Spathaspora brasiliensis sp. nov., Spathaspora suhii sp. nov., Spathaspora roraimanensis sp. nov. and Spathaspora xylofermentans sp. nov., four novel d-xylose-fermenting yeast species from Brazilian Amazonian forest
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Four new d-xylose fermenting yeast species of the clade Spathaspora were recovered from rotting-wood samples in a region of Amazonian forest, Northern Brazil. Three species produced unconjugated asci with a single elongated ascospore with curved ends. These species are described as Spathaspora brasiliensis, Spathaspora suhii and Spathaspora roraimanensis. Two isolates of an asexually reproducing species belonging to the Spathaspora clade were also obtained and they are described as Spathaspora xylofermentans. All these species are able to ferment d-xylose during aerobic batch growth in rich YP (1 % yeast extract, 2 % peptone and 2 % D-xylose) medium, albeit with differing efficiencies. The type strains are Spathaspora brasiliensis sp. nov UFMG-HMD19.3 (=CBMAI 1425=CBS 12679), Spathaspora suhii sp. nov. UFMG-XMD16.2 (=CBMAI 1426=CBS 12680), Spathaspora roraimanensis sp. nov. UFMG-XMD23.2 (CBMAI 1427=CBS 12681) and Spathaspora xylofermentans sp. nov. UFMG-HMD23.3 (=CBMAI 1428=CBS 12682).
KeywordsNew yeast species Spathaspora d-xylose-fermenting yeast Rotting wood Amazonian forest
This work was supported in part by grants and fellowships from the Brazilian agencies Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq, process no. 552877/2007-7, 551392/2010-0, 551245/2010-7, 560715/2010-2, and 490029/2009-4), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, Procad-NF, process no. 2280/2008), Fundação de Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG), Fundação de Amparo a Pesquisa do Estado de São Paulo (FAPESP/BIOEN/FAPEMIG, process no. 2008/57926-4), Fundação de Apoio à Pesquisa Científica e Tecnológica do Estado de Santa Catarina (FAPESC, process no. 17293/2009-6), and the Natural Science and Engineering Research Council of Canada (M.-A. L.).
Conflict of interest
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