Journal
ANTONIE VAN LEEUWENHOEK INTERNATIONAL JOURNAL OF GENERAL AND MOLECULAR MICROBIOLOGY
Volume 108, Issue 4, Pages 919-931Publisher
SPRINGER
DOI: 10.1007/s10482-015-0546-8
Keywords
Yeasts; Xylitol; Galapagos archipelago; D-xylose conversion; Sugarcane bagasse hemicellulose hydrolysate; Cyberlindnera galapagoensis sp nov.
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq - Brazil)
- Fundacao do Amparo a Pesquisa do Estado de Minas Gerais (FAPEMIG)
- Fundacao do Amparo a Pesquisa do Estado de Sao Paulo (FAPESP)
- Financiadora de Estudos e Projetos (FINEP) [2084/07]
- Pontificia Universidad Catolica del Ecuador
- SENESCYT
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This study evaluated d-xylose-assimilating yeasts that are associated with rotting wood from the Galapagos Archipelago, Ecuador, for xylitol production from hemicellulose hydrolysates. A total of 140 yeast strains were isolated. Yeasts related to the clades Yamadazyma, Kazachstania, Kurtzmaniella, Lodderomyces, Metschnikowia and Saturnispora were predominant. In culture assays using sugarcane bagasse hemicellulose hydrolysate, Candida tropicalis CLQCA-24SC-125 showed the highest xylitol production, yield and productivity (27.1 g L-1 xylitol, Y (p/s) (xyl) = 0.67 g g(-1), Q(p) = 0.38 g L-1. A new species of Cyberlindnera, strain CLQCA-24SC-025, was responsible for the second highest xylitol production (24 g L-1, Y (p/s) (xyl) = 0.64 g g(-1), Q(p) = 0.33 g L-1 h(-1)) on sugarcane hydrolysate. The new xylitol-producing species Cyberlindnera galapagoensis f.a., sp. nov., is proposed to accommodate the strain CLQCA-24SC-025(T) (=UFMG-CM-Y517(T); CBS 13997(T)). The MycoBank number is MB 812171.
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