Abstract
Xylose and cellobiose fermentation by yeasts isolated from the Brazilian biodiversity
Highlights
The production of fuel ethanol has become important in recent years due to the future depletion of fossil fuels, and environmental concerns
Our results showed that the fermentation of xylose, cellobiose and glucose is a variable trait in the yeasts isolated from rotten wood
S. arborariae and S. passalidarum fermented xylose better than glucose probably due to a xylose reductase with significant activity (Km of 10-18 μM and Vmax of 0.38-0.50 U mg-1) with NADPH, and with NADH as cofactor, while the xylitol dehidrogenase was totally dependent on NAD+ (Km of 100 μM and Vmax of 0.25 U mg-1)
Summary
The production of fuel ethanol has become important in recent years due to the future depletion of fossil fuels, and environmental concerns. In the case of Brazil, the sugarcane bagasse is an interesting source of cellulose and hemicellulose, polymers that can be used in the fermentative process for fuel alcohol production [1].
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