@article{mbs:/content/journal/micro/10.1099/00221287-129-8-2495, author = "Maleszka, Ryszard and James, Allen P. and Schneider, Henry", title = "Ethanol Production from Various Sugars by Strains of Pachysolen tannophilus Bearing Different Numbers of Chromosomes", journal= "Microbiology", year = "1983", volume = "129", number = "8", pages = "2495-2500", doi = "https://doi.org/10.1099/00221287-129-8-2495", url = "https://www.microbiologyresearch.org/content/journal/micro/10.1099/00221287-129-8-2495", publisher = "Microbiology Society", issn = "1465-2080", type = "Journal Article", abstract = "Increasing chromosome number of Pachysolen tannophilus above the haploid level increased the yield of ethanol from d-xylose. There was a large increment on going from the haplophase to the diplophase, and the highest yields were obtained with either a triploid or a probable tetraploid, depending on the concentration of d-xylose. In addition, the rate of ethanol production from d-xylose and d-glucose increased, with the increment being larger on d-xylose. On d-galactose, the amount of ethanol produced within a given time also increased. The level of a by-product from d-xylose, xylitol, decreased on going from a haploid to higher ploidy, but there was no discernible trend for two other by-products, acetic acid and arabinitol. Increasing ploidy increased growth rate on d-galactose, but not appreciably on d-xylose. The altered properties on D-xylose of the strains tested were not due to increased levels of either d-xylose reductase or xylitol dehydrogenase, nor probably of alcohol dehydrogenase.", }