1887

Abstract

Seven phylloplane yeast strains that were collected in the Arrábida Natural Park, Portugal, and identified preliminarily as , the anamorphic stage of , were investigated. In contrast to , these isolates produced a brownish pigment when grown on potato dextrose agar. The pigment caused darkening of the cultures and diffused into the culture medium. Mating studies revealed that the Arrábida isolates did not react with the different mating types of , but were sexually compatible with them and produced mycelium with clamp connections, haustoria and transversally septate basidia that ejected the basidiospores. Various taxonomic criteria that were evaluated during the present study and comparison with other sexual taxa of the Tremellales indicated that this teleomorph should be classified in a novel genus. Therefore, gen. nov., sp. nov. (type strain, PYCC 5690=CBS 9648) is proposed. In addition, during the course of this investigation, a member of a novel species, sp. nov. (type strain, PYCC 4534=CBS 2013), was found among collection isolates that were identified formerly as . In molecular phylogenetic analysis of the D1/D2 domains of the 26S rDNA and the internal transcribed spacer region, the two taxa were found to be closely related, but distinct at the species level.

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2004-05-01
2024-03-29
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