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Int J Syst Evol Microbiol 54 (2004), 1401-1407; DOI  10.1099/ijs.0.03037-0
© 2004 International Union of Microbiological Societies

Curvibasidium cygneicollum gen. nov., sp. nov. and Curvibasidium pallidicorallinum sp. nov., novel taxa in the Microbotryomycetidae (Urediniomycetes), and their relationship with Rhodotorula fujisanensis and Rhodotorula nothofagi

José Paulo Sampaio1, Wladyslav I. Golubev2, Jack W. Fell3, Mário Gadanho1 and Nikita W. Golubev4

1 Centro de Recursos Microbiológicos, Secção Autónoma de Biotecnologia, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal
2 Russia Collection of Microorganisms, Institute for Biochemistry and Physiology of Microorganisms, Russian Academy of Sciences, Pushchino 142290, Russia
3 Rosenstiel School of Marine and Atmospheric Science, University of Miami, 4600 Rickenbacker Causeway, Key Biscayne, FL 33419, USA
4 Mendeleev Chemical–Technological University, Moscow 125820, Russia

Correspondence
José Paulo Sampaio
jss{at}fct.unl.pt

Strains of Rhodotorula fujisanensis (Basidiomycota, Urediniomycetes, Microbotryomycetidae), including the type strain, are sexually compatible and produce clamped mycelium with teliospores. However, as teliospore germination had not been documented, the complete sexual cycle was not known. During the course of this work, the basidial stage of R. fujisanensis was characterized. In addition, mating studies employing isolates that were identified preliminarily as Rhodotorula nothofagi, a species that is related closely to R. fujisanensis, yielded mycelium with teliospores, which formed basidia and basidiospores. The new data were evaluated by using several criteria, including the available molecular phylogenetic framework for the Microbotryomycetidae. Curvibasidium gen. nov. is described here, to accommodate two teleomorphs: Curvibasidium cygneicollum sp. nov. (CBS 4551T), which is described as the sexual stage of R. fujisanensis, and Curvibasidium pallidicorallinum sp. nov. (CBS 9091T), which is related closely to R. nothofagi, but does not represent its sexual stage.

Abbreviations: ITS, internal transcribed spacer

Published online ahead of print on 5 March 2004 as DOI 10.1099/ijs.0.03037-0.

The GenBank/EMBL/DDBJ accession numbers for the sequences described in this work are as follows: AY383746, AY383747 and AY383748 (complete ITS region sequences of Curvibasidium pallidicorallinum CBS 6231, VKM Y-2861 and VKM Y-1135, respectively); AY383749 (complete ITS region sequence of Rhodotorula nothofagi A45); and AY383750 and AY383751 (partial 26S rRNA gene sequences of Rhodotorula ingeniosa CBS 6728 and Rhodotorula sp. CBS 4858, respectively).






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