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Saccharomyces arboricolus sp. nov., a yeast species from tree bark

¹ Systematic Mycology and Lichenology Laboratory, Institute of Microbiology, Chinese Academy of Sciences, Beijing 100101, PR China
² Graduate School of the Chinese Academy of Sciences, Beijing 100039, PR China

Correspondence
Feng-Yan Bai
baify{at}im.ac.cn

Three ascomycetous yeast strains, H-6^T, ZX-15 and ZX-20, isolated from the bark of two tree species of the family Fagaceae collected from different regions of China, formed unconjugated and persistent asci containing two to four globose ascospores. 26S rDNA D1/D2 domain and internal transcribed spacer (ITS) region (including 5.8S rDNA) sequence analysis showed that they were closely related to the currently accepted Saccharomyces species with strong support. Comparisons of the rDNA sequences, electrophoretic karyotypes and physiological characters indicated that the three strains represent a novel species in the genus Saccharomyces. The name Saccharomyces arboricolus sp. nov. was proposed for the novel species, with H-6^T (=AS 2.3317^T=CBS 10644^T) isolated from the bark of Quercus fabri as the type strain.

The GenBank/EMBL/DDBJ accession numbers for the ITS region and 26S rRNA gene D1/D2 domain sequences of strain H-6^T are EF580917 and EF580918, respectively.

A supplementary table showing nucleotide mismatches in the D1/D2 domain and ITS region sequences between the type strains of Saccharomyces species is available with the online version of this paper.

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