Electronic Journal of Polish Agricultural Universities (EJPAU) founded by all Polish Agriculture Universities presents original papers and review articles relevant to all aspects of agricultural sciences. It is target for persons working both in science and industry,regulatory agencies or teaching in agricultural sector. Covered by IFIS Publishing (Food Science and Technology Abstracts), ELSEVIER Science - Food Science and Technology Program, CAS USA (Chemical Abstracts), CABI Publishing UK and ALPSP (Association of Learned and Professional Society Publisher - full membership). Presented in the Master List of Thomson ISI.

Copyright © Wydawnictwo Akademii Rolniczej we Wroclawiu, ISSN 1505-0297

Chmielewska J. 2003. SELECTED BIOTECHNOLOGICAL FEATURES OF HYBRIDS OF SACCHAROMYCES CEREVISIAE AND YAMADAZYMA STIPITIS, EJPAU 6/issue1/volume6(1), #01.
Available Online: http://www.ejpau.media.pl/volume6/issue1/volume6/issue1/biotechnology/abs-01.html

ABSTRACT

The aim of the research was to investigate the possibility of the use of interspecific hybrids of yeast in ethanol fermentation of media containing xylose. Distilling yeast Saccharomyces cerevisiae D43, xylose fermenting yeast Yamadazyma stipitis ATCC 58376 and their hybrids: YD43-4, YD43-6, YD43-11 and YD43-12 were used as biological material. The parental strain Yamadazyma stipitis ATCC 58376 produced 0.389 g ethanol from 1 g xylose. The hybrids YD43-6 and YD43-11 did not statistically differ from Yamadazyma stipitis in respect to efficiency of ethanol from xylose, but produced less xylitol. In the model medium, with the ratio of glucose to xylose (7:3) corresponding to lignocellulitic hydrolysates, the hybrid YD43-6 produced the most ethanol (0.377 g/g).

Key words: distilling, distilling yeast, protoplast fusion, xylose fermentation.

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