Antonie van Leeuwenhoek

, Volume 108, Issue 4, pp 919–931

Xylitol production by yeasts isolated from rotting wood in the Galápagos Islands, Ecuador, and description of Cyberlindnera galapagoensis f.a., sp. nov.

  • Maria C. Guamán-Burneo
  • Kelly J. Dussán
  • Raquel M. Cadete
  • Monaliza A. M. Cheab
  • Patricia Portero
  • Enrique J. Carvajal-Barriga
  • Sílvio S. da Silva
  • Carlos A. Rosa
Original Paper

Abstract

This study evaluated d-xylose-assimilating yeasts that are associated with rotting wood from the Galápagos 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, Yp/sxyl = 0.67 g g−1, Qp = 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, Yp/sxyl = 0.64 g g−1, Qp = 0.33 g L−1 h−1) on sugarcane hydrolysate. The new xylitol-producing species Cyberlindneragalapagoensis f.a., sp. nov., is proposed to accommodate the strain CLQCA-24SC-025T (=UFMG-CM-Y517T; CBS 13997T). The MycoBank number is MB 812171.

Keywords

Yeasts Xylitol Galápagos archipelago d-xylose conversion Sugarcane bagasse hemicellulose hydrolysate Cyberlindneragalapagoensis sp. nov. 

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Maria C. Guamán-Burneo
    • 1
    • 2
  • Kelly J. Dussán
    • 3
  • Raquel M. Cadete
    • 1
  • Monaliza A. M. Cheab
    • 1
  • Patricia Portero
    • 2
  • Enrique J. Carvajal-Barriga
    • 2
  • Sílvio S. da Silva
    • 3
  • Carlos A. Rosa
    • 1
  1. 1.Departamento de Microbiologia, Instituto de Ciências BiológicasUniversidade Federal de Minas GeraisBelo HorizonteBrazil
  2. 2.Centro Neotropical para Investigación de la BiomasaPontificia Universidad Católica del EcuadorQuitoEcuador
  3. 3.Departamento de Biotecnologia, Escola de Engenharia de LorenaUniversidade de São PauloSão PauloBrazil

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