Abstract:
:Wild-type strains of the thermotolerant methylotrophic yeast Hansenula polymorpha are able to ferment glucose, cellobiose and xylose to ethanol. H. polymorpha most actively fermented sugars to ethanol at 37 degrees C, whereas the well-known xylose-fermenting yeast Pichia stipitis could not effectively ferment carbon substrates at this temperature. H. polymorpha even could ferment both glucose and xylose up to 45 degrees C. This species appeared to be more ethanol tolerant than P. stipitis but more susceptible than Saccharomyces cerevisiae. A riboflavin-deficient mutant of H. polymorpha increased its ethanol productivity from glucose and xylose under suboptimal supply with riboflavin. Mutants of H. polymorpha defective in alcohol dehydrogenase activity produced lower amounts of ethanol from glucose, whereas levels of ethanol production from xylose were identical for the wild-type strain and the alcohol dehydrogenase-defective mutant.
journal_name
FEMS Yeast Resjournal_title
FEMS yeast researchauthors
Ryabova OB,Chmil OM,Sibirny AAdoi
10.1016/S1567-1356(03)00146-6keywords:
subject
Has Abstractpub_date
2003-11-01 00:00:00pages
157-64issue
2eissn
1567-1356issn
1567-1364pii
S1567135603001466journal_volume
4pub_type
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