner sp. nov., is described from Norway. Based on morphological criteria and analyses of rDNA internal transcribed spacer and small subunit rDNA sequences, strains collected from galleries of the bark beetle Ips typographus on Picea abies (L.) H. Karst, were shown to be distinct both from members of the Ceratocystis coerulescens complex and from other species described previously from conifers. Ceratocystis norvegica has the following defining characteristics: convergent ostiolar hyphae; a sharply defined temperature optimum at 20 °C; an apparent lack of a conidial state; and ascospores that on germination produce either self-fertile or self-sterile strains.
Résumé
Les auteurs décrivent une nouvelle espèce, le Ceratocystis norvegica J. Reid & Hausner sp. nov., provenant de Norvège. À partir de critères morphologiques et d'analyses d'ITS du rADN et de séquences rSSU, on démontre que des souches récoltées à partir de galeries du scolyte Ips typographus sur Picea abies se distinguent à la fois des membres du complexe Ceratocystis coerulescens et d'autres espèces déjà décrites à partir d'autres conifères. Le Ceratocystis norvegica possède les caractéristiques suivantes : hyphes ostiolaires convergents; une température optimale de 20 °C nettement déterminée; une absence apparente de stade conidien; et des ascospores qui produisent après germination, des souches soit auto fertiles ou soit auto stériles.
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Published In
Botany
Volume 88 • Number 11 • November 2010
Pages: 971 - 983
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Received: 2 February 2010
Accepted: 28 September 2010
Version of record online: 19 November 2010
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J.ReidJ. Reid, M.IranpourM. Iranpour, S. M.RudskiS.M. Rudski, P. C.LoewenP.C. Loewen, and G.HausnerG. Hausner. 2010. A new conifer-inhabiting species of Ceratocystis from Norway. Botany. 88(11): 971-983. https://doi.org/10.1139/B10-069